Sync with NEO/py v1.11

.gitignore

@@ -6,5 +6,6 @@
 /build/
 /dist/
 /htmlcov/
+/neo/tests/ConflictFree.py
 /neo/tests/mock.py
 /neoppod.egg-info/

CHANGELOG.rst

 Change History
 ==============
 
+1.11 (2019-03-11)
+-----------------
+
+This release continues the work in v1.8 to stabilize NEO. A new 'stress'
+tool was added: it kills storage nodes and resets TCP connections randomly,
+while causing high concurrency activity. It revealed many bugs of all kinds,
+including crashes and corruptions. Most of them happened after network
+disconnection. In order to fix them all, several improvements have also been
+done to logging:
+
+- New neoctl command to flush the logs of all nodes in the cluster.
+- In logs, dump the partition table in a more compact and readable way.
+- client: log_flush most exceptions raised from Application to ZODB
+- More RTMIN+2 (log) information for clients and connections.
+- New log format to show node id (and optionally cluster name) in node column.
+- neolog: add support for zstd-compressed logs.
+- neolog: do not die when a table is corrupted.
+
+Other changes:
+
+- sqlite: optimize storage of metadata (the speed up in v1.9 about indexing
+  'obj' primarily by 'oid' was only effective for MySQL).
+- Fix error handling when setting up a listening connector.
+- The command line parsing of all executables has been completely rewritten,
+  fixing a few minor bugs.
+
 1.10 (2018-07-16)
 -----------------
 

go/neo/proto/proto.go

@@ -80,7 +80,7 @@ const (
 	// The protocol version must be increased whenever upgrading a node may require
 	// to upgrade other nodes. It is encoded as a 4-bytes big-endian integer and
 	// the high order byte 0 is different from TLS Handshake (0x16).
-	Version = 4
+	Version = 5
 
 	// length of packet header
 	PktHeaderLen = 10 // = unsafe.Sizeof(PktHeader{}), but latter gives typed constant (uintptr)
@@ -1171,6 +1171,12 @@ type Truncate struct {
 	// answer = Error
 }
 
+// Request all nodes to flush their logs.
+//
+//neo:nodes ctl -> A -> M -> *
+type FlushLog struct {}
+
+
 // ---- runtime support for protogen and custom codecs ----
 
 // customCodec is the interface that is implemented by types with custom encodings.

go/neo/proto/zproto-marshal.go

@@ -4092,6 +4092,23 @@ overflow:
 	return 0, ErrDecodeOverflow
 }
 
+// 65. FlushLog
+
+func (*FlushLog) NEOMsgCode() uint16 {
+	return 65
+}
+
+func (p *FlushLog) NEOMsgEncodedLen() int {
+	return 0
+}
+
+func (p *FlushLog) NEOMsgEncode(data []byte) {
+}
+
+func (p *FlushLog) NEOMsgDecode(data []byte) (int, error) {
+	return 0, nil
+}
+
 // registry of message types
 var msgTypeRegistry = map[uint16]reflect.Type{
 	0 | answerBit:  reflect.TypeOf(Error{}),
@@ -4193,4 +4210,5 @@ var msgTypeRegistry = map[uint16]reflect.Type{
 	62:             reflect.TypeOf(AddTransaction{}),
 	63:             reflect.TypeOf(AddObject{}),
 	64:             reflect.TypeOf(Truncate{}),
+	65:             reflect.TypeOf(FlushLog{}),
 }

go/neo/proto/ztestdata_proto_py_test.go

@@ -66,6 +66,7 @@ var pyMsgRegistry = map[uint16]string{
 	62:	"AddTransaction",
 	63:	"AddObject",
 	64:	"Truncate",
+	65:	"FlushLog",
 	32768:	"Error",
 	32769:	"AcceptIdentification",
 	32770:	"Pong",

neo/admin/app.py

 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -15,7 +15,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from neo.lib import logging
-from neo.lib.app import BaseApplication
+from neo.lib.app import BaseApplication, buildOptionParser
 from neo.lib.connection import ListeningConnection
 from neo.lib.exception import PrimaryFailure
 from .handler import AdminEventHandler, MasterEventHandler, \
@@ -25,24 +25,36 @@ from neo.lib.pt import PartitionTable
 from neo.lib.protocol import ClusterStates, Errors, NodeTypes, Packets
 from neo.lib.debug import register as registerLiveDebugger
 
+@buildOptionParser
 class Application(BaseApplication):
     """The storage node application."""
 
+    @classmethod
+    def _buildOptionParser(cls):
+        _ = cls.option_parser
+        _.description = "NEO Admin node"
+        cls.addCommonServerOptions('admin', '127.0.0.1:9999')
+
+        _ = _.group('admin')
+        _.int('u', 'uuid',
+            help="specify an UUID to use for this process (testing purpose)")
+
     def __init__(self, config):
         super(Application, self).__init__(
-            config.getSSL(), config.getDynamicMasterList())
-        for address in config.getMasters():
+            config.get('ssl'), config.get('dynamic_master_list'))
+        for address in config['masters']:
             self.nm.createMaster(address=address)
 
-        self.name = config.getCluster()
-        self.server = config.getBind()
+        self.name = config['cluster']
+        self.server = config['bind']
 
         logging.debug('IP address is %s, port is %d', *self.server)
 
         # The partition table is initialized after getting the number of
         # partitions.
         self.pt = None
-        self.uuid = config.getUUID()
+        self.uuid = config.get('uuid')
+        logging.node(self.name, self.uuid)
         self.request_handler = MasterRequestEventHandler(self)
         self.master_event_handler = MasterEventHandler(self)
         self.cluster_state = None

neo/admin/handler.py

 #
-# Copyright (C) 2009-2017  Nexedi SA
+# Copyright (C) 2009-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -62,6 +62,11 @@ class AdminEventHandler(EventHandler):
         master_node = self.app.master_node
         conn.answer(Packets.AnswerPrimary(master_node.getUUID()))
 
+    @check_primary_master
+    def flushLog(self, conn):
+        self.app.master_conn.send(Packets.FlushLog())
+        super(AdminEventHandler, self).flushLog(conn)
+
     askLastIDs = forward_ask(Packets.AskLastIDs)
     askLastTransaction = forward_ask(Packets.AskLastTransaction)
     addPendingNodes = forward_ask(Packets.AddPendingNodes)

neo/client/Storage.py

 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -15,6 +15,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from ZODB import BaseStorage, ConflictResolution, POSException
+from ZODB.POSException import ConflictError, UndoError
 from zope.interface import implementer
 import ZODB.interfaces
 
@@ -81,31 +82,68 @@ class Storage(BaseStorage.BaseStorage,
             return self.app.load(oid)[:2]
         except NEOStorageNotFoundError:
             raise POSException.POSKeyError(oid)
+        except Exception:
+            logging.exception('oid=%r', oid)
+            raise
 
     def new_oid(self):
+        try:
             return self.app.new_oid()
+        except Exception:
+            logging.exception('')
+            raise
 
     def tpc_begin(self, transaction, tid=None, status=' '):
         """
         Note: never blocks in NEO.
         """
+        try:
             return self.app.tpc_begin(self, transaction, tid, status)
+        except Exception:
+            logging.exception('transaction=%r, tid=%r', transaction, tid)
+            raise
 
     def tpc_vote(self, transaction):
+        try:
             return self.app.tpc_vote(transaction)
+        except ConflictError:
+            raise
+        except Exception:
+            logging.exception('transaction=%r', transaction)
+            raise
 
     def tpc_abort(self, transaction):
+        try:
             return self.app.tpc_abort(transaction)
+        except Exception:
+            logging.exception('transaction=%r', transaction)
+            raise
 
     def tpc_finish(self, transaction, f=None):
+        try:
             return self.app.tpc_finish(transaction, f)
+        except Exception:
+            logging.exception('transaction=%r', transaction)
+            raise
 
     def store(self, oid, serial, data, version, transaction):
         assert version == '', 'Versions are not supported'
+        try:
             return self.app.store(oid, serial, data, version, transaction)
+        except ConflictError:
+            raise
+        except Exception:
+            logging.exception('oid=%r, serial=%r, transaction=%r',
+                              oid, serial, transaction)
+            raise
 
     def deleteObject(self, oid, serial, transaction):
+        try:
             self.app.store(oid, serial, None, None, transaction)
+        except Exception:
+            logging.exception('oid=%r, serial=%r, transaction=%r',
+                              oid, serial, transaction)
+            raise
 
     # multiple revisions
     def loadSerial(self, oid, serial):
@@ -113,6 +151,9 @@ class Storage(BaseStorage.BaseStorage,
             return self.app.load(oid, serial)[0]
         except NEOStorageNotFoundError:
             raise POSException.POSKeyError(oid)
+        except Exception:
+            logging.exception('oid=%r, serial=%r', oid, serial)
+            raise
 
     def loadBefore(self, oid, tid):
         try:
@@ -121,6 +162,9 @@ class Storage(BaseStorage.BaseStorage,
             raise POSException.POSKeyError(oid)
         except NEOStorageNotFoundError:
             return None
+        except Exception:
+            logging.exception('oid=%r, tid=%r', oid, tid)
+            raise
 
     @property
     def iterator(self):
@@ -128,10 +172,20 @@ class Storage(BaseStorage.BaseStorage,
 
     # undo
     def undo(self, transaction_id, txn):
+        try:
             return self.app.undo(transaction_id, txn)
+        except (ConflictError, UndoError):
+            raise
+        except Exception:
+            logging.exception('transaction_id=%r, txn=%r', transaction_id, txn)
+            raise
 
     def undoLog(self, first=0, last=-20, filter=None):
+        try:
             return self.app.undoLog(first, last, filter)
+        except Exception:
+            logging.exception('first=%r, last=%r', first, last)
+            raise
 
     def supportsUndo(self):
         return True
@@ -141,10 +195,17 @@ class Storage(BaseStorage.BaseStorage,
             data, serial, _ = self.app.load(oid)
         except NEOStorageNotFoundError:
             raise POSException.POSKeyError(oid)
+        except Exception:
+            logging.exception('oid=%r', oid)
+            raise
         return data, serial, ''
 
     def __len__(self):
+        try:
             return self.app.getObjectCount()
+        except Exception:
+            logging.exception('')
+            raise
 
     def registerDB(self, db, limit=None):
         self.app.registerDB(db, limit)
@@ -154,19 +215,30 @@ class Storage(BaseStorage.BaseStorage,
             return self.app.history(oid, *args, **kw)
         except NEOStorageNotFoundError:
             raise POSException.POSKeyError(oid)
+        except Exception:
+            logging.exception('oid=%r', oid)
+            raise
 
     def sync(self):
         return self.app.sync()
 
     def copyTransactionsFrom(self, source, verbose=False):
         """ Zope compliant API """
+        try:
             return self.app.importFrom(self, source)
+        except Exception:
+            logging.exception('source=%r', source)
+            raise
 
     def pack(self, t, referencesf, gc=False):
         if gc:
             logging.warning('Garbage Collection is not available in NEO,'
                 ' please use an external tool. Packing without GC.')
+        try:
             self.app.pack(t)
+        except Exception:
+            logging.exception('pack_time=%r', t)
+            raise
 
     def lastSerial(self):
         # seems unused
@@ -198,6 +270,14 @@ class Storage(BaseStorage.BaseStorage,
             return self.app.getLastTID(oid)
         except NEOStorageNotFoundError:
             raise KeyError
+        except Exception:
+            logging.exception('oid=%r', oid)
+            raise
 
     def checkCurrentSerialInTransaction(self, oid, serial, transaction):
+        try:
             self.app.checkCurrentSerialInTransaction(oid, serial, transaction)
+        except Exception:
+            logging.exception('oid=%r, serial=%r, transaction=%r',
+                              oid, serial, transaction)
+            raise

neo/client/cache.py

 #
-# Copyright (C) 2011-2017  Nexedi SA
+# Copyright (C) 2011-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -64,7 +64,7 @@ class ClientCache(object):
       - The history queue only contains items with counter > 0
     """
 
-    __slots__ = ('_life_time', '_max_history_size', '_max_size',
+    __slots__ = ('max_size', '_life_time', '_max_history_size',
                  '_queue_list', '_oid_dict', '_time', '_size', '_history_size',
                  '_nhit', '_nmiss')
 
@@ -72,7 +72,7 @@ class ClientCache(object):
                                         max_size=20*1024*1024):
         self._life_time = life_time
         self._max_history_size = max_history_size
-        self._max_size = max_size
+        self.max_size = max_size
         self.clear()
 
     def clear(self):
@@ -94,7 +94,7 @@ class ClientCache(object):
             [self._history_size] + [
                 sum(1 for _ in self._iterQueue(level))
                 for level in xrange(1, len(self._queue_list))],
-            self._life_time, self._max_history_size, self._max_size)
+            self._life_time, self._max_history_size, self.max_size)
 
     def _iterQueue(self, level):
         """for debugging purpose"""
@@ -168,7 +168,7 @@ class ClientCache(object):
         # XXX It might be better to adjust the level according to the object
         # size. See commented factor for example.
         item.level = 1 + int(_log(counter, 2)
-                             # * (1.01 - len(item.data) / self._max_size)
+                             # * (1.01 - len(item.data) / self.max_size)
                             )
         self._add(item)
 
@@ -212,7 +212,7 @@ class ClientCache(object):
     def store(self, oid, data, tid, next_tid):
         """Store a new data record in the cache"""
         size = len(data)
-        max_size = self._max_size
+        max_size = self.max_size
         if size < max_size:
             item = self._load(oid, next_tid)
             if item:
@@ -331,7 +331,7 @@ def test(self):
     # Test late invalidations.
     cache.clear()
     cache.store(1, '10*', 10, None)
-    cache._max_size = cache._size
+    cache.max_size = cache._size
     cache.store(2, '10', 10, 15)
     self.assertEqual(cache._queue_list[0].oid, 1)
     cache.store(2, '15', 15, None)

neo/client/config.py

 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License

neo/client/exception.py

 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License

neo/client/handlers/__init__.py

 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License

neo/client/handlers/master.py

 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -127,8 +127,7 @@ class PrimaryNotificationsHandler(MTEventHandler):
             for oid in oid_list:
                 invalidate(oid, tid)
                 if oid == loading:
-                    app._loading_oid = None
-                    app._loading_invalidated = tid
+                    app._loading_invalidated.append(tid)
             db = app.getDB()
             if db is not None:
                 db.invalidate(tid, oid_list)

neo/client/handlers/storage.py

 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -18,7 +18,8 @@ from ZODB.TimeStamp import TimeStamp
 
 from neo.lib import logging
 from neo.lib.compress import decompress_list
-from neo.lib.protocol import Packets, uuid_str
+from neo.lib.connection import ConnectionClosed
+from neo.lib.protocol import Packets, uuid_str, ZERO_TID
 from neo.lib.util import dump, makeChecksum
 from neo.lib.exception import NodeNotReady
 from neo.lib.handler import MTEventHandler
@@ -29,19 +30,6 @@ from ..exception import NEOStorageReadRetry, NEOStorageDoesNotExistError
 
 class StorageEventHandler(MTEventHandler):
 
