Bump protocol version

neo/admin/app.py

@@ -105,13 +105,9 @@ class Application(BaseApplication):
         """
         self.cluster_state = None
         # search, find, connect and identify to the primary master
-        bootstrap = BootstrapManager(self, self.name, NodeTypes.ADMIN,
-                self.uuid, self.server)
-        data = bootstrap.getPrimaryConnection()
-        (node, conn, uuid, num_partitions, num_replicas) = data
-        self.master_node = node
-        self.master_conn = conn
-        self.uuid = uuid
+        bootstrap = BootstrapManager(self, NodeTypes.ADMIN, self.server)
+        self.master_node, self.master_conn, num_partitions, num_replicas = \
+            bootstrap.getPrimaryConnection()
 
         if self.pt is None:
             self.pt = PartitionTable(num_partitions, num_replicas)
@@ -125,7 +121,6 @@ class Application(BaseApplication):
         # passive handler
         self.master_conn.setHandler(self.master_event_handler)
         self.master_conn.ask(Packets.AskClusterState())
-        self.master_conn.ask(Packets.AskNodeInformation())
         self.master_conn.ask(Packets.AskPartitionTable())
 
     def sendPartitionTable(self, conn, min_offset, max_offset, uuid):

neo/admin/handler.py

@@ -106,11 +106,6 @@ class MasterEventHandler(EventHandler):
     def answerClusterState(self, conn, state):
         self.app.cluster_state = state
 
-    def answerNodeInformation(self, conn):
-        # XXX: This will no more exists when the initialization module will be
-        # implemented for factorize code (as done for bootstrap)
-        logging.debug("answerNodeInformation")
-
     def notifyPartitionChanges(self, conn, ptid, cell_list):
         self.app.pt.update(ptid, cell_list, self.app.nm)
 
@@ -125,8 +120,6 @@ class MasterEventHandler(EventHandler):
     def notifyClusterInformation(self, conn, cluster_state):
         self.app.cluster_state = cluster_state
 
-    def notifyNodeInformation(self, conn, node_list):
-        self.app.nm.update(node_list)
 
 class MasterRequestEventHandler(EventHandler):
     """ This class handle all answer from primary master node"""

neo/client/app.py

@@ -240,10 +240,10 @@ class Application(ThreadedApplication):
                         self.notifications_handler,
                         node=self.trying_master_node,
                         dispatcher=self.dispatcher)
+                p = Packets.RequestIdentification(
+                    NodeTypes.CLIENT, self.uuid, None, self.name, None)
                 try:
-                    ask(conn, Packets.RequestIdentification(
-                            NodeTypes.CLIENT, self.uuid, None, self.name),
-                        handler=handler)
+                    ask(conn, p, handler=handler)
                 except ConnectionClosed:
                     continue
                 # If we reached the primary master node, mark as connected
@@ -256,7 +256,6 @@ class Application(ThreadedApplication):
                 # operational. Might raise ConnectionClosed so that the new
                 # primary can be looked-up again.
                 logging.info('Initializing from master')
-                ask(conn, Packets.AskNodeInformation(), handler=handler)
                 ask(conn, Packets.AskPartitionTable(), handler=handler)
                 ask(conn, Packets.AskLastTransaction(), handler=handler)
                 if self.pt.operational():

neo/client/handlers/master.py

@@ -30,6 +30,16 @@ class PrimaryBootstrapHandler(AnswerBaseHandler):
         self.app.trying_master_node = None
         conn.close()
 
+    def answerPartitionTable(self, conn, ptid, row_list):
+        assert row_list
+        self.app.pt.load(ptid, row_list, self.app.nm)
+
+    def answerLastTransaction(*args):
+        pass
+
+class PrimaryNotificationsHandler(MTEventHandler):
+    """ Handler that process the notifications from the primary master """
+
     def _acceptIdentification(self, node, uuid, num_partitions,
             num_replicas, your_uuid, primary, known_master_list):
         app = self.app
@@ -77,27 +87,13 @@ class PrimaryBootstrapHandler(AnswerBaseHandler):
             raise ProtocolError('No UUID supplied')
         app.uuid = your_uuid
         logging.info('Got an UUID: %s', dump(app.uuid))
+        app.id_timestamp = None
 
