]
William Burns reassigned ISPN-3842:
-----------------------------------
Assignee: William Burns (was: Mircea Markus)
Inconsistent L1 in non-tx distributed cache in certain circumstances
--------------------------------------------------------------------
Key: ISPN-3842
URL:
https://issues.jboss.org/browse/ISPN-3842
Project: Infinispan
Issue Type: Bug
Affects Versions: 6.0.0.Final
Reporter: Mikolaj Gierulski
Assignee: William Burns
In my poc environment there are two nodes in dist non-tx sync cluster with L1 enabled and
numOwners=1.
Node A, in a loop, reads one key (K), which is stored on node B (in test case it performs
about 1 000 000 reads per second).
From time to time K is updated on node B. This causes an L1 invalidation message sent to
A, and K is fetched from B upon next read attempt.
But whenever I run my test, I come to a situation, where updates of K no longer
invalidate it on A, and A sees old value of K.
When this happens, I can see in logs of node A:
{noformat}
18:21:33.296 [remote-thread-0] TRACE o.i.i.d.L1NonTxInterceptor - L1 invalidation found a
pending update for key K - need to block until finished
18:21:33.296 [remote-thread-0] TRACE o.i.i.d.L1NonTxInterceptor - Pending L1 update
completed successfully: true - L1 invalidation can occur for key K
18:21:33.296 [remote-thread-0] TRACE o.i.c.write.InvalidateL1Command - Preparing to
invalidate keys [K]
18:21:33.296 [remote-thread-0] TRACE o.i.c.write.InvalidateL1Command - Invalidating key
K.
18:21:33.296 [remote-thread-0] TRACE o.i.commands.write.RemoveCommand - Nothing to remove
since the entry is null or we have a null entry
{noformat}
While logs of node B show:
{noformat}
18:21:33.200 [OOB-1,AGST-2012000591-33853] TRACE o.i.distribution.L1ManagerImpl -
Registering requestor AGST-2012000591-25400 for key 'K'
18:21:33.266 [remote-thread-1] TRACE o.i.distribution.L1ManagerImpl - Invalidating keys
[K] on nodes [AGST-2012000591-25400]. Use multicast? false
18:21:33.269 [remote-thread-1] TRACE o.i.i.d.L1NonTxInterceptor - Allowing entry to
commit as local node is owner
18:21:33.269 [OOB-2,AGST-2012000591-33853] TRACE o.i.distribution.L1ManagerImpl -
Registering requestor AGST-2012000591-25400 for key 'K'
18:21:33.269 [remote-thread-1] TRACE o.i.i.d.L1NonTxInterceptor - Sending additional
invalidation for requestors if necessary.
18:21:33.269 [remote-thread-1] TRACE o.i.distribution.L1ManagerImpl - Invalidating keys
[K] on nodes [AGST-2012000591-25400]. Use multicast? false
18:21:33.270 [remote-thread-1] INFO p.c.a.ispn.WriteTask - Update task runtime millis 3
18:21:33.271 [OOB-1,AGST-2012000591-33853] TRACE o.i.distribution.L1ManagerImpl -
Registering requestor AGST-2012000591-25400 for key 'K'
18:21:33.293 [remote-thread-1] TRACE o.i.distribution.L1ManagerImpl - Invalidating keys
[K] on nodes [AGST-2012000591-25400]. Use multicast? false
18:21:33.295 [remote-thread-1] TRACE o.i.i.d.L1NonTxInterceptor - Allowing entry to
commit as local node is owner
18:21:33.295 [OOB-2,AGST-2012000591-33853] TRACE o.i.distribution.L1ManagerImpl -
Registering requestor AGST-2012000591-25400 for key 'K'
18:21:33.295 [remote-thread-1] TRACE o.i.i.d.L1NonTxInterceptor - Sending additional
invalidation for requestors if necessary.
18:21:33.295 [remote-thread-1] TRACE o.i.distribution.L1ManagerImpl - Invalidating keys
[K] on nodes [AGST-2012000591-25400]. Use multicast? false
18:21:33.295 [remote-thread-1] INFO p.c.a.ispn.WriteTask - Update task runtime millis 2
18:21:33.476 [remote-thread-1] TRACE o.i.distribution.L1ManagerImpl - No L1 caches to
invalidate for keys [K]
18:21:33.476 [remote-thread-1] TRACE o.i.i.d.L1NonTxInterceptor - Allowing entry to
commit as local node is owner
18:21:33.476 [remote-thread-1] TRACE o.i.i.d.L1NonTxInterceptor - Sending additional
invalidation for requestors if necessary.
18:21:33.476 [remote-thread-1] TRACE o.i.distribution.L1ManagerImpl - No L1 caches to
invalidate for keys [K]
{noformat}
So it seems, that after this:
bq. 'L1 invalidation found a pending update for key K - need to block until
finished'
B no longer knows A holds K in L1, and no longer sends invalidation commands after
updates.
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