-    def connectionLost(self, conn, new_state):
-        node = self.app.nm.getByAddress(conn.getAddress())
-        assert node is not None
-        self.app.cp.removeConnection(node)
-        super(StorageEventHandler, self).connectionLost(conn, new_state)
-
-    def connectionFailed(self, conn):
-        # Connection to a storage node failed
-        node = self.app.nm.getByAddress(conn.getAddress())
-        assert node is not None
-        self.app.cp.removeConnection(node)
-        super(StorageEventHandler, self).connectionFailed(conn)
-
     def _acceptIdentification(*args):
         pass
 
@@ -58,9 +46,12 @@ class StorageAnswersHandler(AnswerBaseHandler):
     def answerObject(self, conn, oid, *args):
         self.app.setHandlerData(args)
 
-    def answerStoreObject(self, conn, conflict, oid):
+    def answerStoreObject(self, conn, conflict, oid, serial):
         txn_context = self.app.getHandlerData()
         if conflict:
+            if conflict == ZERO_TID:
+                txn_context.written(self.app, conn.getUUID(), oid, serial)
+                return
             # Conflicts can not be resolved now because 'conn' is locked.
             # We must postpone the resolution (by queuing the conflict in
             # 'conflict_dict') to avoid any deadlock with another thread that
@@ -94,7 +85,7 @@ class StorageAnswersHandler(AnswerBaseHandler):
                 conn.ask(Packets.AskRebaseObject(ttid, oid),
                          queue=queue, oid=oid)
         except ConnectionClosed:
-            txn_context.involved_nodes[conn.getUUID()] = 2
+            txn_context.conn_dict[conn.getUUID()] = None
 
     def answerRebaseObject(self, conn, conflict, oid):
         if conflict:
@@ -106,8 +97,10 @@ class StorageAnswersHandler(AnswerBaseHandler):
                 cached = txn_context.cache_dict.pop(oid)
             except KeyError:
                 if resolved:
-                    # We should still be waiting for an answer from this node.
-                    assert conn.uuid in txn_context.data_dict[oid][2]
+                    # We should still be waiting for an answer from this node,
+                    # unless we lost connection.
+                    assert conn.uuid in txn_context.data_dict[oid][2] or \
+                           txn_context.conn_dict[conn.uuid] is None
                     return
                 assert oid in txn_context.data_dict
                 if serial <= txn_context.conflict_dict.get(oid, ''):
@@ -135,7 +128,7 @@ class StorageAnswersHandler(AnswerBaseHandler):
                     if cached:
                         assert cached == data
                         txn_context.cache_size -= size
-                txn_context.data_dict[oid] = data, serial, None
+                txn_context.data_dict[oid] = data, serial, []
             txn_context.conflict_dict[oid] = conflict
 
     def answerStoreTransaction(self, conn):
@@ -144,6 +137,7 @@ class StorageAnswersHandler(AnswerBaseHandler):
     answerVoteTransaction = answerStoreTransaction
 
     def connectionClosed(self, conn):
+        # only called if we were waiting for an answer
         txn_context = self.app.getHandlerData()
         if type(txn_context) is Transaction:
             txn_context.nodeLost(self.app, conn.getUUID())

neo/client/iterator.py

 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License

neo/client/pool.py

-#
-# Copyright (C) 2006-2017  Nexedi SA
-#
-# This program is free software; you can redistribute it and/or
-# modify it under the terms of the GNU General Public License
-# as published by the Free Software Foundation; either version 2
-# of the License, or (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-import random, time
-from neo.lib import logging
-from neo.lib.locking import Lock
-from neo.lib.protocol import NodeTypes, Packets
-from neo.lib.connection import MTClientConnection, ConnectionClosed
-from neo.lib.exception import NodeNotReady
-from .exception import NEOPrimaryMasterLost
-
-# How long before we might retry a connection to a node to which connection
-# failed in the past.
-MAX_FAILURE_AGE = 600
-
-
-class ConnectionPool(object):
-    """This class manages a pool of connections to storage nodes."""
-
-    def __init__(self, app):
-        self.app = app
-        self.connection_dict = {}
-        # Define a lock in order to create one connection to
-        # a storage node at a time to avoid multiple connections
-        # to the same node.
-        self._lock = Lock()
-        self.node_failure_dict = {}
-
-    def _initNodeConnection(self, node):
-        """Init a connection to a given storage node."""
-        app = self.app
-        if app.master_conn is None:
-            raise NEOPrimaryMasterLost
-        conn = MTClientConnection(app, app.storage_event_handler, node,
-                                  dispatcher=app.dispatcher)
-        p = Packets.RequestIdentification(NodeTypes.CLIENT,
-            app.uuid, None, app.name, (), app.id_timestamp)
-        try:
-            app._ask(conn, p, handler=app.storage_bootstrap_handler)
-        except ConnectionClosed:
-            logging.error('Connection to %r failed', node)
-        except NodeNotReady:
-            logging.info('%r not ready', node)
-        else:
-            logging.info('Connected %r', node)
-            # Make sure this node will be considered for the next reads
-            # even if there was a previous recent failure.
-            self.node_failure_dict.pop(node.getUUID(), None)
-            return conn
-        self.node_failure_dict[node.getUUID()] = time.time() + MAX_FAILURE_AGE
-
-    def getCellSortKey(self, cell, random=random.random):
-        # Prefer a node that didn't fail recently.
-        failure = self.node_failure_dict.get(cell.getUUID())
-        if failure:
-            if time.time() < failure:
-                # Or order by date of connection failure.
-                return failure
-            # Do not use 'del' statement: we didn't lock, so another
-            # thread might have removed uuid from node_failure_dict.
-            self.node_failure_dict.pop(cell.getUUID(), None)
-        # A random one, connected or not, is a trivial and quite efficient way
-        # to distribute the load evenly. On write accesses, a client connects
-        # to all nodes of touched cells, but before that, or if a client is
-        # specialized to only do read-only accesses, it should not limit
-        # itself to only use the first connected nodes.
-        return random()
-
-    def getConnForNode(self, node):
-        """Return a locked connection object to a given node
-        If no connection exists, create a new one"""
-        if node.isRunning():
-            uuid = node.getUUID()
-            try:
-                # Already connected to node
-                return self.connection_dict[uuid]
-            except KeyError:
-                with self._lock:
-                    # Second lookup, if another thread initiated connection
-                    # while we were waiting for connection lock.
-                    try:
-                        return self.connection_dict[uuid]
-                    except KeyError:
-                        # Create new connection to node
-                        conn = self._initNodeConnection(node)
-                        if conn is not None:
-                            self.connection_dict[uuid] = conn
-                            return conn
-
-    def removeConnection(self, node):
-        self.connection_dict.pop(node.getUUID(), None)
-
-    def closeAll(self):
-        with self._lock:
-            while 1:
-                try:
-                    conn = self.connection_dict.popitem()[1]
-                except KeyError:
-                    break
-                conn.setReconnectionNoDelay()
-                conn.close()

neo/client/transactions.py

 #
-# Copyright (C) 2017  Nexedi SA
+# Copyright (C) 2017-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -14,10 +14,12 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
+from collections import defaultdict
 from ZODB.POSException import StorageTransactionError
 from neo.lib.connection import ConnectionClosed
 from neo.lib.locking import SimpleQueue
 from neo.lib.protocol import Packets
+from neo.lib.util import dump
 from .exception import NEOStorageError
 
 @apply
@@ -35,6 +37,7 @@ class Transaction(object):
     locking_tid = None
     voted = False
     ttid = None     # XXX: useless, except for testBackupReadOnlyAccess
+    lockless_dict = None                    # {partition: {uuid}}
 
     def __init__(self, txn):
         self.queue = SimpleQueue()
@@ -47,72 +50,85 @@ class Transaction(object):
         self.conflict_dict = {}             # {oid: serial}
         # resolved conflicts
         self.resolved_dict = {}             # {oid: serial}
-        # Keys are node ids instead of Node objects because a node may
-        # disappear from the cluster. In any case, we always have to check
-        # if the id is still known by the NodeManager.
-        # status: 0 -> check only, 1 -> store, 2 -> failed
-        self.involved_nodes = {}            # {node_id: status}
+        # involved storage nodes; connection is None is connection was lost
+        self.conn_dict = {}                 # {node_id: connection}
+
+    def __repr__(self):
+        error = self.error
+        return ("<%s ttid=%s locking_tid=%s voted=%u"
+                " #queue=%s #writing=%s #written=%s%s>") % (
+            self.__class__.__name__,
+            dump(self.ttid), dump(self.locking_tid), self.voted,
+            len(self.queue._queue), len(self.data_dict), len(self.cache_dict),
+            ' error=%r' % error if error else '')
 
     def wakeup(self, conn):
         self.queue.put((conn, _WakeupPacket, {}))
 
-    def write(self, app, packet, object_id, store=1, **kw):
+    def write(self, app, packet, object_id, **kw):
         uuid_list = []
         pt = app.pt
-        involved = self.involved_nodes
+        conn_dict = self.conn_dict
         object_id = pt.getPartition(object_id)
         for cell in pt.getCellList(object_id):
             node = cell.getNode()
             uuid = node.getUUID()
-            status = involved.get(uuid, -1)
-            if status < store:
-                involved[uuid] = store
-            elif status > 1:
-                continue
-            conn = app.cp.getConnForNode(node)
-            if conn is not None:
             try:
-                    if status < 0 and self.locking_tid and 'oid' in kw:
+                try:
+                    conn = conn_dict[uuid]
+                except KeyError:
+                    conn = conn_dict[uuid] = app.getStorageConnection(node)
+                    if self.locking_tid and 'oid' in kw:
                         # A deadlock happened but this node is not aware of it.
                         # Tell it to write-lock with the same locking tid as
-                        # for the other nodes. The condition on kw is because
-                        # we don't need that for transaction metadata.
+                        # for the other nodes. The condition on kw is to
+                        # distinguish whether we're writing an oid or
+                        # transaction metadata.
                         conn.ask(Packets.AskRebaseTransaction(
                             self.ttid, self.locking_tid), queue=self.queue)
                 conn.ask(packet, queue=self.queue, **kw)
                 uuid_list.append(uuid)
-                    continue
+            except AttributeError:
+                if conn is not None:
+                    raise
             except ConnectionClosed:
-                    pass
-            involved[uuid] = 2
+                conn_dict[uuid] = None
         if uuid_list:
             return uuid_list
         raise NEOStorageError(
             'no storage available for write to partition %s' % object_id)
 
-    def written(self, app, uuid, oid):
-        # When a node that is being disconnected by the master because it was
+    def written(self, app, uuid, oid, lockless=None):
+        # When a node is being disconnected by the master because it was
         # not part of the transaction that caused a conflict, we may receive a
         # positive answer (not to be confused with lockless stores) before the
         # conflict. Because we have no way to identify such case, we must keep
         # the data in self.data_dict until all nodes have answered so we remain
         # able to resolve conflicts.
-        try:
         data, serial, uuid_list = self.data_dict[oid]
+        try:
             uuid_list.remove(uuid)
-        except KeyError:
-            # 1. store to S1 and S2
-            # 2. S2 reports a conflict
-            # 3. store to S1 and S2 # conflict resolution
-            # 4. S1 does not report a conflict (lockless)
-            # 5. S2 answers before S1 for the second store
-            return
         except ValueError:
             # The most common case for this exception is because nodeLost()
-            # tries all oids blindly. Other possible cases:
-            # - like above (KeyError), but with S2 answering last
-            # - answer to resolved conflict before the first answer from a
-            #   node that was being disconnected by the master
+            # tries all oids blindly.
+            # Another possible case is when we receive several positive answers
+            # from a node that is being disconnected by the master, whereas the
+            # first one (at least) should actually be conflict answer.
+            return
+        if lockless:
+            if lockless != serial: # late lockless write
+                assert lockless < serial, (lockless, serial)
+                uuid_list.append(uuid)
+                return
+            # It's safe to do this after the above excepts: either the cell is
+            # already marked as lockless or the node will be reported as failed.
+            lockless = self.lockless_dict
+            if not lockless:
+                lockless = self.lockless_dict = defaultdict(set)
+            lockless[app.pt.getPartition(oid)].add(uuid)
+            if oid in self.conflict_dict:
+                # In the case of a rebase, uuid_list may not contain the id
+                # of the node reporting a conflict.
                 return
         if uuid_list:
             return
@@ -121,7 +137,7 @@ class Transaction(object):
             size = len(data)
             self.data_size -= size
             size += self.cache_size
-            if size < app._cache._max_size:
+            if size < app._cache.max_size:
                 self.cache_size = size
             else:
                 # Do not cache data past cache max size, as it
@@ -131,8 +147,13 @@ class Transaction(object):
         self.cache_dict[oid] = data
 
     def nodeLost(self, app, uuid):
-        self.involved_nodes[uuid] = 2
+        # The following line is sometimes redundant
+        # with the one in `except ConnectionClosed:` clauses.
+        self.conn_dict[uuid] = None
         for oid in list(self.data_dict):
+            # Exclude case of 1 conflict error immediately followed by a
+            # connection loss, possibly with lockless writes to replicas.
+            if oid not in self.conflict_dict:
                 self.written(app, uuid, oid)
 
 

neo/client/zodburi.py

 #
-# Copyright (C) 2017  Nexedi SA
+# Copyright (C) 2017-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License

neo/debug.py

@@ -45,50 +45,12 @@ if IF == 'pdb':
           #('ZPublisher.Publish', 'publish_module_standard'),
          )
 
-    import errno, socket, threading, weakref
-    # Unfortunately, IPython does not always print to given stdout.
-    #from neo.lib.debug import getPdb
+    import socket, threading, weakref
+    from neo.lib.debug import PdbSocket
+    # We don't use the one from neo.lib.debug because unfortunately,
+    # IPython does not always print to given stdout.
     from pdb import Pdb as getPdb
 