         # Always create partition table
         app.pt = PartitionTable(num_partitions, num_replicas)
 
-    def answerPartitionTable(self, conn, ptid, row_list):
-        assert row_list
-        self.app.pt.load(ptid, row_list, self.app.nm)
-
-    def answerNodeInformation(self, conn):
-        pass
-
     def answerLastTransaction(self, conn, ltid):
-        pass
-
-class PrimaryNotificationsHandler(MTEventHandler):
-    """ Handler that process the notifications from the primary master """
-
-    def packetReceived(self, conn, packet, kw={}):
-        if type(packet) is Packets.AnswerLastTransaction:
             app = self.app
-            ltid = packet.decode()[0]
             if app.last_tid != ltid:
                 # Either we're connecting or we already know the last tid
                 # via invalidations.
@@ -124,15 +120,15 @@ class PrimaryNotificationsHandler(MTEventHandler):
                     db = app.getDB()
                     db is None or db.invalidateCache()
                 app.last_tid = ltid
-        elif type(packet) is Packets.AnswerTransactionFinished:
+
+    def answerTransactionFinished(self, conn, _, tid, callback, cache_dict):
             app = self.app
-            app.last_tid = tid = packet.decode()[1]
-            callback = kw.pop('callback')
+            app.last_tid = tid
             # Update cache
             cache = app._cache
             app._cache_lock_acquire()
             try:
-                for oid, data in kw.pop('cache_dict').iteritems():
+                for oid, data in cache_dict.iteritems():
                     # Update ex-latest value in cache
                     cache.invalidate(oid, tid)
                     if data is not None:
@@ -142,7 +138,6 @@ class PrimaryNotificationsHandler(MTEventHandler):
                     callback(tid)
             finally:
                 app._cache_lock_release()
-        MTEventHandler.packetReceived(self, conn, packet, kw)
 
     def connectionClosed(self, conn):
         app = self.app
@@ -185,13 +180,14 @@ class PrimaryNotificationsHandler(MTEventHandler):
             self.app.pt.update(ptid, cell_list, self.app.nm)
 
     def notifyNodeInformation(self, conn, node_list):
-        nm = self.app.nm
-        nm.update(node_list)
+        super(PrimaryNotificationsHandler, self).notifyNodeInformation(
+            conn, node_list)
         # XXX: 'update' automatically closes DOWN nodes. Do we really want
         #      to do the same thing for nodes in other non-running states ?
-        for node_type, addr, uuid, state in node_list:
-            if state != NodeStates.RUNNING:
-                node = nm.getByUUID(uuid)
+        getByUUID = self.app.nm.getByUUID
+        for node in node_list:
+            if node[3] != NodeStates.RUNNING:
+                node = getByUUID(node[2])
                 if node and node.isConnected():
                     node.getConnection().close()
 

neo/client/handlers/storage.py

@@ -41,14 +41,6 @@ class StorageEventHandler(MTEventHandler):
         self.app.cp.removeConnection(node)
         super(StorageEventHandler, self).connectionFailed(conn)
 
-
-class StorageBootstrapHandler(AnswerBaseHandler):
-    """ Handler used when connecting to a storage node """
-
-    def notReady(self, conn, message):
-        conn.close()
-        raise NodeNotReady(message)
-
     def _acceptIdentification(self, node,
            uuid, num_partitions, num_replicas, your_uuid, primary,
            master_list):
@@ -57,6 +49,13 @@ class StorageBootstrapHandler(AnswerBaseHandler):
             primary, self.app.master_conn)
         assert uuid == node.getUUID(), (uuid, node.getUUID())
 
