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Ivan Tyagov
neoppod
Commits
9a6ad2e6
Commit
9a6ad2e6
authored
Jun 03, 2014
by
Julien Muchembled
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Update BUGS
One entry should have been removed before v1.1
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BUGS
View file @
9a6ad2e6
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@@ -14,12 +14,12 @@ Although this should happen rarely enough not to affect performance, this can
be an issue if your application can't afford restarting the transaction,
e.g. because it interacted with external environment.
Master failure not recovered by clients
---------------------------------------
Client always raise in tpc_finish if a failure happen
---------------------------------------
--------------
After a master failure, clients are stuck in a bad state. In particular, caches
are not flushed, which could lead to data corruption if they reconnect a master.
This makes secondary masters mostly useless for the momen
t.
This is wrong because the failure may actually happen just after the transaction
is actually committed. Client should not raise if it can reconnect and note
that the transaction exis
t.
Storage failure or update may lead to POSException or break undoLog()
---------------------------------------------------------------------
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TODO
View file @
9a6ad2e6
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@@ -148,7 +148,7 @@ RC - Review output of pylint (CODE)
This can happen if it gets disconnected from primary master while waiting
for AnswerFinishTransaction after primary received it and hence will
commit transaction independently from client presence. Client could
legitima
l
tely think transaction is not committed, and might decide to
legitimately think transaction is not committed, and might decide to
retry. To solve this, client can know if its TTID got successfuly
committed by looking at currently unused '(t)trans.ttid' column.
See neo.threaded.test.Test.testStorageFailureDuringTpcFinish
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