-    class Socket(object):
-
-        def __init__(self, socket):
-            # In case that the default timeout is not None.
-            socket.settimeout(None)
-            self._socket = socket
-            self._buf = ''
-
-        def write(self, data):
-            self._socket.send(data)
-
-        def readline(self):
-            recv = self._socket.recv
-            data = self._buf
-            while True:
-                i = 1 + data.find('\n')
-                if i:
-                    self._buf = data[i:]
-                    return data[:i]
-                d = recv(4096)
-                data += d
-                if not d:
-                    self._buf = ''
-                    return data
-
-        def flush(self):
-            pass
-
-        def closed(self):
-            self._socket.setblocking(0)
-            try:
-                self._socket.recv(0)
-                return True
-            except socket.error, (err, _):
-                if err != errno.EAGAIN:
-                    raise
-                self._socket.setblocking(1)
-            return False
-
     def pdb():
         s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
         try:
@@ -98,7 +60,7 @@ if IF == 'pdb':
             s.listen(0)
             print 'Listening to %u' % s.getsockname()[1]
             sys.stdout.flush() # BBB: On Python 3, print() takes a 'flush' arg.
-            _socket = Socket(s.accept()[0])
+            _socket = PdbSocket(s.accept()[0])
         finally:
             s.close()
         try:
@@ -155,9 +117,12 @@ if IF == 'pdb':
     if BP:
         setupBreakPoints(BP)
     else:
-        threading.Thread(target=pdb).start()
+        threading.Thread(target=pdb, name='pdb').start()
 
 elif IF == 'frames':
+    # WARNING: Because of https://bugs.python.org/issue17094, the output is
+    #          usually incorrect for subprocesses started by the functional
+    #          test framework.
     import traceback
     write = sys.stderr.write
     for thread_id, frame in sys._current_frames().iteritems():
@@ -178,3 +143,68 @@ elif IF == 'profile':
         prof = cProfile.Profile()
         threading.Timer(DURATION, stop, (prof, path)).start()
         prof.enable()
+
+elif IF == 'trace-cache':
+    from struct import Struct
+    from .client.cache import ClientCache
+    from .lib.protocol import uuid_str, ZERO_TID as z64
+
+    class CacheTracer(object):
+
+        _pack2 = Struct('!B8s8s').pack
+        _pack4 = Struct('!B8s8s8sL').pack
+
+        def __init__(self, cache, path):
+            self._cache = cache
+            self._trace_file = open(path, 'a')
+
+        def close(self):
+            self._trace_file.close()
+            return self._cache
+
+        def _trace(self, op, x, y=z64, z=z64):
+            self._trace_file.write(self._pack(op, x, y, z))
+
+        def __repr__(self):
+            return repr(self._cache)
+
+        @property
+        def max_size(self):
+            return self._cache.max_size
+
+        def clear(self):
+            self._trace_file.write('\0')
+            self._cache.clear()
+
+        def clear_current(self):
+            self._trace_file.write('\1')
+            self._cache.clear_current()
+
+        def load(self, oid, before_tid=None):
+            r = self._cache.load(oid, before_tid)
+            self._trace_file.write(self._pack2(
+                3 if r else 2, oid, before_tid or z64))
+            return r
+
+        def store(self, oid, data, tid, next_tid):
+            self._trace_file.write(self._pack4(
+                4, oid, tid, next_tid or z64, len(data)))
+            self._cache.store(oid, data, tid, next_tid)
+
+        def invalidate(self, oid, tid):
+            self._trace_file.write(self._pack2(5, oid, tid))
+            self._cache.invalidate(oid, tid)
+
+    @defer
+    def profile(app):
+        app._cache_lock_acquire()
+        try:
+            cache = app._cache
+            if type(cache) is ClientCache:
+                app._cache = CacheTracer(cache, '%s-%s.neo-cache-trace' %
+                                          (app.name, uuid_str(app.uuid)))
+                app._cache.clear()
+            else:
+                app._cache = cache.close()
+        finally:
+            app._cache_lock_release()

neo/lib/__init__.py

 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License

neo/lib/app.py

 #
-# Copyright (C) 2015-2017  Nexedi SA
+# Copyright (C) 2015-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -14,16 +14,57 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-from . import logging
+from . import logging, util
+from .config import OptionList
 from .event import EventManager
 from .node import NodeManager
 
 
+def buildOptionParser(cls):
+    parser = cls.option_parser = cls.OptionList()
+    _ = parser.path
+    _('l', 'logfile',
+        help="log debugging information to specified SQLite DB")
+    _('ca',  help="(SSL) certificate authority in PEM format")
+    _('cert', help="(SSL) certificate in PEM format")
+    _('key', help="(SSL) private key in PEM format")
+    cls._buildOptionParser()
+    return cls
+
+
 class BaseApplication(object):
 
+    class OptionList(OptionList):
+
+        def parse(self, argv=None):
+            config = OptionList.parse(self, argv)
+            ssl = (
+                config.pop('ca', None),
+                config.pop('cert', None),
+                config.pop('key', None),
+            )
+            if any(ssl):
+                config['ssl'] = ssl
+            return config
+
     server = None
     ssl = None
 
+    @classmethod
+    def addCommonServerOptions(cls, section, bind, masters='127.0.0.1:10000'):
+        _ = cls.option_parser.group('server node')
+        _.path('f', 'file', help='specify a configuration file')
+        _('s', 'section', default=section,
+            help='specify a configuration section')
+        _('c', 'cluster', required=True, help='the cluster name')
+        _('m', 'masters', default=masters, parse=util.parseMasterList,
+            help='master node list')
+        _('b', 'bind', default=bind,
+            parse=lambda x: util.parseNodeAddress(x, 0),
+            help='the local address to bind to')
+        _.path('D', 'dynamic-master-list',
+            help='path of the file containing dynamic master node list')
+
     def __init__(self, ssl=None, dynamic_master_list=None):
         if ssl:
             if not all(ssl):
@@ -60,3 +101,8 @@ class BaseApplication(object):
         self.nm.close()
         self.em.close()
         self.__dict__.clear()
+
+    def setUUID(self, uuid):
+        if self.uuid != uuid:
+            self.uuid = uuid
+            logging.node(self.name, uuid)

neo/lib/attributeTracker.py

 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License

neo/lib/bootstrap.py

 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License

neo/lib/compress.py

 #
-# Copyright (C) 2018  Nexedi SA
+# Copyright (C) 2018-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License

neo/lib/connection.py

 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -333,6 +333,7 @@ class Connection(BaseConnection):
         return r, flags
 
     def setOnClose(self, callback):
+        assert not self.isClosed(), self
         self._on_close = callback
 
     def isClient(self):

neo/lib/connector.py

 #
-# Copyright (C) 2009-2017  Nexedi SA
+# Copyright (C) 2009-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -34,6 +34,7 @@ class SocketConnector(object):
     is_closed = is_server = None
     connect_limit = {}
     CONNECT_LIMIT = 1
+    KEEPALIVE = 60, 3, 10
     SOMAXCONN = 5 # for threaded tests
 
     def __new__(cls, addr, s=None):
@@ -66,9 +67,10 @@ class SocketConnector(object):
         # The following 3 lines are specific to Linux. It seems that OSX
         # has similar options (TCP_KEEPALIVE/TCP_KEEPINTVL/TCP_KEEPCNT),
         # and Windows has SIO_KEEPALIVE_VALS (fixed count of 10).
-        s.setsockopt(socket.IPPROTO_TCP, socket.TCP_KEEPIDLE, 60)
-        s.setsockopt(socket.IPPROTO_TCP, socket.TCP_KEEPCNT, 3)
-        s.setsockopt(socket.IPPROTO_TCP, socket.TCP_KEEPINTVL, 10)
+        idle, cnt, intvl = self.KEEPALIVE
+        s.setsockopt(socket.IPPROTO_TCP, socket.TCP_KEEPIDLE, idle)
+        s.setsockopt(socket.IPPROTO_TCP, socket.TCP_KEEPCNT, cnt)
+        s.setsockopt(socket.IPPROTO_TCP, socket.TCP_KEEPINTVL, intvl)
         s.setsockopt(socket.SOL_SOCKET, socket.SO_KEEPALIVE, 1)
         # disable Nagle algorithm to reduce latency
         s.setsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)
@@ -127,6 +129,7 @@ class SocketConnector(object):
             self._bind(self.addr)
             self.socket.listen(self.SOMAXCONN)
         except socket.error, e:
+            self.is_closed = True
             self.socket.close()
             self._error('listen', e)
 
@@ -174,7 +177,11 @@ class SocketConnector(object):
         self._error('recv')
 
     def send(self):
-        # XXX: unefficient for big packets
+        # XXX: Inefficient for big packets. In any case, we should make sure
+        #      that 'msg' does not exceed 2GB with SSL (OverflowError).
+        #      Before commit 1a064725b81a702a124d672dba2bcae498980c76,
+        #      this happened when many big AddObject packets were sent
+        #      for a single replication chunk.
         msg = ''.join(self.queued)
         if msg:
             try:
@@ -216,12 +223,13 @@ class SocketConnector(object):
 
     def __repr__(self):
         if self.is_closed is None:
-            state = 'never opened'
+            state = ', never opened'
         else:
             if self.is_closed:
-                state = 'closed '
+                state = ', closed '
             else:
-                state = 'opened '
+                state = ' fileno %s %s, opened ' % (
+                    self.socket_fd, self.getAddress())
             if self.is_server is None:
                 state += 'listening'
             else:
@@ -230,9 +238,7 @@ class SocketConnector(object):
                 else:
                     state += 'to '
                 state += str(self.addr)
-        return '<%s at 0x%x fileno %s %s, %s>' % (self.__class__.__name__,
-            id(self), '?' if self.is_closed else self.socket_fd,
-            self.getAddress(), state)
+        return '<%s at 0x%x%s>' % (self.__class__.__name__, id(self), state)
 
 class SocketConnectorIPv4(SocketConnector):
     " Wrapper for IPv4 sockets"

neo/lib/debug.py

 #
-# Copyright (C) 2010-2017  Nexedi SA
+# Copyright (C) 2010-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -14,11 +14,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-import traceback
-import signal
-import imp
-import os
-import sys
+import errno, imp, os, signal, socket, sys, traceback
 from functools import wraps
 import neo
 
@@ -82,9 +78,55 @@ def winpdb(depth=0):
             os.abort()
 
 def register(on_log=None):
+    try:
         if on_log is not None:
             @safe_handler
             def on_log_signal(signum, signal):
                 on_log()
             signal.signal(signal.SIGRTMIN+2, on_log_signal)
         signal.signal(signal.SIGRTMIN+3, debugHandler)
+    except ValueError: # signal only works in main thread
+        pass
+
+
+class PdbSocket(object):
+
+    def __init__(self, socket):
+        # In case that the default timeout is not None.
+        socket.settimeout(None)
+        self._socket = socket
+        self._buf = ''
+
+    def close(self):
+        self._socket.close()
+
+    def write(self, data):
+        self._socket.send(data)
+
+    def readline(self):
+        recv = self._socket.recv
+        data = self._buf
+        while True:
+            i = 1 + data.find('\n')
+            if i:
+                self._buf = data[i:]
+                return data[:i]
+            d = recv(4096)
+            data += d
+            if not d:
+                self._buf = ''
+                return data
+
+    def flush(self):
+        pass
+
+    def closed(self):
+        self._socket.setblocking(0)
+        try:
+            self._socket.recv(0)
+            return True
+        except socket.error, (err, _):
+            if err != errno.EAGAIN:
+                raise
+            self._socket.setblocking(1)
+            return False

neo/lib/dispatcher.py

 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -87,13 +87,11 @@ class Dispatcher:
     def unregister(self, conn):
         """ Unregister a connection and put fake packet in queues to unlock
         threads expecting responses from that connection """
+        notified_set = set()
+        _decrefQueue = self._decrefQueue
         self.lock_acquire()
         try:
             message_table = self.message_table.pop(id(conn), EMPTY)
-        finally:
-            self.lock_release()
-        notified_set = set()
-        _decrefQueue = self._decrefQueue
             for queue in message_table.itervalues():
                 if queue is NOBODY:
                     continue
@@ -102,6 +100,8 @@ class Dispatcher:
                     queue.put((conn, _ConnectionClosed, EMPTY))
                     notified_set.add(queue_id)
                 _decrefQueue(queue)
+        finally:
+            self.lock_release()
 
     @giant_lock
     def forget_queue(self, queue, flush_queue=True):

neo/lib/event.py

 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -314,6 +314,11 @@ class EpollEventManager(object):
         for fd, conn in self.connection_dict.items():
             logging.info('    %r: %r (pending=%r)', fd, conn,
                 conn in pending_set)
+            for request_dict, handler in conn._handlers._pending:
+                handler = handler.__class__.__name__
+                for msg_id, (klass, kw) in sorted(request_dict.items()):
+                    logging.info('      #0x%04x %s (%s)', msg_id,
+                                 klass.__name__, handler)
 
 
 # Default to EpollEventManager.

neo/lib/exception.py

 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License

neo/lib/handler.py

 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -175,9 +175,7 @@ class EventHandler(object):
                 if your_uuid is None:
                     raise ProtocolError('No UUID supplied')
                 logging.info('connected to a primary master node')
-                if app.uuid != your_uuid:
-                    app.uuid = your_uuid
-                    logging.info('Got a new UUID: %s', uuid_str(your_uuid))
+                app.setUUID(your_uuid)
                 app.id_timestamp = None
             elif node.getUUID() != uuid or app.uuid != your_uuid != None:
                 raise ProtocolError('invalid uuids')
@@ -201,6 +199,9 @@ class EventHandler(object):
         if not conn.client:
             conn.close()
 
+    def flushLog(self, conn):
+        logging.flush()
+
     # Error packet handlers.
 
     def error(self, conn, code, message, **kw):

neo/lib/interfaces.py

 #
-# Copyright (C) 2015-2017  Nexedi SA
+# Copyright (C) 2015-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License

neo/lib/locking.py

@@ -26,7 +26,7 @@ from Queue import Empty
 
 class LockUser(object):
 
-    def __init__(self, message, level=0):
+    def __init__(self, message=None, level=0):
         t = threading.currentThread()
         ident = getattr(t, 'node_name', t.name)
         # This class is instantiated from a place desiring to known what
@@ -42,6 +42,7 @@ class LockUser(object):
         # current Neo directory structure.
         path = os.path.join('...', *path.split(os.path.sep)[-3:])
         self.time = time()
+        if message is not None:
             self.ident = "%s@%r %s:%s %s" % (
                 ident, self.time, path, line_number, line)
             self.note(message)

neo/lib/logger.py

 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -22,6 +22,9 @@ from time import time
 from traceback import format_exception
 import bz2, inspect, neo, os, signal, sqlite3, sys, threading
 
+from .util import nextafter
+INF = float('inf')
+
 # Stats for storage node of matrix test (py2.7:SQLite)
 RECORD_SIZE = ( 234360832 # extra memory used
               - 16777264  # sum of raw data ('msg' attribute)
@@ -59,9 +62,8 @@ class NEOLogger(Logger):
         self.parent = root = getLogger()
         if not root.handlers:
             root.addHandler(self.default_root_handler)
-        self._db = None
-        self._record_queue = deque()
-        self._record_size = 0
+        self.__reset()
+        self._nid_dict = {}
         self._async = set()
         l = threading.Lock()
         self._acquire = l.acquire
@@ -75,6 +77,12 @@ class NEOLogger(Logger):
         self._release = _release
         self.backlog()
 