+class StorageBootstrapHandler(AnswerBaseHandler):
+    """ Handler used when connecting to a storage node """
+
+    def notReady(self, conn, message):
+        conn.close()
+        raise NodeNotReady(message)
+
 class StorageAnswersHandler(AnswerBaseHandler):
     """ Handle all messages related to ZODB operations """
 

neo/client/pool.py

@@ -57,7 +57,7 @@ class ConnectionPool(object):
         conn = MTClientConnection(app, app.storage_event_handler, node,
                                   dispatcher=app.dispatcher)
         p = Packets.RequestIdentification(NodeTypes.CLIENT,
-            app.uuid, None, app.name)
+            app.uuid, None, app.name, app.id_timestamp)
         try:
             app._ask(conn, p, handler=app.storage_bootstrap_handler)
         except ConnectionClosed:

neo/lib/bootstrap.py

@@ -26,7 +26,7 @@ class BootstrapManager(EventHandler):
     """
     accepted = False
 
-    def __init__(self, app, name, node_type, uuid=None, server=None):
+    def __init__(self, app, node_type, server=None):
         """
         Manage the bootstrap stage of a non-master node, it lookup for the
         primary master node, connect to it then returns when the master node
@@ -35,12 +35,12 @@ class BootstrapManager(EventHandler):
         self.primary = None
         self.server = server
         self.node_type = node_type
-        self.uuid = uuid
-        self.name = name
         self.num_replicas = None
         self.num_partitions = None
         self.current = None
 
+    uuid = property(lambda self: self.app.uuid)
+
     def announcePrimary(self, conn):
         # We found the primary master early enough to be notified of election
         # end. Lucky. Anyway, we must carry on with identification request, so
@@ -55,7 +55,7 @@ class BootstrapManager(EventHandler):
         EventHandler.connectionCompleted(self, conn)
         self.current.setRunning()
         conn.ask(Packets.RequestIdentification(self.node_type, self.uuid,
-            self.server, self.name))
+            self.server, self.app.name, None))
 
     def connectionFailed(self, conn):
         """
@@ -106,8 +106,9 @@ class BootstrapManager(EventHandler):
         self.num_replicas = num_replicas
         if self.uuid != your_uuid:
             # got an uuid from the primary master
-            self.uuid = your_uuid
+            self.app.uuid = your_uuid
             logging.info('Got a new UUID: %s', uuid_str(self.uuid))
+        self.app.id_timestamp = None
         self.accepted = True
 
     def getPrimaryConnection(self):
@@ -141,8 +142,4 @@ class BootstrapManager(EventHandler):
                     continue
             # still processing
             poll(1)
-        return (self.current, conn, self.uuid, self.num_partitions,
-            self.num_replicas)
-
-
-
+        return self.current, conn, self.num_partitions, self.num_replicas

neo/lib/handler.py

@@ -165,6 +165,10 @@ class EventHandler(object):
             return
         conn.close()
 
+    def notifyNodeInformation(self, conn, node_list):
+        app = self.app
+        app.nm.update(app, node_list)
+
     def ping(self, conn):
         conn.answer(Packets.Pong())
 
@@ -227,6 +231,9 @@ class MTEventHandler(EventHandler):
     def packetReceived(self, conn, packet, kw={}):
         """Redirect all received packet to dispatcher thread."""
         if packet.isResponse():
+            if packet.poll_thread:
+                self.dispatch(conn, packet, kw)
+                kw = {}
             if not (self.dispatcher.dispatch(conn, packet.getId(), packet, kw)
                     or type(packet) is Packets.Pong):
                 raise ProtocolError('Unexpected response packet from %r: %r'
@@ -254,3 +261,6 @@ class AnswerBaseHandler(EventHandler):
     packetReceived = unexpectedInAnswerHandler
     peerBroken = unexpectedInAnswerHandler
     protocolError = unexpectedInAnswerHandler
+
+    def acceptIdentification(*args):
+        pass

neo/lib/node.py

@@ -27,6 +27,7 @@ class Node(object):
 
     _connection = None
     _identified = False
+    id_timestamp = None
 
     def __init__(self, manager, address=None, uuid=None,
             state=NodeStates.UNKNOWN):
@@ -172,7 +173,8 @@ class Node(object):
 
     def asTuple(self):
         """ Returned tuple is intended to be used in protocol encoders """
-        return (self.getType(), self._address, self._uuid, self._state)
+        return (self.getType(), self._address, self._uuid, self._state,
+                self.id_timestamp)
 
     def __gt__(self, node):
         # sort per UUID if defined
@@ -348,9 +350,11 @@ class NodeManager(object):
         """ Return the node that match with a given address """
         return self._address_dict.get(address, None)
 