+    def __reset(self):
+        self._db = None
+        self._node = {}
+        self._record_queue = deque()
+        self._record_size = 0
+
     def __enter__(self):
         self._acquire()
         return self._db
@@ -94,7 +102,7 @@ class NEOLogger(Logger):
         if self._db is None:
             return
         q = self._db.execute
-        if not q("SELECT id FROM packet LIMIT 1").fetchone():
+        if not q("SELECT 1 FROM packet LIMIT 1").fetchone():
             q("DROP TABLE protocol")
             # DROP TABLE already replaced previous data with zeros,
             # so VACUUM is not really useful. But here, it should be free.
@@ -149,9 +157,7 @@ class NEOLogger(Logger):
         if self._db is not None:
             self._db.close()
             if not filename:
-                self._db = None
-                self._record_queue.clear()
-                self._record_size = 0
+                self.__reset()
                 return
         if filename:
             self._db = sqlite3.connect(filename, check_same_thread=False)
@@ -161,45 +167,52 @@ class NEOLogger(Logger):
             if 1: # Not only when logging everything,
                   # but also for interoperability with logrotate.
                 q("PRAGMA journal_mode = MEMORY")
+            for t, columns in (('log', (
+                                  "level INTEGER NOT NULL",
+                                  "pathname TEXT",
+                                  "lineno INTEGER",
+                                  "msg TEXT",
+                              )),
+                              ('packet', (
+                                  "msg_id INTEGER NOT NULL",
+                                  "code INTEGER NOT NULL",
+                                  "peer TEXT NOT NULL",
+                                  "body BLOB",
+                              ))):
                 if reset:
-                for t in 'log', 'packet':
                     q('DROP TABLE IF EXISTS ' + t)
-            q("""CREATE TABLE IF NOT EXISTS log (
-                    id INTEGER PRIMARY KEY AUTOINCREMENT,
-                    date REAL NOT NULL,
-                    name TEXT,
-                    level INTEGER NOT NULL,
-                    pathname TEXT,
-                    lineno INTEGER,
-                    msg TEXT)
+                    q('DROP TABLE IF EXISTS %s1' % t)
+                elif (2, 'name', 'TEXT', 0, None, 0) in q(
+                        "PRAGMA table_info(%s)" % t):
+                    q("ALTER TABLE %s RENAME TO %s1" % (t, t))
+                columns = (
+                    "date REAL PRIMARY KEY",
+                    "node INTEGER",
+                ) + columns
+                q("CREATE TABLE IF NOT EXISTS %s (\n  %s) WITHOUT ROWID"
+                  % (t, ',\n  '.join(columns)))
+            q("""CREATE TABLE IF NOT EXISTS protocol (
+                    date REAL PRIMARY KEY,
+                    text BLOB NOT NULL) WITHOUT ROWID
               """)
-            q("""CREATE INDEX IF NOT EXISTS _log_i1 ON log(date)""")
-            q("""CREATE TABLE IF NOT EXISTS packet (
-                    id INTEGER PRIMARY KEY AUTOINCREMENT,
-                    date REAL NOT NULL,
+            q("""CREATE TABLE IF NOT EXISTS node (
+                    id INTEGER PRIMARY KEY,
                     name TEXT,
-                    msg_id INTEGER NOT NULL,
-                    code INTEGER NOT NULL,
-                    peer TEXT NOT NULL,
-                    body BLOB)
-              """)
-            q("""CREATE INDEX IF NOT EXISTS _packet_i1 ON packet(date)""")
-            q("""CREATE TABLE IF NOT EXISTS protocol (
-                    date REAL PRIMARY KEY NOT NULL,
-                    text BLOB NOT NULL)
+                    cluster TEXT,
+                    nid INTEGER)
               """)
             with open(inspect.getsourcefile(p)) as p:
                 p = buffer(bz2.compress(p.read()))
-            for t, in q("SELECT text FROM protocol ORDER BY date DESC"):
-                if p == t:
-                    break
-            else:
-                try:
-                    t = self._record_queue[0].created
-                except IndexError:
-                    t = time()
-                with self._db:
-                    q("INSERT INTO protocol VALUES (?,?)", (t, p))
+            x = q("SELECT text FROM protocol ORDER BY date DESC LIMIT 1"
+                ).fetchone()
+            if (x and x[0]) != p:
+                # In case of multithreading, we can have locally unsorted
+                # records so we can't find the oldest one (it may not be
+                # pushed to queue): let's use 0 on log rotation.
+                x = time() if x else 0
+                q("INSERT INTO protocol VALUES (?,?)", (x, p))
+                self._db.commit()
+            self._node = {x[1:]: x[0] for x in q("SELECT * FROM node")}
 
     def setup(self, filename=None, reset=False):
         with self:
@@ -217,6 +230,20 @@ class NEOLogger(Logger):
         return True
 
     def _emit(self, r):
+        try:
+            nid = self._node[r._node]
+        except KeyError:
+            if r._node == (None, None, None):
+                nid = None
+            else:
+                try:
+                    nid = 1 + max(x for x in self._node.itervalues()
+                                    if x is not None)
+                except ValueError:
+                    nid = 0
+                self._db.execute("INSERT INTO node VALUES (?,?,?,?)",
+                    (nid,) + r._node)
+            self._node[r._node] = nid
         if type(r) is PacketRecord:
             ip, port = r.addr
             peer = ('%s %s ([%s]:%s)' if ':' in ip else '%s %s (%s:%s)') % (
@@ -224,15 +251,22 @@ class NEOLogger(Logger):
             msg = r.msg
             if msg is not None:
                 msg = buffer(msg)
-            self._db.execute("INSERT INTO packet VALUES (NULL,?,?,?,?,?,?)",
-                (r.created, r._name, r.msg_id, r.code, peer, msg))
+            q = "INSERT INTO packet VALUES (?,?,?,?,?,?)"
+            x = [r.created, nid, r.msg_id, r.code, peer, msg]
         else:
             pathname = os.path.relpath(r.pathname, *neo.__path__)
-            self._db.execute("INSERT INTO log VALUES (NULL,?,?,?,?,?,?)",
-                (r.created, r._name, r.levelno, pathname, r.lineno, r.msg))
+            q = "INSERT INTO log VALUES (?,?,?,?,?,?)"
+            x = [r.created, nid, r.levelno, pathname, r.lineno, r.msg]
+        while 1:
+            try:
+                self._db.execute(q, x)
+                break
+            except sqlite3.IntegrityError:
+                x[0] = nextafter(x[0], INF)
 
     def _queue(self, record):
-        record._name = self.name and str(self.name)
+        name = self.name and str(self.name)
+        record._node = (name,) + self._nid_dict.get(name, (None, None))
         self._acquire()
         try:
             if self._max_size is None:
@@ -277,6 +311,18 @@ class NEOLogger(Logger):
                 addr=connection.getAddress(),
                 msg=body))
 
+    def node(self, *cluster_nid):
+        name = self.name and str(self.name)
+        prev = self._nid_dict.get(name)
+        if prev != cluster_nid:
+            from .protocol import uuid_str
+            self.info('Node ID: %s', uuid_str(cluster_nid[1]))
+            self._nid_dict[name] = cluster_nid
+
+    @property
+    def resetNids(self):
+        return self._nid_dict.clear
+
 
 logging = NEOLogger()
 signal.signal(signal.SIGRTMIN, lambda signum, frame: logging.flush())

neo/lib/node.py

 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -118,8 +118,8 @@ class Node(object):
             if connection.isServer():
                 self.setIdentified()
         else:
-            assert force is not None, \
-                attributeTracker.whoSet(self, '_connection')
+            assert force is not None, (conn,
+                attributeTracker.whoSet(self, '_connection'))
             # The test on peer_id is there to protect against buggy nodes.
             # XXX: handler comparison does not cover all cases: there may
             # be a pending handler change, which won't be detected, or a future
@@ -130,6 +130,10 @@ class Node(object):
             # the full-fledged functionality, and it is simpler this way.
             if not force or conn.getPeerId() is not None or \
                type(conn.getHandler()) is not type(connection.getHandler()):
+                # It may also happen in case of a network failure that is only
+                # noticed by the peer. We'd like to accept the new connection
+                # immediately but it's quite complicated. At worst (keepalive
+                # packets dropped), 'conn' will be closed in ~ 1 minute.
                 raise ProtocolError("already connected")
             def on_closed():
                 self._connection = connection
@@ -137,7 +141,6 @@ class Node(object):
                 self.setIdentified()
             conn.setOnClose(on_closed)
             conn.close()
-        assert not connection.isClosed(), connection
         connection.setOnClose(self.onConnectionClosed)
 
     def getConnection(self):

neo/lib/patch.py

 #
-# Copyright (C) 2015-2017 Nexedi SA
+# Copyright (C) 2015-2019 Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License

neo/lib/protocol.py

 
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -22,7 +22,7 @@ from struct import Struct
 # The protocol version must be increased whenever upgrading a node may require
 # to upgrade other nodes. It is encoded as a 4-bytes big-endian integer and
 # the high order byte 0 is different from TLS Handshake (0x16).
-PROTOCOL_VERSION = 4
+PROTOCOL_VERSION = 5
 ENCODED_VERSION = Struct('!L').pack(PROTOCOL_VERSION)
 
 # Avoid memory errors on corrupted data.
@@ -1630,6 +1630,13 @@ class Truncate(Packet):
 
     _answer = Error
 
+class FlushLog(Packet):
+    """
+    Request all nodes to flush their logs.
+
+    :nodes: ctl -> A -> M -> *
+    """
+
 
 _next_code = 0
 def register(request, ignore_when_closed=None):
@@ -1805,6 +1812,8 @@ class Packets(dict):
                     AddObject)
     Truncate = register(
                     Truncate)
+    FlushLog = register(
+                    FlushLog)
 
 def Errors():
     registry_dict = {}

neo/lib/pt.py

 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -15,6 +15,8 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import math
+from collections import defaultdict
+from functools import partial
 from . import logging, protocol
 from .locking import Lock
 from .protocol import uuid_str, CellStates
@@ -256,39 +258,32 @@ class PartitionTable(object):
     def _format(self):
         """Help debugging partition table management.
 
-        Output sample:
-          pt: node 0: S1, R
-          pt: node 1: S2, R
-          pt: node 2: S3, R
-          pt: node 3: S4, R
-          pt: 00: .UU.|U..U|.UU.|U..U|.UU.|U..U|.UU.|U..U|.UU.|U..U|.UU.
-          pt: 11: U..U|.UU.|U..U|.UU.|U..U|.UU.|U..U|.UU.|U..U|.UU.|U..U
-
-        Here, there are 4 nodes in RUNNING state.
-        The first partition has 2 replicas in UP_TO_DATE state, on nodes 1 and
-        2 (nodes 0 and 3 are displayed as unused for that partition by
-        displaying a dot).
-        The first number on the left represents the number of the first
-        partition on the line (here, line length is 11 to keep the docstring
-        width under 80 column).
+        Output sample (np=48, nr=0, just after a 3rd node is added):
+          pt:              10v       20v       30v       40v
+          pt: S1 R U.FOF.U.FOF.U.FOF.U.FOF.U.FOF.U.FOF.U.FOF.U.FOF.
+          pt: S2 R .U.FOF.U.FOF.U.FOF.U.FOF.U.FOF.U.FOF.U.FOF.U.FOF
+          pt: S3 R ..O..O..O..O..O..O..O..O..O..O..O..O..O..O..O..O
+
+        The first line helps to locate a nth partition ('v' is an bottom arrow)
+        and it is omitted when the table has less than 10 partitions.
         """
         node_list = sorted(self.count_dict)
-        result = ['pt: node %u: %s, %s' % (i, uuid_str(node.getUUID()),
-                     protocol.node_state_prefix_dict[node.getState()])
-                  for i, node in enumerate(node_list)]
-        append = result.append
-        line = []
-        max_line_len = 20 # XXX: hardcoded number of partitions per line
-        prefix = 0
-        prefix_len = int(math.ceil(math.log10(self.np)))
-        for offset, row in enumerate(self._formatRows(node_list)):
-            if len(line) == max_line_len:
-                append('pt: %0*u: %s' % (prefix_len, prefix, '|'.join(line)))
-                line = []
-                prefix = offset
-            line.append(row)
-        if line:
-            append('pt: %0*u: %s' % (prefix_len, prefix, '|'.join(line)))
+        if not node_list:
+            return ()
+        cell_state_dict = protocol.cell_state_prefix_dict
+        node_dict = defaultdict(partial(bytearray, '.' * self.np))
+        for offset, row in enumerate(self.partition_list):
+            for cell in row:
+                node_dict[cell.getNode()][offset] = \
+                    cell_state_dict[cell.getState()]
+        n = len(uuid_str(node_list[-1].getUUID()))
+        result = [''.join('%9sv' % x if x else 'pt:' + ' ' * (5 + n)
+                          for x in xrange(0, self.np, 10))
+            ] if self.np > 10 else []
+        result.extend('pt: %-*s %s %s' % (n, uuid_str(node.getUUID()),
+                protocol.node_state_prefix_dict[node.getState()],
+                node_dict[node])
+            for node in node_list)
         return result
 
     def _formatRows(self, node_list):

neo/lib/threaded_app.py

 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -15,9 +15,8 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import thread, threading, weakref
-from . import logging
+from . import debug, logging
 from .app import BaseApplication
-from .debug import register as registerLiveDebugger
 from .dispatcher import Dispatcher
 from .locking import SimpleQueue
 
@@ -28,7 +27,10 @@ class app_set(weakref.WeakSet):
             app.log()
 
 app_set = app_set()
-registerLiveDebugger(app_set.on_log)
+
+def registerLiveDebugger():
+    debug.register(app_set.on_log)
+registerLiveDebugger()
 
 
 class ThreadContainer(threading.local):

neo/lib/util.py

 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -23,6 +23,20 @@ from Queue import deque
 from struct import pack, unpack, Struct
 from time import gmtime
 
+# https://stackoverflow.com/a/6163157
+def nextafter():
+    global nextafter
+    from ctypes import CDLL, util as ctypes_util, c_double
+    from time import time
+    _libm = CDLL(ctypes_util.find_library('m'))
+    nextafter = _libm.nextafter
+    nextafter.restype = c_double
+    nextafter.argtypes = c_double, c_double
+    x = time()
+    y = nextafter(x, float('inf'))
+    assert x < y and (x+y)/2 in (x,y), (x, y)
+nextafter()
+
 TID_LOW_OVERFLOW = 2**32
 TID_LOW_MAX = TID_LOW_OVERFLOW - 1
 SECOND_PER_TID_LOW = 60.0 / TID_LOW_OVERFLOW

neo/master/app.py

 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -18,10 +18,10 @@ import sys
 from collections import defaultdict
 from time import time
 
-from neo.lib import logging
-from neo.lib.app import BaseApplication
+from neo.lib import logging, util
+from neo.lib.app import BaseApplication, buildOptionParser
 from neo.lib.debug import register as registerLiveDebugger
-from neo.lib.protocol import uuid_str, UUID_NAMESPACES, ZERO_TID
+from neo.lib.protocol import UUID_NAMESPACES, ZERO_TID
 from neo.lib.protocol import ClusterStates, NodeStates, NodeTypes, Packets
 from neo.lib.handler import EventHandler
 from neo.lib.connection import ListeningConnection, ClientConnection
@@ -47,6 +47,7 @@ from .transactions import TransactionManager
 from .verification import VerificationManager
 
 
+@buildOptionParser
 class Application(BaseApplication):
     """The master node application."""
     packing = None
@@ -57,7 +58,7 @@ class Application(BaseApplication):
     backup_app = None
     truncate_tid = None
 
-    def uuid(self, uuid):
+    def setUUID(self, uuid):
         node = self.nm.getByUUID(uuid)
         if node is not self._node:
             if node:
@@ -65,33 +66,56 @@ class Application(BaseApplication):
                 if node.isConnected(True):
                     node.getConnection().close()
             self._node.setUUID(uuid)
-    uuid = property(lambda self: self._node.getUUID(), uuid)
+        logging.node(self.name, uuid)
+    uuid = property(lambda self: self._node.getUUID(), setUUID)
 
     @property
     def election(self):
         if self.primary and self.cluster_state == ClusterStates.RECOVERING:
             return self.primary
 
+    @classmethod
+    def _buildOptionParser(cls):
+        _ = cls.option_parser
+        _.description = "NEO Master node"
+        cls.addCommonServerOptions('master', '127.0.0.1:10000', '')
+
+        _ = _.group('master')
+        _.int('r', 'replicas', default=0, help="replicas number")
+        _.int('p', 'partitions', default=100, help="partitions number")
+        _.int('A', 'autostart',
+            help="minimum number of pending storage nodes to automatically"
+                 " start new cluster (to avoid unwanted recreation of the"
+                 " cluster, this should be the total number of storage nodes)")
+        _('C', 'upstream-cluster',
+            help='the name of cluster to backup')
+        _('M', 'upstream-masters', parse=util.parseMasterList,
+            help='list of master nodes in the cluster to backup')
+        _.int('u', 'uuid',
+            help="specify an UUID to use for this process (testing purpose)")
+
     def __init__(self, config):
         super(Application, self).__init__(
-            config.getSSL(), config.getDynamicMasterList())
+            config.get('ssl'), config.get('dynamic_master_list'))
         self.tm = TransactionManager(self.onTransactionCommitted)
 
-        self.name = config.getCluster()
-        self.server = config.getBind()
-        self.autostart = config.getAutostart()
+        self.name = config['cluster']
+        self.server = config['bind']
+        self.autostart = config.get('autostart')
 
         self.storage_ready_dict = {}
         self.storage_starting_set = set()
-        for master_address in config.getMasters():
+        for master_address in config['masters']:
             self.nm.createMaster(address=master_address)
         self._node = self.nm.createMaster(address=self.server,
-                                          uuid=config.getUUID())
+                                          uuid=config.get('uuid'))
+        logging.node(self.name, self.uuid)
 
         logging.debug('IP address is %s, port is %d', *self.server)
 
         # Partition table
-        replicas, partitions = config.getReplicas(), config.getPartitions()
+        replicas = config['replicas']
+        partitions = config['partitions']
         if replicas < 0:
             raise RuntimeError, 'replicas must be a positive integer'
         if partitions <= 0:
@@ -107,13 +131,13 @@ class Application(BaseApplication):
         self._current_manager = None
 
         # backup
-        upstream_cluster = config.getUpstreamCluster()
+        upstream_cluster = config.get('upstream_cluster')
         if upstream_cluster:
             if upstream_cluster == self.name:
                 raise ValueError("upstream cluster name must be"
                                  " different from cluster name")
             self.backup_app = BackupApplication(self, upstream_cluster,
-                                                config.getUpstreamMasters())
+                                                config['upstream_masters'])
 
         self.administration_handler = administration.AdministrationHandler(
             self)
@@ -242,7 +266,6 @@ class Application(BaseApplication):
 
         if self.uuid is None:
             self.uuid = self.getNewUUID(None, self.server, NodeTypes.MASTER)
-            logging.info('My UUID: ' + uuid_str(self.uuid))
         self._node.setRunning()
         self._node.id_timestamp = None
         self.primary = monotonic_time()
@@ -574,3 +597,12 @@ class Application(BaseApplication):
     def getStorageReadySet(self, readiness=float('inf')):
         return {k for k, v in self.storage_ready_dict.iteritems()
                   if v <= readiness}
+
+    def notifyTransactionAborted(self, ttid, uuids):
+        uuid_set = self.getStorageReadySet()
+        uuid_set.intersection_update(uuids)
+        if uuid_set:
+            p = Packets.AbortTransaction(ttid, ())
+            getByUUID = self.nm.getByUUID
+            for uuid in uuid_set:
+                getByUUID(uuid).send(p)

neo/master/backup_app.py

 #
-# Copyright (C) 2012-2017  Nexedi SA
+# Copyright (C) 2012-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -81,6 +81,11 @@ class BackupApplication(object):
         self.nm.close()
         del self.__dict__
 
+    def setUUID(self, uuid):
+        if self.uuid != uuid:
+            self.uuid = uuid
+            logging.info('Upstream Node ID: %s', uuid_str(uuid))
+
     def log(self):
         self.nm.log()
         if self.pt is not None:

neo/master/handlers/__init__.py

 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License

neo/master/handlers/administration.py

 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -46,6 +46,13 @@ class AdministrationHandler(MasterHandler):
         if node is not None:
             self.app.nm.remove(node)
 
+    def flushLog(self, conn):
+        p = Packets.FlushLog()
+        for node in self.app.nm.getConnectedList():
+            c = node.getConnection()
+            c is conn or c.send(p)
+        super(AdministrationHandler, self).flushLog(conn)
+
     def setClusterState(self, conn, state):
         app = self.app
         # check request

neo/master/handlers/backup.py

 #
-# Copyright (C) 2012-2017  Nexedi SA
+# Copyright (C) 2012-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License

neo/master/handlers/client.py

 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -27,7 +27,8 @@ class ClientServiceHandler(MasterHandler):
         app = self.app
         node = app.nm.getByUUID(conn.getUUID())
         assert node is not None, conn
-        app.tm.clientLost(node)
+        for x in app.tm.clientLost(node):
+            app.notifyTransactionAborted(*x)
         node.setUnknown()
         app.broadcastNodesInformation([node])
 
@@ -37,7 +38,7 @@ class ClientServiceHandler(MasterHandler):
         """
         app = self.app
         # Delay new transaction as long as we are waiting for NotifyReady
-        # answers, otherwise we can know if the client is expected to commit
+        # answers, otherwise we can't know if the client is expected to commit
         # the transaction in full to all these storage nodes.
         if app.storage_starting_set:
             raise DelayEvent
@@ -118,12 +119,7 @@ class ClientServiceHandler(MasterHandler):
         app = self.app
         involved = app.tm.abort(tid, conn.getUUID())
         involved.update(uuid_list)
-        involved.intersection_update(app.getStorageReadySet())
-        if involved:
-            p = Packets.AbortTransaction(tid, ())
-            getByUUID = app.nm.getByUUID
-            for involved in involved:
-                getByUUID(involved).send(p)
+        app.notifyTransactionAborted(tid, involved)
 
 
 # like ClientServiceHandler but read-only & only for tid <= backup_tid

neo/master/handlers/identification.py

 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License

neo/master/handlers/master.py

 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License

neo/master/handlers/storage.py

 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License

neo/master/pt.py

 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License

neo/master/recovery.py

 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License

neo/master/transactions.py

 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -444,7 +444,9 @@ class TransactionManager(EventQueue):
     def clientLost(self, node):
         for txn in self._ttid_dict.values():
             if txn.clientLost(node):
-                del self[txn.getTTID()]
+                tid = txn.getTTID()
+                del self[tid]
+                yield tid, txn.getNotificationUUIDList()
 
     def log(self):
         logging.info('Transactions:')

neo/master/verification.py

 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License

neo/neoctl/app.py

 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -14,6 +14,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
+import sys
 from .neoctl import NeoCTL, NotReadyException
 from neo.lib.util import p64, u64, tidFromTime, timeStringFromTID
 from neo.lib.protocol import uuid_str, formatNodeList, \
@@ -38,6 +39,7 @@ action_dict = {
     'kill': 'killNode',
     'prune_orphan': 'pruneOrphan',
     'truncate': 'truncate',
+    'flush_log': 'flushLog',
 }
 
 uuid_int = (lambda ns: lambda uuid:
@@ -252,6 +254,15 @@ class TerminalNeoCTL(object):
                 partition_dict = dict.fromkeys(xrange(np), source)
         self.neoctl.checkReplicas(partition_dict, min_tid, max_tid)
 
+    def flushLog(self, params):
+        """
+          Ask all nodes in the cluster to flush their logs.
+
+          If there are backup clusters, only their primary masters flush.
+        """
+        assert not params
+        self.neoctl.flushLog()
+
 class Application(object):
     """The storage node application."""
 
@@ -266,18 +277,18 @@ class Application(object):
         # state (RUNNING, DOWN...) and modify the partition if asked
         # set cluster name [shutdown|operational] : either shutdown the
         # cluster or mark it as operational
+        if not args:
+            return self.usage()
         current_action = action_dict
         level = 0
-        while current_action is not None and \
-              level < len(args) and \
+        try:
+            while level < len(args) and \
                   isinstance(current_action, dict):
-            current_action = current_action.get(args[level])
+                current_action = current_action[args[level]]
                 level += 1
-        action = None
-        if isinstance(current_action, basestring):
-            action = getattr(self.neoctl, current_action, None)
-        if action is None:
-            return self.usage('unknown command')
+        except KeyError:
+            sys.exit('invalid command: ' + ' '.join(args))
+        action = getattr(self.neoctl, current_action)
         try:
             return action(args[level:])
         except NotReadyException, message:
@@ -312,8 +323,8 @@ class Application(object):
                                for x in docstring_line_list])
         return '\n'.join(result)
 
-    def usage(self, message):
-        output_list = (message, 'Available commands:', self._usage(action_dict),
+    def usage(self):
+        output_list = ('Available commands:', self._usage(action_dict),
             "TID arguments can be either integers or timestamps as floats,"
             " e.g. '257684787499560686', '0x3937af2eeeeeeee' or '1325421296.'"
             " for 2012-01-01 12:34:56 UTC")

neo/neoctl/handler.py

 #
-# Copyright (C) 2009-2017  Nexedi SA
+# Copyright (C) 2009-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License

neo/neoctl/neoctl.py

 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -14,7 +14,9 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-from neo.lib.app import BaseApplication
+import argparse
+from neo.lib import util
+from neo.lib.app import BaseApplication, buildOptionParser
 from neo.lib.connection import ClientConnection, ConnectionClosed
 from neo.lib.protocol import ClusterStates, NodeStates, ErrorCodes, Packets
 from .handler import CommandEventHandler
@@ -22,11 +24,24 @@ from .handler import CommandEventHandler
 class NotReadyException(Exception):
     pass
 
+@buildOptionParser
 class NeoCTL(BaseApplication):
 
     connection = None
     connected = False
 
+    @classmethod
+    def _buildOptionParser(cls):
+        # XXX: Use argparse sub-commands.
+        parser = cls.option_parser
+        parser.description = "NEO Control node"
+        parser('a', 'address', default='127.0.0.1:9999',
+            parse=lambda x: util.parseNodeAddress(x, 9999),
+            help="address of an admin node")
+        parser.argument('cmd', nargs=argparse.REMAINDER,
+            help="command to execute; if not supplied,"
+                 " the list of available commands is displayed")
+
     def __init__(self, address, **kw):
         super(NeoCTL, self).__init__(**kw)
         self.server = self.nm.createAdmin(address=address)
@@ -189,3 +204,9 @@ class NeoCTL(BaseApplication):
         if response[0] != Packets.Error or response[1] != ErrorCodes.ACK:
             raise RuntimeError(response)
         return response[2]
+
+    def flushLog(self):
+        conn = self.__getConnection()
+        conn.send(Packets.FlushLog())
+        while conn.pending():
+            self.em.poll(1)

neo/scripts/neoadmin.py

@@ -2,7 +2,7 @@
 #
 # neoadmin - run an administrator  node of NEO
 #
-# Copyright (C) 2009-2017  Nexedi SA
+# Copyright (C) 2009-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -18,27 +18,15 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from neo.lib import logging
-from neo.lib.config import getServerOptionParser, ConfigurationManager
-
-parser = getServerOptionParser()
-parser.add_option('-u', '--uuid', help='specify an UUID to use for this ' \
-                  'process')
-
-defaults = dict(
-    bind = '127.0.0.1:9999',
-    masters = '127.0.0.1:10000',
-)
 
 def main(args=None):
-    # build configuration dict from command line options
-    (options, args) = parser.parse_args(args=args)
-    config = ConfigurationManager(defaults, options, 'admin')
+    from neo.admin.app import Application
+    config = Application.option_parser.parse(args)
 
     # setup custom logging
-    logging.setup(config.getLogfile())
+    logging.setup(config.get('logfile'))
 
     # and then, load and run the application
-    from neo.admin.app import Application
     app = Application(config)
     app.run()
 

neo/scripts/neoctl.py

 #!/usr/bin/env python
 #
-# neoadmin - run an administrator node of NEO
+# neoctl - command-line interface to an administrator node of NEO
 #
-# Copyright (C) 2009-2017  Nexedi SA
+# Copyright (C) 2009-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -18,30 +18,22 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from neo.lib import logging
-from neo.lib.config import getOptionParser
-from neo.lib.util import parseNodeAddress
-
-parser = getOptionParser()
-parser.add_option('-a', '--address', help = 'specify the address (ip:port) ' \
-    'of an admin node', default = '127.0.0.1:9999')
 
 def main(args=None):
-    (options, args) = parser.parse_args(args=args)
-    if options.address is not None:
-        address = parseNodeAddress(options.address, 9999)
-    else:
-        address = ('127.0.0.1', 9999)
+    from neo.neoctl.neoctl import NeoCTL
+    config = NeoCTL.option_parser.parse(args)
 
-    if options.logfile:
+    logfile = config.get('logfile')
+    if logfile:
         # Contrary to daemons, we log everything to disk automatically
         # because a user using -l option here:
         # - is certainly debugging an issue and wants everything,
         # - would not have to time to send SIGRTMIN before neoctl exits.
         logging.backlog(None)
-        logging.setup(options.logfile)
-    from neo.neoctl.app import Application
+        logging.setup(logfile)
 