-    def getByUUID(self, uuid):
+    def getByUUID(self, uuid, *id_timestamp):
         """ Return the node that match with a given UUID """
-        return self._uuid_dict.get(uuid, None)
+        node = self._uuid_dict.get(uuid)
+        if not id_timestamp or node and (node.id_timestamp,) == id_timestamp:
+            return node
 
     def _createNode(self, klass, address=None, uuid=None, **kw):
         by_address = self.getByAddress(address)
@@ -386,8 +390,9 @@ class NodeManager(object):
     def createFromNodeType(self, node_type, **kw):
         return self._createNode(NODE_TYPE_MAPPING[node_type], **kw)
 
-    def update(self, node_list):
-        for node_type, addr, uuid, state in node_list:
+    def update(self, app, node_list):
+        node_set = self._node_set.copy() if app.id_timestamp is None else None
+        for node_type, addr, uuid, state, id_timestamp in node_list:
             # This should be done here (although klass might not be used in this
             # iteration), as it raises if type is not valid.
             klass = NODE_TYPE_MAPPING[node_type]
@@ -397,14 +402,14 @@ class NodeManager(object):
             node_by_addr = self.getByAddress(addr)
             node = node_by_uuid or node_by_addr
 
-            log_args = node_type, uuid_str(uuid), addr, state
+            log_args = node_type, uuid_str(uuid), addr, state, id_timestamp
             if node is None:
                 if state == NodeStates.DOWN:
-                    logging.debug('NOT creating node %s %s %s %s', *log_args)
-                else:
-                    node = self._createNode(klass, address=addr, uuid=uuid,
-                            state=state)
-                    logging.debug('creating node %r', node)
+                    logging.debug('NOT creating node %s %s %s %s %s', *log_args)
+                    continue
+                node = self._createNode(klass, address=addr, uuid=uuid,
+                        state=state)
+                logging.debug('creating node %r', node)
             else:
                 assert isinstance(node, klass), 'node %r is not ' \
                     'of expected type: %r' % (node, klass)
@@ -414,7 +419,7 @@ class NodeManager(object):
                     'node_by_addr (%r)' % (node_by_uuid, node_by_addr)
                 if state == NodeStates.DOWN:
                     logging.debug('dropping node %r (%r), found with %s '
-                        '%s %s %s', node, node.isConnected(), *log_args)
+                        '%s %s %s %s', node, node.isConnected(), *log_args)
                     if node.isConnected():
                         # Cut this connection, node removed by handler.
                         # It's important for a storage to disconnect nodes that
@@ -424,12 +429,20 @@ class NodeManager(object):
                         # partition table upon disconnection.
                         node.getConnection().close()
                     self.remove(node)
-                else:
-                    logging.debug('updating node %r to %s %s %s %s',
-                        node, *log_args)
-                    node.setUUID(uuid)
-                    node.setAddress(addr)
-                    node.setState(state)
+                    continue
+                logging.debug('updating node %r to %s %s %s %s %s',
+                    node, *log_args)
+                node.setUUID(uuid)
+                node.setAddress(addr)
+                node.setState(state)
+            node.id_timestamp = id_timestamp
+            if app.uuid == uuid:
+                app.id_timestamp = id_timestamp
+        if node_set:
+            # For the first notification, we receive a full list of nodes from
+            # the master. Remove all unknown nodes from a previous connection.
+            for node in node_set - self._node_set:
+                self.remove(node)
         self.log()
 
     def log(self):

neo/lib/protocol.py

@@ -20,7 +20,7 @@ import traceback
 from cStringIO import StringIO
 from struct import Struct
 
-PROTOCOL_VERSION = 7
+PROTOCOL_VERSION = 8
 
 # Size restrictions.
 MIN_PACKET_SIZE = 10
@@ -234,6 +234,7 @@ class Packet(object):
     _code = None
     _fmt = None
     _id = None
+    poll_thread = False
 
     def __init__(self, *args, **kw):
         assert self._code is not None, "Packet class not registered"
@@ -594,6 +595,13 @@ class PTID(PItem):
 # same definition, for now
 POID = PTID
 
+class PFloat(PStructItemOrNone):
+    """
+        A float number (8-bytes length)
+    """
+    _fmt = '!d'
+    _None = '\xff' * 8
+
 # common definitions
 
 PFEmpty = PStruct('no_content')
@@ -607,6 +615,7 @@ PFNodeList = PList('node_list',
         PAddress('address'),
         PUUID('uuid'),
         PFNodeState,
+        PFloat('id_timestamp'),
     ),
 )
 
@@ -680,6 +689,7 @@ class RequestIdentification(Packet):
     Request a node identification. This must be the first packet for any
     connection. Any -> Any.
     """
+    poll_thread = True
 
     _fmt = PStruct('request_identification',
         PProtocol('protocol_version'),
@@ -687,6 +697,7 @@ class RequestIdentification(Packet):
         PUUID('uuid'),
         PAddress('address'),
         PString('name'),
+        PFloat('id_timestamp'),
     )
 
     _answer = PStruct('accept_identification',
@@ -867,6 +878,8 @@ class FinishTransaction(Packet):
     Finish a transaction. C -> PM.
     Answer when a transaction is finished. PM -> C.
     """
+    poll_thread = True
+
     _fmt = PStruct('ask_finish_transaction',
         PTID('tid'),
         PFOidList,
@@ -1152,12 +1165,6 @@ class NotifyNodeInformation(Packet):
         PFNodeList,
     )
 
-class NodeInformation(Packet):
-    """
-    Ask node information
-    """
-    _answer = PFEmpty
-
 class SetClusterState(Packet):
     """
     Set the cluster state
@@ -1373,6 +1380,7 @@ class LastTransaction(Packet):
     Answer last committed TID.
     M -> C
     """
+    poll_thread = True
 
     _answer = PStruct('answer_last_transaction',
         PTID('tid'),
@@ -1521,6 +1529,7 @@ def register(request, ignore_when_closed=None):
     # build a class for the answer
     answer = type('Answer%s' % (request.__name__, ), (Packet, ), {})
     answer._fmt = request._answer
+    answer.poll_thread = request.poll_thread
     # compute the answer code
     code = code | RESPONSE_MASK
     answer._request = request
@@ -1673,8 +1682,6 @@ class Packets(dict):
                     AddPendingNodes, ignore_when_closed=False)
     TweakPartitionTable = register(
                     TweakPartitionTable, ignore_when_closed=False)
-    AskNodeInformation, AnswerNodeInformation = register(
-                    NodeInformation)
     SetClusterState = register(
                     SetClusterState, ignore_when_closed=False)
     NotifyClusterInformation = register(

neo/lib/threaded_app.py

@@ -43,6 +43,8 @@ class ThreadContainer(threading.local):
 class ThreadedApplication(BaseApplication):
     """The client node application."""
 
+    uuid = None
+
     def __init__(self, master_nodes, name, **kw):
         super(ThreadedApplication, self).__init__(**kw)
         self.poll_thread = threading.Thread(target=self.run, name=name)
@@ -56,8 +58,6 @@ class ThreadedApplication(BaseApplication):
         for address in master_nodes:
             self.nm.createMaster(address=address)
 
-        # no self-assigned UUID, primary master will supply us one
-        self.uuid = None
         # Internal attribute distinct between thread
         self._thread_container = ThreadContainer()
         app_set.add(self) # to register self.on_log

neo/master/app.py

@@ -15,6 +15,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import sys, weakref
+from collections import defaultdict
 from time import time
 
 from neo.lib import logging
@@ -44,7 +45,6 @@ class Application(BaseApplication):
     last_transaction = ZERO_TID
     backup_tid = None
     backup_app = None
-    uuid = None
     truncate_tid = None
 
     def __init__(self, config):
@@ -79,9 +79,7 @@ class Application(BaseApplication):
         self.primary_master_node = None
         self.cluster_state = None
 
-        uuid = config.getUUID()
-        if uuid:
-            self.uuid = uuid
+        self.uuid = config.getUUID()
 