-    ssl = options.ca, options.cert, options.key
-    r = Application(address, ssl=ssl if any(ssl) else None).execute(args)
+    from neo.neoctl.app import Application
+    app = Application(config['address'], ssl=config.get('ssl'))
+    r = app.execute(config['cmd'])
     if r is not None:
         print r

neo/scripts/neomaster.py

@@ -2,7 +2,7 @@
 #
 # neomaster - run a master node of NEO
 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -18,38 +18,14 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from neo.lib import logging
-from neo.lib.config import getServerOptionParser, ConfigurationManager
-
-parser = getServerOptionParser()
-parser.add_option('-u', '--uuid', help='the node UUID (testing purpose)')
-parser.add_option('-r', '--replicas', help = 'replicas number')
-parser.add_option('-p', '--partitions', help = 'partitions number')
-parser.add_option('-A', '--autostart',
-    help='minimum number of pending storage nodes to automatically start'
-         ' new cluster (to avoid unwanted recreation of the cluster,'
-         ' this should be the total number of storage nodes)')
-parser.add_option('-C', '--upstream-cluster',
-    help='the name of cluster to backup')
-parser.add_option('-M', '--upstream-masters',
-    help='list of master nodes in cluster to backup')
-
-defaults = dict(
-    bind = '127.0.0.1:10000',
-    masters = '',
-    replicas = 0,
-    partitions = 100,
-)
 
 def main(args=None):
-    # build configuration dict from command line options
-    (options, args) = parser.parse_args(args=args)
-    config = ConfigurationManager(defaults, options, 'master')
+    from neo.master.app import Application
+    config = Application.option_parser.parse(args)
 
     # setup custom logging
-    logging.setup(config.getLogfile())
+    logging.setup(config.get('logfile'))
 
     # and then, load and run the application
-    from neo.master.app import Application
     app = Application(config)
     app.run()
-

neo/scripts/neomigrate.py

 #!/usr/bin/env python
 #
-# neomaster - run a master node of NEO
+# neomigrate - import/export data between NEO and a FileStorage
 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -17,51 +17,62 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-from neo.lib.config import getOptionParser
+from __future__ import print_function
 import time
 import os
+from neo.lib.app import buildOptionParser
 
-# register options
-parser = getOptionParser()
-parser.add_option('-s', '--source', help='the source database')
-parser.add_option('-d', '--destination', help='the destination database')
-parser.add_option('-c', '--cluster', help='the NEO cluster name')
+import_warning = (
+    "WARNING: This is not the recommended way to import data to NEO:"
+    " you should use the Importer backend instead.\n"
+    "NEO also does not implement IStorageRestoreable interface, which"
+    " means that undo information is not preserved when using this tool:"
+    " conflict resolution could happen when undoing an old transaction."
+)
 
-def main(args=None):
-    # parse options
-    (options, args) = parser.parse_args(args=args)
-    source = options.source or None
-    destination = options.destination or None
-    cluster = options.cluster or None
+@buildOptionParser
+class NEOMigrate(object):
+
+    from neo.lib.config import OptionList
+
+    @classmethod
+    def _buildOptionParser(cls):
+        parser = cls.option_parser
+        parser.description = "NEO <-> FileStorage conversion tool"
+        parser('c', 'cluster', required=True, help='the NEO cluster name')
+        parser.bool('q', 'quiet', help='print nothing to standard output')
+        parser.argument('source', help='the source database')
+        parser.argument('destination', help='the destination database')
 
-    # check options
-    if source is None or destination is None:
-        raise RuntimeError('Source and destination databases must be supplied')
-    if cluster is None:
-        raise RuntimeError('The NEO cluster name must be supplied')
+    def __init__(self, config):
+        self.name = config.pop('cluster')
+        self.source = config.pop('source')
+        self.destination = config.pop('destination')
+        self.quiet = config.pop('quiet', False)
 
-    # open storages
         from ZODB.FileStorage import FileStorage
         from neo.client.Storage import Storage as NEOStorage
-    if os.path.exists(source):
-        print("WARNING: This is not the recommended way to import data to NEO:"
-              " you should use the Importer backend instead.\n"
-              "NEO also does not implement IStorageRestoreable interface,"
-              " which means that undo information is not preserved when using"
-              " this tool: conflict resolution could happen when undoing an"
-              " old transaction.")
-        src = FileStorage(file_name=source, read_only=True)
-        dst = NEOStorage(master_nodes=destination, name=cluster,
-                         logfile=options.logfile)
+        if os.path.exists(self.source):
+            if not self.quiet:
+                print(import_warning)
+            self.src = FileStorage(file_name=self.source, read_only=True)
+            self.dst = NEOStorage(master_nodes=self.destination, name=self.name,
+                                  **config)
         else:
-        src = NEOStorage(master_nodes=source, name=cluster,
-                         logfile=options.logfile, read_only=True)
-        dst = FileStorage(file_name=destination)
+            self.src = NEOStorage(master_nodes=self.source, name=self.name,
+                                  read_only=True, **config)
+            self.dst = FileStorage(file_name=self.destination)
 
-    # do the job
-    print "Migrating from %s to %s" % (source, destination)
+    def run(self):
+        if not self.quiet:
+            print("Migrating from %s to %s" % (self.source, self.destination))
             start = time.time()
-    dst.copyTransactionsFrom(src)
+        self.dst.copyTransactionsFrom(self.src)
+        if not self.quiet:
             elapsed = time.time() - start
-    print "Migration done in %3.5f" % (elapsed, )
+            print("Migration done in %3.5f" % elapsed)
+
 
+def main(args=None):
+    config = NEOMigrate.option_parser.parse(args)
+    NEOMigrate(config).run()

neo/scripts/neostorage.py

@@ -2,7 +2,7 @@
 #
 # neostorage - run a storage node of NEO
 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -18,49 +18,15 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from neo.lib import logging
-from neo.lib.config import getServerOptionParser, ConfigurationManager
-
-
-parser = getServerOptionParser()
-parser.add_option('-u', '--uuid', help='specify an UUID to use for this ' \
-                  'process. Previously assigned UUID takes precedence (ie ' \
-                  'you should always use --reset with this switch)')
-parser.add_option('-a', '--adapter', help = 'database adapter to use')
-parser.add_option('-d', '--database', help = 'database connections string')
-parser.add_option('-e', '--engine', help = 'database engine')
-parser.add_option('-w', '--wait', help='seconds to wait for backend to be '
-    'available, before erroring-out (-1 = infinite)', type='float', default=0)
-parser.add_option('--dedup', action='store_true',
-                  help = 'enable deduplication of data when setting'
-                         ' up a new storage node (for RocksDB, check'
-                         ' https://github.com/facebook/mysql-5.6/issues/702)')
-parser.add_option('--disable-drop-partitions', action='store_true',
-                  help = 'do not delete data of discarded cells, which is'
-                         ' useful for big databases because the current'
-                         ' implementation is inefficient (this option should'
-                         ' disappear in the future)')
-parser.add_option('--reset', action='store_true',
-                  help='remove an existing database if any, and exit')
-
-defaults = dict(
-    bind = '127.0.0.1',
-    masters = '127.0.0.1:10000',
-    adapter = 'MySQL',
-)
 
 def main(args=None):
-    # TODO: Forbid using "reset" along with any unneeded argument.
-    #       "reset" is too dangerous to let user a chance of accidentally
-    #       letting it slip through in a long option list.
-    #       We should drop support configuration files to make such check useful.
-    (options, args) = parser.parse_args(args=args)
-    config = ConfigurationManager(defaults, options, 'storage')
+    from neo.storage.app import Application
+    config = Application.option_parser.parse(args)
 
     # setup custom logging
-    logging.setup(config.getLogfile())
+    logging.setup(config.get('logfile'))
 
     # and then, load and run the application
-    from neo.storage.app import Application
     app = Application(config)
-    if not config.getReset():
+    if not config.get('reset'):
         app.run()

neo/scripts/runner.py

 #!/usr/bin/env python
 #
-# Copyright (C) 2009-2017  Nexedi SA
+# Copyright (C) 2009-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -15,6 +15,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
+import argparse
 import traceback
 import unittest
 import time
@@ -274,41 +275,43 @@ class NeoTestRunner(unittest.TextTestResult):
 class TestRunner(BenchmarkRunner):
 
     def add_options(self, parser):
-        parser.add_option('-c', '--coverage', action='store_true',
+        x = parser.add_mutually_exclusive_group().add_argument
+        x('-c', '--coverage', action='store_true',
             help='Enable coverage')
-        parser.add_option('-C', '--cov-unit', action='store_true',
+        x('-C', '--cov-unit', action='store_true',
             help='Same as -c but output 1 file per test,'
                  ' in the temporary test directory')
-        parser.add_option('-L', '--log', action='store_true',
+        _ = parser.add_argument
+        _('-L', '--log', action='store_true',
             help='Force all logs to be emitted immediately and keep'
                  ' packet body in logs of successful threaded tests')
-        parser.add_option('-l', '--loop', type='int', default=1,
+        _('-l', '--loop', type=int, default=1,
             help='Repeat tests several times')
-        parser.add_option('-f', '--functional', action='store_true',
+        _('-f', '--functional', action='store_true',
             help='Functional tests')
-        parser.add_option('-s', '--stop-on-error', action='store_false',
-            dest='stop_on_success',
+        x = parser.add_mutually_exclusive_group().add_argument
+        x('-s', '--stop-on-error', action='store_false',
+            dest='stop_on_success', default=None,
             help='Continue as long as tests pass successfully.'
                  ' It is usually combined with --loop, to check that tests'
                  ' do not fail randomly.')
-        parser.add_option('-S', '--stop-on-success', action='store_true',
+        x('-S', '--stop-on-success', action='store_true', default=None,
             help='Opposite of --stop-on-error: stop as soon as a test'
                  ' passes. Details about errors are not printed at exit.')
-        parser.add_option('-r', '--readable-tid', action='store_true',
+        _('-r', '--readable-tid', action='store_true',
             help='Change master behaviour to generate readable TIDs for easier'
                  ' debugging (rather than from current time).')
-        parser.add_option('-u', '--unit', action='store_true',
+        _('-u', '--unit', action='store_true',
             help='Unit & threaded tests')
-        parser.add_option('-z', '--zodb', action='store_true',
+        _('-z', '--zodb', action='store_true',
             help='ZODB test suite running on a NEO')
-        parser.add_option('-v', '--verbose', action='store_true',
+        _('-v', '--verbose', action='store_true',
             help='Verbose output')
-        parser.usage += " [[!] module [test...]]"
-        parser.format_epilog = lambda _: """
-Positional:
-  Filter by given module/test. These arguments are shell patterns.
-  This implies -ufz if none of this option is passed.
-
+        _('only', nargs=argparse.REMAINDER, metavar='[[!] module [test...]]',
+            help="Filter by given module/test. These arguments are shell"
+                 " patterns. This implies -ufz if none of this option is"
+                 " passed.")
+        parser.epilog = """
 Environment Variables:
   NEO_TESTS_ADAPTER           Default is SQLite for threaded clusters,
                               MySQL otherwise.
@@ -329,25 +332,23 @@ Environment Variables:
     NEO_TEST_ZODB_STORAGES    default: 1
 """ % neo_tests__dict__
 
-    def load_options(self, options, args):
-        if options.coverage and options.cov_unit:
-            sys.exit('-c conflicts with -C')
-        if not (options.unit or options.functional or options.zodb):
-            if not args:
+    def load_options(self, args):
+        if not (args.unit or args.functional or args.zodb):
+            if not args.only:
                 sys.exit('Nothing to run, please give one of -f, -u, -z')
-            options.unit = options.functional = options.zodb = True
+            args.unit = args.functional = args.zodb = True
         return dict(
-            log = options.log,
-            loop = options.loop,
-            unit = options.unit,
-            functional = options.functional,
-            zodb = options.zodb,
-            verbosity = 2 if options.verbose else 1,
-            coverage = options.coverage,
-            cov_unit = options.cov_unit,
-            only = args,
-            stop_on_success = options.stop_on_success,
-            readable_tid = options.readable_tid,
+            log = args.log,
+            loop = args.loop,
+            unit = args.unit,
+            functional = args.functional,
+            zodb = args.zodb,
+            verbosity = 2 if args.verbose else 1,
+            coverage = args.coverage,
+            cov_unit = args.cov_unit,
+            only = args.only,
+            stop_on_success = args.stop_on_success,
+            readable_tid = args.readable_tid,
         )
 
     def start(self):

neo/scripts/simple.py

 #!/usr/bin/env python
 #
-# Copyright (C) 2011-2017  Nexedi SA
+# Copyright (C) 2011-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -15,9 +15,8 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-import inspect, random
+import argparse, inspect, random
 from logging import getLogger, INFO
-from optparse import OptionParser
 from neo.lib import logging
 from neo.tests import functional
 logging.backlog()
@@ -26,9 +25,9 @@ del logging.default_root_handler.handle
 def main():
     args, _, _, defaults = inspect.getargspec(functional.NEOCluster.__init__)
     option_list = zip(args[-len(defaults):], defaults)
-    parser = OptionParser(usage="%prog [options] [db...]",
+    parser = argparse.ArgumentParser(
         description="Quickly setup a simple NEO cluster for testing purpose.")
-    parser.add_option('--seed', help="settings like node ports/uuids and"
+    parser.add_argument('--seed', help="settings like node ports/uuids and"
         " cluster name are random: pass any string to initialize the RNG")
     defaults = {}
     for option, default in sorted(option_list):
@@ -39,14 +38,15 @@ def main():
         elif default is not None:
             defaults[option] = default
             if isinstance(default, int):
-                kw['type'] = "int"
-        parser.add_option('--' + option, **kw)
+                kw['type'] = int
+        parser.add_argument('--' + option, **kw)
     parser.set_defaults(**defaults)
-    options, args = parser.parse_args()
-    if options.seed:
-        functional.random = random.Random(options.seed)
+    parser.add_argument('db', nargs='+')
+    args = parser.parse_args()
+    if args.seed:
+        functional.random = random.Random(args.seed)
     getLogger().setLevel(INFO)
-    cluster = functional.NEOCluster(args, **{x: getattr(options, x)
+    cluster = functional.NEOCluster(args.db, **{x: getattr(args, x)
                                                 for x, _ in option_list})
     try:
         cluster.run()

neo/storage/app.py

 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -18,44 +18,88 @@ import sys
 from collections import deque
 
 from neo.lib import logging
-from neo.lib.app import BaseApplication
-from neo.lib.protocol import uuid_str, \
-    CellStates, ClusterStates, NodeTypes, Packets
+from neo.lib.app import BaseApplication, buildOptionParser
+from neo.lib.protocol import CellStates, ClusterStates, NodeTypes, Packets
 from neo.lib.connection import ListeningConnection
 from neo.lib.exception import StoppedOperation, PrimaryFailure
 from neo.lib.pt import PartitionTable
 from neo.lib.util import dump
 from neo.lib.bootstrap import BootstrapManager
 from .checker import Checker
-from .database import buildDatabaseManager
+from .database import buildDatabaseManager, DATABASE_MANAGER_DICT
 from .handlers import identification, initialization, master
 from .replicator import Replicator
 from .transactions import TransactionManager
 
 from neo.lib.debug import register as registerLiveDebugger
 
+option_defaults = {
+  'adapter': 'MySQL',
+  'wait': 0,
+}
+assert option_defaults['adapter'] in DATABASE_MANAGER_DICT
+
+@buildOptionParser
 class Application(BaseApplication):
     """The storage node application."""
 