         # election related data
         self.unconnected_master_node_set = set()
@@ -227,19 +225,20 @@ class Application(BaseApplication):
           Broadcast changes for a set a nodes
           Send only one packet per connection to reduce bandwidth
         """
-        node_dict = {}
+        node_dict = defaultdict(list)
         # group modified nodes by destination node type
         for node in node_list:
             node_info = node.asTuple()
-            def assign_for_notification(node_type):
-                # helper function
-                node_dict.setdefault(node_type, []).append(node_info)
-            if node.isMaster() or node.isStorage():
-                # client get notifications for master and storage only
-                assign_for_notification(NodeTypes.CLIENT)
-            if node.isMaster() or node.isStorage() or node.isClient():
-                assign_for_notification(NodeTypes.STORAGE)
-                assign_for_notification(NodeTypes.ADMIN)
+            if node.isAdmin():
+                continue
+            node_dict[NodeTypes.ADMIN].append(node_info)
+            node_dict[NodeTypes.STORAGE].append(node_info)
+            if node.isClient():
+                continue
+            node_dict[NodeTypes.CLIENT].append(node_info)
+            if node.isStorage():
+                continue
+            node_dict[NodeTypes.MASTER].append(node_info)
 
         # send at most one non-empty notification packet per node
         for node in self.nm.getIdentifiedList():
@@ -498,7 +497,7 @@ class Application(BaseApplication):
                 conn.setHandler(handler)
                 conn.notify(Packets.NotifyNodeInformation(((
                   node.getType(), node.getAddress(), node.getUUID(),
-                  NodeStates.TEMPORARILY_DOWN),)))
+                  NodeStates.TEMPORARILY_DOWN, None),)))
                 conn.abort()
             elif conn.pending():
                 conn.abort()

neo/master/backup_app.py

@@ -65,6 +65,7 @@ There is no UUID conflict between the 2 clusters:
 class BackupApplication(object):
 
     pt = None
+    uuid = None
 
     def __init__(self, app, name, master_addresses):
         self.app = weakref.proxy(app)
@@ -92,7 +93,7 @@ class BackupApplication(object):
         pt = app.pt
         while True:
             app.changeClusterState(ClusterStates.STARTING_BACKUP)
-            bootstrap = BootstrapManager(self, self.name, NodeTypes.CLIENT)
+            bootstrap = BootstrapManager(self, NodeTypes.CLIENT)
             # {offset -> node}
             self.primary_partition_dict = {}
             # [[tid]]
@@ -105,7 +106,7 @@ class BackupApplication(object):
                     else:
                         break
                     poll(1)
-                node, conn, uuid, num_partitions, num_replicas = \
+                node, conn, num_partitions, num_replicas = \
                     bootstrap.getPrimaryConnection()
                 try:
                     app.changeClusterState(ClusterStates.BACKINGUP)
@@ -114,7 +115,6 @@ class BackupApplication(object):
                         raise RuntimeError("inconsistent number of partitions")
                     self.pt = PartitionTable(num_partitions, num_replicas)
                     conn.setHandler(BackupHandler(self))
-                    conn.ask(Packets.AskNodeInformation())
                     conn.ask(Packets.AskPartitionTable())
                     conn.ask(Packets.AskLastTransaction())
                     # debug variable to log how big 'tid_list' can be.

neo/master/handlers/__init__.py

@@ -18,7 +18,7 @@ from neo.lib import logging
 from neo.lib.exception import StoppedOperation
 from neo.lib.handler import EventHandler
 from neo.lib.protocol import (uuid_str, NodeTypes, NodeStates, Packets,
-    BrokenNodeDisallowedError,
+    BrokenNodeDisallowedError, ProtocolError,
 )
 
 class MasterHandler(EventHandler):
@@ -27,18 +27,19 @@ class MasterHandler(EventHandler):
     def connectionCompleted(self, conn, new=None):
         if new is None:
             super(MasterHandler, self).connectionCompleted(conn)
+        elif new:
+            self._notifyNodeInformation(conn)
 