     checker = replicator = tm = None
 
+    @classmethod
+    def _buildOptionParser(cls):
+        parser = cls.option_parser
+        parser.description = "NEO Storage node"
+        cls.addCommonServerOptions('storage', '127.0.0.1')
+
+        _ = parser.group('storage')
+        _('a', 'adapter', choices=sorted(DATABASE_MANAGER_DICT),
+            help="database adapter to use")
+        _('d', 'database', required=True,
+            help="database connections string")
+        _.float('w', 'wait',
+            help="seconds to wait for backend to be available,"
+                 " before erroring-out (-1 = infinite)")
+        _.bool('disable-drop-partitions',
+            help="do not delete data of discarded cells, which is useful for"
+                 " big databases because the current implementation is"
+                 " inefficient (this option should disappear in the future)")
+
+        _ = parser.group('database creation')
+        _.int('u', 'uuid',
+            help="specify an UUID to use for this process. Previously"
+                 " assigned UUID takes precedence (i.e. you should"
+                 " always use reset with this switch)")
+        _('e', 'engine', help="database engine (MySQL only)")
+        _.bool('dedup',
+            help="enable deduplication of data"
+                 " when setting up a new storage node")
+        # TODO: Forbid using "reset" along with any unneeded argument.
+        #       "reset" is too dangerous to let user a chance of accidentally
+        #       letting it slip through in a long option list.
+        #       It should even be forbidden in configuration files.
+        _.bool('reset',
+            help="remove an existing database if any, and exit")
+
+        parser.set_defaults(**option_defaults)
+
     def __init__(self, config):
         super(Application, self).__init__(
-            config.getSSL(), config.getDynamicMasterList())
+            config.get('ssl'), config.get('dynamic_master_list'))
         # set the cluster name
-        self.name = config.getCluster()
+        self.name = config['cluster']
 
-        self.dm = buildDatabaseManager(config.getAdapter(),
-            (config.getDatabase(), config.getEngine(), config.getWait()),
+        self.dm = buildDatabaseManager(config['adapter'],
+            (config['database'], config.get('engine'), config['wait']),
         )
-        self.disable_drop_partitions = config.getDisableDropPartitions()
+        self.disable_drop_partitions = config.get('disable_drop_partitions',
+                                                  False)
 
         # load master nodes
-        for master_address in config.getMasters():
+        for master_address in config['masters']:
             self.nm.createMaster(address=master_address)
 
         # set the bind address
-        self.server = config.getBind()
+        self.server = config['bind']
         logging.debug('IP address is %s, port is %d', *self.server)
 
         # The partition table is initialized after getting the number of
@@ -69,13 +113,15 @@ class Application(BaseApplication):
         # operation related data
         self.operational = False
 
-        self.dm.setup(reset=config.getReset(), dedup=config.getDedup())
+        self.dm.setup(reset=config.get('reset', False),
+                      dedup=config.get('dedup', False))
         self.loadConfiguration()
         self.devpath = self.dm.getTopologyPath()
 
         # force node uuid from command line argument, for testing purpose only
-        if config.getUUID() is not None:
-            self.uuid = config.getUUID()
+        if 'uuid' in config:
+            self.uuid = config['uuid']
+            logging.node(self.name, self.uuid)
 
         registerLiveDebugger(on_log=self.log)
 
@@ -111,6 +157,7 @@ class Application(BaseApplication):
 
         # load configuration
         self.uuid = dm.getUUID()
+        logging.node(self.name, self.uuid)
         num_partitions = dm.getNumPartitions()
         num_replicas = dm.getNumReplicas()
         ptid = dm.getPTID()
@@ -123,7 +170,6 @@ class Application(BaseApplication):
             self.pt = PartitionTable(num_partitions, num_replicas)
 
         logging.info('Configuration loaded:')
-        logging.info('UUID      : %s', uuid_str(self.uuid))
         logging.info('PTID      : %s', dump(ptid))
         logging.info('Name      : %s', self.name)
         logging.info('Partitions: %s', num_partitions)
@@ -208,9 +254,7 @@ class Application(BaseApplication):
                                      self.devpath)
         self.master_node, self.master_conn, num_partitions, num_replicas = \
             bootstrap.getPrimaryConnection()
-        uuid = self.uuid
-        logging.info('I am %s', uuid_str(uuid))
-        self.dm.setUUID(uuid)
+        self.dm.setUUID(self.uuid)
 
         # Reload a partition table from the database. This is necessary
         # when a previous primary master died while sending a partition

neo/storage/checker.py

 #
-# Copyright (C) 2012-2017  Nexedi SA
+# Copyright (C) 2012-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License

neo/storage/database/__init__.py

 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License

neo/storage/database/importer.py

 #
-# Copyright (C) 2014-2017  Nexedi SA
+# Copyright (C) 2014-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -31,6 +31,7 @@ except ImportError:
     _protocol = 1
 from ZODB.FileStorage import FileStorage
 
+from ..app import option_defaults
 from . import buildDatabaseManager, DatabaseFailure
 from .manager import DatabaseManager
 from neo.lib import compress, logging, patch, util
@@ -359,8 +360,7 @@ class ImporterDatabaseManager(DatabaseManager):
         config = SafeConfigParser()
         config.read(os.path.expanduser(database))
         sections = config.sections()
-        # XXX: defaults copy & pasted from elsewhere - refactoring needed
-        main = self._conf = {'adapter': 'MySQL', 'wait': 0}
+        main = self._conf = option_defaults.copy()
         main.update(config.items(sections.pop(0)))
         self.zodb = [(x, dict(config.items(x))) for x in sections]
         x = main.get('compress', 'true')

neo/storage/database/manager.py

 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License

neo/storage/database/mysqldb.py

 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License

neo/storage/database/sqlite.py

 #
-# Copyright (C) 2012-2017  Nexedi SA
+# Copyright (C) 2012-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -179,7 +179,8 @@ class SQLiteDatabaseManager(DatabaseManager):
                  description BLOB NOT NULL,
                  ext BLOB NOT NULL,
                  ttid INTEGER NOT NULL,
-                 PRIMARY KEY (partition, tid))
+                 PRIMARY KEY (partition, tid)
+            ) WITHOUT ROWID
             """
 
         # The table "obj" stores committed object metadata.
@@ -189,7 +190,8 @@ class SQLiteDatabaseManager(DatabaseManager):
                  tid INTEGER NOT NULL,
                  data_id INTEGER,
                  value_tid INTEGER,
-                 PRIMARY KEY (partition, oid, tid))
+                 PRIMARY KEY (partition, oid, tid)
+            ) WITHOUT ROWID
             """
         index_dict['obj'] = (
             "CREATE INDEX %s ON %s(partition, tid, oid)",

neo/storage/handlers/__init__.py

 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -62,7 +62,8 @@ class BaseMasterHandler(BaseHandler):
             elif node_type == NodeTypes.CLIENT and state != NodeStates.RUNNING:
                 logging.info('Notified of non-running client, abort (%s)',
                         uuid_str(uuid))
-                self.app.tm.abortFor(uuid)
+                # See comment in ClientOperationHandler.connectionClosed
+                self.app.tm.abortFor(uuid, even_if_voted=True)
 
     def notifyPartitionChanges(self, conn, ptid, cell_list):
         """This is very similar to Send Partition Table, except that

neo/storage/handlers/client.py

 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -18,7 +18,7 @@ from neo.lib import logging
 from neo.lib.handler import DelayEvent
 from neo.lib.util import dump, makeChecksum, add64
 from neo.lib.protocol import Packets, Errors, NonReadableCell, ProtocolError, \
-    ZERO_HASH, INVALID_PARTITION
+    ZERO_HASH, ZERO_TID, INVALID_PARTITION
 from ..transactions import ConflictError, NotRegisteredError
 from . import BaseHandler
 import time
@@ -29,6 +29,24 @@ SLOW_STORE = 2
 
 class ClientOperationHandler(BaseHandler):
 
+    def connectionClosed(self, conn):
+        logging.debug('connection closed for %r', conn)
+        app = self.app
+        if app.operational:
+            # Even if in most cases, abortFor is called from both this method
+            # and BaseMasterHandler.notifyPartitionChanges (especially since
+            # storage nodes disconnects unknown clients on their own), these 2
+            # handlers also cover distinct scenarios, so neither of them is
+            # redundant:
+            # - A client node may have network issues with this particular
+            #   storage node and remain RUNNING: we may still be involved in
+            #   the second phase so we only abort non-voted transactions here.
+            #   By not taking part to any further deadlock avoidance,
+            #   not releasing write-locks now would lead to a deadlock.
+            # - A client node may be disconnected from the master, whereas
+            #   there are still voted (and not locked) transactions to abort.
+            app.tm.abortFor(conn.getUUID())
+
     def askTransactionInformation(self, conn, tid):
         t = self.app.dm.getTransaction(tid)
         if t is None:
@@ -72,26 +90,27 @@ class ClientOperationHandler(BaseHandler):
     def _askStoreObject(self, conn, oid, serial, compression, checksum, data,
             data_serial, ttid, request_time):
         try:
-            self.app.tm.storeObject(ttid, serial, oid, compression,
+            locked = self.app.tm.storeObject(ttid, serial, oid, compression,
                     checksum, data, data_serial)
         except ConflictError, err:
             # resolvable or not
-            conn.answer(Packets.AnswerStoreObject(err.tid))
-            return
+            locked = err.tid
         except NonReadableCell:
             logging.info('Ignore store of %s:%s by %s: unassigned partition',
                 dump(oid), dump(serial), dump(ttid))
+            locked = ZERO_TID
         except NotRegisteredError:
             # transaction was aborted, cancel this event
             logging.info('Forget store of %s:%s by %s delayed by %s',
                     dump(oid), dump(serial), dump(ttid),
                     dump(self.app.tm.getLockingTID(oid)))
+            locked = ZERO_TID
         else:
             if request_time and SLOW_STORE is not None:
                 duration = time.time() - request_time
                 if duration > SLOW_STORE:
                     logging.info('StoreObject delay: %.02fs', duration)
-        conn.answer(Packets.AnswerStoreObject(None))
+        conn.answer(Packets.AnswerStoreObject(locked))
 
     def askStoreObject(self, conn, oid, serial,
             compression, checksum, data, data_serial, ttid):
@@ -198,25 +217,26 @@ class ClientOperationHandler(BaseHandler):
 
     def _askCheckCurrentSerial(self, conn, ttid, oid, serial, request_time):
         try:
-            self.app.tm.checkCurrentSerial(ttid, oid, serial)
+            locked = self.app.tm.checkCurrentSerial(ttid, oid, serial)
         except ConflictError, err:
             # resolvable or not
-            conn.answer(Packets.AnswerCheckCurrentSerial(err.tid))
-            return
+            locked = err.tid
         except NonReadableCell:
             logging.info('Ignore check of %s:%s by %s: unassigned partition',
                 dump(oid), dump(serial), dump(ttid))
+            locked = ZERO_TID
         except NotRegisteredError:
             # transaction was aborted, cancel this event
             logging.info('Forget serial check of %s:%s by %s delayed by %s',
                 dump(oid), dump(serial), dump(ttid),
                 dump(self.app.tm.getLockingTID(oid)))
+            locked = ZERO_TID
         else:
             if request_time and SLOW_STORE is not None:
                 duration = time.time() - request_time
                 if duration > SLOW_STORE:
                     logging.info('CheckCurrentSerial delay: %.02fs', duration)
-        conn.answer(Packets.AnswerCheckCurrentSerial(None))
+        conn.answer(Packets.AnswerCheckCurrentSerial(locked))
 
 
 # like ClientOperationHandler but read-only & only for tid <= backup_tid

neo/storage/handlers/identification.py

 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -53,16 +53,17 @@ class IdentificationHandler(EventHandler):
                     handler = ClientReadOnlyOperationHandler
                 else:
                     handler = ClientOperationHandler
-                assert not node.isConnected(), node
                 assert node.isRunning(), node
+                force = False
             elif node_type == NodeTypes.STORAGE:
                 handler = StorageOperationHandler
+                force = app.uuid < uuid
             else:
                 raise ProtocolError('reject non-client-or-storage node')
             # apply the handler and set up the connection
             handler = handler(self.app)
             conn.setHandler(handler)
-            node.setConnection(conn, app.uuid < uuid)
+            node.setConnection(conn, force)
         # accept the identification and trigger an event
         conn.answer(Packets.AcceptIdentification(NodeTypes.STORAGE, uuid and
             app.uuid, app.pt.getPartitions(), app.pt.getReplicas(), uuid))

neo/storage/handlers/initialization.py

 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License

neo/storage/handlers/master.py

 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License

neo/storage/handlers/storage.py

 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License

neo/storage/replicator.py

 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License

neo/storage/shared_queue.py

 #
-# Copyright (C) 2018  Nexedi SA
+# Copyright (C) 2018-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License

neo/tests/__init__.py

 #
-# Copyright (C) 2009-2017  Nexedi SA
+# Copyright (C) 2009-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -28,6 +28,7 @@ import weakref
 import MySQLdb
 import transaction
 
+from contextlib import contextmanager
 from ConfigParser import SafeConfigParser
 from cStringIO import StringIO
 try:
@@ -85,8 +86,6 @@ SSL = SSL + "ca.crt", SSL + "node.crt", SSL + "node.key"
 logging.default_root_handler.handle = lambda record: None
 
 debug.register()
-# prevent "signal only works in main thread" errors in subprocesses
-debug.register = lambda on_log=None: None
 
 def mockDefaultValue(name, function):
     def method(self, *args, **kw):
@@ -215,6 +214,14 @@ class NeoTestBase(unittest.TestCase):
             expected if isinstance(expected, str) else '|'.join(expected),
             '|'.join(pt._formatRows(sorted(pt.count_dict, key=key))))
 
+    @contextmanager
+    def expectedFailure(self, exception=AssertionError, regex=None):
+        with self.assertRaisesRegexp(exception, regex) as cm:
+            yield
+            raise _UnexpectedSuccess
+        # XXX: passing sys.exc_info() causes deadlocks
+        raise _ExpectedFailure((type(cm.exception), None, None))
+
 class NeoUnitTestBase(NeoTestBase):
     """ Base class for neo tests, implements common checks """
 
@@ -255,14 +262,14 @@ class NeoUnitTestBase(NeoTestBase):
         assert master_number >= 1 and master_number <= 10
         masters = ([(self.local_ip, 10010 + i)
                     for i in xrange(master_number)])
-        return Mock({
-                'getCluster': cluster,
-                'getBind': masters[0],
-                'getMasters': masters,
-                'getReplicas': replicas,
-                'getPartitions': partitions,
-                'getUUID': uuid,
-        })
+        return {
+                'cluster': cluster,
+                'bind': masters[0],
+                'masters': masters,
+                'replicas': replicas,
+                'partitions': partitions,
+                'uuid': uuid,
+        }
 
     def getStorageConfiguration(self, cluster='main', master_number=2,
             index=0, prefix=DB_PREFIX, uuid=None):
@@ -277,15 +284,15 @@ class NeoUnitTestBase(NeoTestBase):
             db = os.path.join(getTempDirectory(), 'test_neo%s.sqlite' % index)
         else:
             assert False, adapter
-        return Mock({
-                'getCluster': cluster,
-                'getBind': (masters[0], 10020 + index),
-                'getMasters': masters,
-                'getDatabase': db,
-                'getUUID': uuid,
-                'getReset': False,
-                'getAdapter': adapter,
-        })
+        return {
+                'cluster': cluster,
+                'bind': (masters[0], 10020 + index),
+                'masters': masters,
+                'database': db,
+                'uuid': uuid,
+                'adapter': adapter,
+                'wait': 0,
+        }
 
     def getNewUUID(self, node_type):
         """

neo/tests/benchmark.py

 from __future__ import print_function
+import argparse
 import sys
 import smtplib
-import optparse
 import platform
 import datetime
 from email.mime.multipart import MIMEMultipart
@@ -22,28 +22,28 @@ class BenchmarkRunner(object):
     def __init__(self):
         self._successful = True
         self._status = []
-        parser = optparse.OptionParser()
+        parser = argparse.ArgumentParser(
+            formatter_class=argparse.RawDescriptionHelpFormatter)
         # register common options
-        parser.add_option('', '--title')
-        parser.add_option('', '--mail-to', action='append')
-        parser.add_option('', '--mail-from')
-        parser.add_option('', '--mail-server')
-        parser.add_option('', '--repeat', type='int', default=1)
+        _ = parser.add_argument
+        _('--title')
+        _('--mail-to', action='append')
+        _('--mail-from')
+        _('--mail-server')
         self.add_options(parser)
         # check common arguments
-        options, args = parser.parse_args()
-        if bool(options.mail_to) ^ bool(options.mail_from):
+        args = parser.parse_args()
+        if bool(args.mail_to) ^ bool(args.mail_from):
             sys.exit('Need a sender and recipients to mail report')
-        mail_server = options.mail_server or MAIL_SERVER
+        mail_server = args.mail_server or MAIL_SERVER
         # check specifics arguments
         self._config = AttributeDict()
-        self._config.update(self.load_options(options, args))
+        self._config.update(self.load_options(args))
         self._config.update(
-            title = options.title or self.__class__.__name__,
-            mail_from = options.mail_from,
-            mail_to = options.mail_to,
+            title = args.title or self.__class__.__name__,
+            mail_from = args.mail_from,
+            mail_to = args.mail_to,
             mail_server = mail_server.split(':'),
-            repeat = options.repeat,
         )
 
     def add_status(self, key, value):
@@ -104,7 +104,7 @@ class BenchmarkRunner(object):
         """ Append options to command line parser """
         raise NotImplementedError
 
-    def load_options(self, options, args):
+    def load_options(self, args):
         """ Check options and return a configuration dict """
         raise NotImplementedError
 

neo/tests/client/testClientApp.py

 #
-# Copyright (C) 2009-2017  Nexedi SA
+# Copyright (C) 2009-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License

neo/tests/client/testMasterHandler.py

 #
-# Copyright (C) 2009-2017  Nexedi SA
+# Copyright (C) 2009-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License

neo/tests/client/testZODBURI.py

 #
-# Copyright (C) 2017  Nexedi SA
+# Copyright (C) 2017-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License

neo/tests/cluster.py

 #
-# Copyright (C) 2011-2017  Nexedi SA
+# Copyright (C) 2011-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License

neo/tests/functional/__init__.py

 #
-# Copyright (C) 2009-2017  Nexedi SA
+# Copyright (C) 2009-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -118,13 +118,15 @@ class PortAllocator(object):
 class Process(object):
 
     _coverage_fd = None
-    _coverage_prefix = os.path.join(getTempDirectory(), 'coverage-')
+    _coverage_prefix = None
     _coverage_index = 0
+    on_fork = [logging.resetNids]
     pid = 0
 
-    def __init__(self, command, arg_dict={}):
+    def __init__(self, command, *args, **kw):
         self.command = command
-        self.arg_dict = arg_dict
+        self.args = args
+        self.arg_dict = kw
 
     def _args(self):
         args = []
@@ -132,6 +134,7 @@ class Process(object):
             args.append('--' + arg)
             if param is not None:
                 args.append(str(param))
+        args += self.args
         return args
 
     def start(self):
@@ -144,6 +147,9 @@ class Process(object):
         if coverage:
             cls = self.__class__
             cls._coverage_index += 1
+            if not cls._coverage_prefix:
+                cls._coverage_prefix = os.path.join(
+                    getTempDirectory(), 'coverage-')
             coverage_data_path = cls._coverage_prefix + str(cls._coverage_index)
         self._coverage_fd, w = os.pipe()
         def save_coverage(*args):
@@ -169,11 +175,21 @@ class Process(object):
                     from coverage import Coverage
                     coverage = Coverage(coverage_data_path)
                     coverage.start()
+                # XXX: Sometimes, the handler is not called immediately.
+                #      The process is stuck at an unknown place and the test
+                #      never ends. strace unlocks:
+                #        strace: Process 5520 attached
+                #        close(25)                               = 0
+                #        getpid()                                = 5520
+                #        kill(5520, SIGSTOP)                     = 0
+                #        ...
                 signal.signal(signal.SIGUSR2, save_coverage)
                 os.close(self._coverage_fd)
                 os.write(w, '\0')
                 sys.argv = [command] + args
                 setproctitle(self.command)
+                for on_fork in self.on_fork:
+                    on_fork()
                 self.run()
                 status = 0
             except SystemExit, e:
@@ -239,8 +255,8 @@ class Process(object):
         self.pid = 0
         self.child_coverage()
         if result:
-            raise NodeProcessError('%r %r exited with status %r' % (
-                self.command, self.arg_dict, result))
+            raise NodeProcessError('%r %r %r exited with status %r' % (
+                self.command, self.args, self.arg_dict, result))
         return result
 
     def stop(self):
@@ -255,18 +271,18 @@ class Process(object):
 
 class NEOProcess(Process):
 
-    def __init__(self, command, uuid, arg_dict):
+    def __init__(self, command, *args, **kw):
         try:
             __import__('neo.scripts.' + command, level=0)
         except ImportError:
             raise NotFound(command + ' not found')
-        super(NEOProcess, self).__init__(command, arg_dict)
-        self.setUUID(uuid)
+        self.setUUID(kw.pop('uuid', None))
+        super(NEOProcess, self).__init__(command, *args, **kw)
 
     def _args(self):
         args = super(NEOProcess, self)._args()
         if self.uuid:
-            args += '--uuid', str(self.uuid)
+            args[:0] = '--uuid', str(self.uuid)
         return args
 
     def run(self):
@@ -281,6 +297,10 @@ class NEOProcess(Process):
         """
         self.uuid = uuid
 
+    @property
+    def logfile(self):
+        return self.arg_dict['logfile']
+
 class NEOCluster(object):
 
     SSL = None
@@ -360,7 +380,7 @@ class NEOCluster(object):
         if self.SSL:
             kw['ca'], kw['cert'], kw['key'] = self.SSL
         self.process_dict.setdefault(node_type, []).append(
-            NEOProcess(command_dict[node_type], uuid, kw))
+            NEOProcess(command_dict[node_type], uuid=uuid, **kw))
 
     def setupDB(self, clear_databases=True):
         if self.adapter == 'MySQL':
@@ -472,14 +492,15 @@ class NEOCluster(object):
                 except (AlreadyStopped, NodeProcessError):
                     pass
 
-    def getZODBStorage(self, **kw):
-        master_nodes = self.master_nodes.replace('/', ' ')
+    def getClientConfig(self, **kw):
+        kw['name'] = self.cluster_name
+        kw['master_nodes'] = self.master_nodes.replace('/', ' ')
         if self.SSL:
             kw['ca'], kw['cert'], kw['key'] = self.SSL
-        result = Storage(
-            master_nodes=master_nodes,
-            name=self.cluster_name,
-            **kw)
+        return kw
+
+    def getZODBStorage(self, **kw):
+        result = Storage(**self.getClientConfig(**kw))
         result.app.max_reconnection_to_master = 10
         self.zodb_storage_list.append(result)
         return result
@@ -710,6 +731,7 @@ class NEOFunctionalTest(NeoTestBase):
 
     def setupLog(self):
         logging.setup(os.path.join(self.getTempDirectory(), 'test.log'))
+        logging.resetNids()
 
     def getTempDirectory(self):
         # build the full path based on test case and current test method

neo/tests/functional/testClient.py

 #
-# Copyright (C) 2009-2017  Nexedi SA
+# Copyright (C) 2009-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -14,6 +14,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
+from __future__ import print_function
 import os
 import unittest
 import transaction
@@ -25,7 +26,7 @@ from neo.lib.util import makeChecksum, u64
 from ZODB.FileStorage import FileStorage
 from ZODB.tests.StorageTestBase import zodb_pickle
 from persistent import Persistent
-from . import NEOCluster, NEOFunctionalTest
+from . import NEOCluster, NEOFunctionalTest, NEOProcess
 
 TREE_SIZE = 6
 
@@ -120,13 +121,13 @@ class ClientTests(NEOFunctionalTest):
         self.__checkTree(tree.right, depth)
         self.__checkTree(tree.left, depth)
 
-    def __getDataFS(self, reset=False):
+    def __getDataFS(self):
         name = os.path.join(self.getTempDirectory(), 'data.fs')
-        if reset and os.path.exists(name):
+        if os.path.exists(name):
             os.remove(name)
         return FileStorage(file_name=name)
 
-    def __populate(self, db, tree_size=TREE_SIZE):
+    def __populate(self, db, tree_size=TREE_SIZE, with_undo=True):
         if isinstance(db.storage, FileStorage):
             from base64 import b64encode as undo_tid
         else:
@@ -146,6 +147,7 @@ class ClientTests(NEOFunctionalTest):
         t2 = db.lastTransaction()
         ob.left = left
         transaction.commit()
+        if with_undo:
             undo()
             t4 = db.lastTransaction()
             undo(t2)
@@ -174,10 +176,37 @@ class ClientTests(NEOFunctionalTest):
         (neo_db, neo_conn) = self.neo.getZODBConnection()
         self.__checkTree(neo_conn.root()['trees'])
 
-    def __dump(self, storage):
-        return {u64(t.tid): [(u64(o.oid), o.data_txn and u64(o.data_txn),
+    def testMigrationTool(self):
+        dfs_storage  = self.__getDataFS()
+        dfs_db = ZODB.DB(dfs_storage)
+        self.__populate(dfs_db, with_undo=False)
+        dump = self.__dump(dfs_storage)
+        fs_path = dfs_storage.__name__
+        dfs_db.close()
+
+        neo = self.neo
+        neo.start()
+
+        kw = {'cluster': neo.cluster_name, 'quiet': None}
+        master_nodes = neo.master_nodes.replace('/', ' ')
+        if neo.SSL:
+            kw['ca'], kw['cert'], kw['key'] = neo.SSL
+
+        p = NEOProcess('neomigrate', fs_path, master_nodes, **kw)
+        p.start()
+        p.wait()
+
+        os.remove(fs_path)
+        p = NEOProcess('neomigrate', master_nodes, fs_path, **kw)
+        p.start()
+        p.wait()
+
+        self.assertEqual(dump, self.__dump(FileStorage(fs_path)))
+
+    def __dump(self, storage, sorted=sorted):
+        return {u64(t.tid): sorted((u64(o.oid), o.data_txn and u64(o.data_txn),
                               None if o.data is None else makeChecksum(o.data))
-                             for o in t]
+                            for o in t)
                 for t in storage.iterator()}
 
     def testExport(self):
@@ -186,10 +215,10 @@ class ClientTests(NEOFunctionalTest):
         self.neo.start()
         (neo_db, neo_conn) = self.neo.getZODBConnection()
         self.__populate(neo_db)
-        dump = self.__dump(neo_db.storage)
+        dump = self.__dump(neo_db.storage, list)
 
         # copy neo to data fs
-        dfs_storage  = self.__getDataFS(reset=True)
+        dfs_storage  = self.__getDataFS()
         neo_storage = self.neo.getZODBStorage()
         dfs_storage.copyTransactionsFrom(neo_storage)
 
@@ -209,7 +238,10 @@ class ClientTests(NEOFunctionalTest):
         self.neo.start()
         neo_db, neo_conn = self.neo.getZODBConnection()
         self.__checkTree(neo_conn.root()['trees'])
-        self.assertEqual(dump, self.__dump(neo_db.storage))
+        # BUG: The following check is sometimes done whereas the import is not
+        #      finished, resulting in a failure because getReplicationTIDList
+        #      is not implemented by the Importer backend.
+        self.assertEqual(dump, self.__dump(neo_db.storage, list))
 
     def testIPv6Client(self):
         """ Test the connectivity of an IPv6 connection for neo client """

neo/tests/functional/testCluster.py

 #
-# Copyright (C) 2009-2017  Nexedi SA
+# Copyright (C) 2009-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License

neo/tests/functional/testMaster.py

 #
-# Copyright (C) 2009-2017  Nexedi SA
+# Copyright (C) 2009-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License

neo/tests/functional/testStorage.py

 #
-# Copyright (C) 2009-2017  Nexedi SA
+# Copyright (C) 2009-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License

neo/tests/master/testClientHandler.py

 #
-# Copyright (C) 2009-2017  Nexedi SA
+# Copyright (C) 2009-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License

neo/tests/master/testMasterApp.py

 #
-# Copyright (C) 2009-2017  Nexedi SA
+# Copyright (C) 2009-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License

neo/tests/master/testMasterPT.py

 #
-# Copyright (C) 2009-2017  Nexedi SA
+# Copyright (C) 2009-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License

neo/tests/master/testRecovery.py

 #
-# Copyright (C) 2009-2017  Nexedi SA
+# Copyright (C) 2009-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License

neo/tests/master/testStorageHandler.py

 #
-# Copyright (C) 2009-2017  Nexedi SA
+# Copyright (C) 2009-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License

neo/tests/master/testTransactions.py

 #
-# Copyright (C) 2006-2017  Nexedi SA
+# Copyright (C) 2006-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -61,8 +61,8 @@ class testTransactionManager(NeoUnitTestBase):
         tid1 = self.getNextTID()
         tid2 = self.getNextTID()
         tm.begin(node1, 0, tid1)
-        tm.clientLost(node1)
-        self.assertTrue(tid1 not in tm)
+        self.assertEqual(1, len(list(tm.clientLost(node1))))
+        self.assertNotIn(tid1, tm)
 
 if __name__ == '__main__':
     unittest.main()

neo/tests/random_tree.py

 #
-# Copyright (C) 2018  Nexedi SA
+# Copyright (C) 2018-2019  Nexedi SA
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License