-    def requestIdentification(self, conn, node_type, uuid, address, name):
+    def requestIdentification(self, conn, node_type, uuid, address, name, _):
         self.checkClusterName(name)
         app = self.app
         node = app.nm.getByUUID(uuid)
         if node:
-            assert node_type is not NodeTypes.MASTER or node.getAddress() in (
-                address, None), (node, address)
+            if node_type is NodeTypes.MASTER and not (
+               None != address == node.getAddress()):
+                raise ProtocolError
             if node.isBroken():
                 raise BrokenNodeDisallowedError
-        else:
-            node = app.nm.getByAddress(address)
         peer_uuid = self._setupNode(conn, node_type, uuid, address, node)
         if app.primary:
             primary_address = app.server
@@ -89,10 +90,6 @@ class MasterHandler(EventHandler):
         node_list.extend(n.asTuple() for n in nm.getStorageList())
         conn.notify(Packets.NotifyNodeInformation(node_list))
 
-    def askNodeInformation(self, conn):
-        self._notifyNodeInformation(conn)
-        conn.answer(Packets.AnswerNodeInformation())
-
     def askPartitionTable(self, conn):
         pt = self.app.pt
         conn.answer(Packets.AnswerPartitionTable(pt.getID(), pt.getRowList()))

neo/master/handlers/backup.py

@@ -31,12 +31,6 @@ class BackupHandler(EventHandler):
     def notifyPartitionChanges(self, conn, ptid, cell_list):
         self.app.pt.update(ptid, cell_list, self.app.nm)
 
-    def answerNodeInformation(self, conn):
-        pass
-
-    def notifyNodeInformation(self, conn, node_list):
-        self.app.nm.update(node_list)
-
     def answerLastTransaction(self, conn, tid):
         app = self.app
         if tid != ZERO_TID:

neo/master/handlers/client.py

@@ -31,14 +31,12 @@ class ClientServiceHandler(MasterHandler):
             app.broadcastNodesInformation([node])
             app.nm.remove(node)
 
-    def askNodeInformation(self, conn):
-        # send informations about master and storages only
+    def _notifyNodeInformation(self, conn):
         nm = self.app.nm
-        node_list = []
+        node_list = [nm.getByUUID(conn.getUUID()).asTuple()] # for id_timestamp
         node_list.extend(n.asTuple() for n in nm.getMasterList())
         node_list.extend(n.asTuple() for n in nm.getStorageList())
         conn.notify(Packets.NotifyNodeInformation(node_list))
-        conn.answer(Packets.AnswerNodeInformation())
 
     def askBeginTransaction(self, conn, tid):
         """

neo/master/handlers/election.py

@@ -23,6 +23,9 @@ from . import MasterHandler
 
 class BaseElectionHandler(EventHandler):
 
+    def _notifyNodeInformation(self, conn):
+        pass
+
     def reelectPrimary(self, conn):
         raise ElectionFailure, 'reelection requested'
 
@@ -53,6 +56,11 @@ class BaseElectionHandler(EventHandler):
 
 class ClientElectionHandler(BaseElectionHandler):
 
+    def notifyNodeInformation(self, conn, node_list):
+        # XXX: For the moment, do nothing because
+        # we'll close this connection and reconnect.
+        pass
+
     def connectionFailed(self, conn):
         addr = conn.getAddress()
         node = self.app.nm.getByAddress(addr)
@@ -68,6 +76,7 @@ class ClientElectionHandler(BaseElectionHandler):
             app.uuid,
             app.server,
             app.name,
+            None,
         ))
         super(ClientElectionHandler, self).connectionCompleted(conn)
 
@@ -126,8 +135,8 @@ class ServerElectionHandler(BaseElectionHandler, MasterHandler):
             logging.info('reject a connection from a non-master')
             raise NotReadyError
 
-        if node is None:
-            node = app.nm.createMaster(address=address)
+        if node is None is app.nm.getByAddress(address):
+            app.nm.createMaster(address=address)
 
         self.elect(conn, address)
         return uuid

neo/master/handlers/identification.py

@@ -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 time import time
 from neo.lib import logging
 from neo.lib.protocol import ClusterStates, NodeStates, NodeTypes, \
     NotReadyError, ProtocolError, uuid_str
@@ -30,18 +31,32 @@ class IdentificationHandler(MasterHandler):
 
     def _setupNode(self, conn, node_type, uuid, address, node):
         app = self.app