Hallo,
after many trys to run the cluster under pessimistic locking, we want to change
to optimistic locking.
Our cache has a lot of node like
/sentinel/[sessionId]
and /sentinel_Commands/[sessionId]
where [sessionId] is a unique identifier of an user. So the number of this
Fqn will scale with the number of logged in users.
All this nodes will be changed frequently. When I use the optimistic locking
I got the following exception during the commit phase and I'm mostly surprised
about the line:
Caused by: org.jboss.cache.CacheException: DataNode [/] version Ver=74 is newer
than workspace node Ver=73
Means this each change on a sub node will also increase the version of the root
node and the commit phase will only work if there was no change in the complete
treecache?
How it's possible that a commit works than if many cluster nodes will do
changes on different (sub)nodes in the tree cache?
2006-09-21 09:52:23,321 [SentinelServerAgent_105] ERROR
org.jboss.cache.transaction.DummyTransaction - beforeCompletion() failed for
[EMAIL PROTECTED],
handlers=[TxInterceptor.LocalSynchronizationHandler(gtx=GlobalTransaction:<192.168.4.174:7800>:78,
[EMAIL PROTECTED])]
java.lang.RuntimeException:
at
org.jboss.cache.interceptors.TxInterceptor$LocalSynchronizationHandler.beforeCompletion(TxInterceptor.java:1091)
at
org.jboss.cache.interceptors.OrderedSynchronizationHandler.beforeCompletion(OrderedSynchronizationHandler.java:75)
at
org.jboss.cache.transaction.DummyTransaction.notifyBeforeCompletion(DummyTransaction.java:247)
at
org.jboss.cache.transaction.DummyTransaction.commit(DummyTransaction.java:54)
at
org.jboss.cache.transaction.DummyBaseTransactionManager.commit(DummyBaseTransactionManager.java:61)
at
com.xtramind.common.distributed.DefaultDistributedResourceAgent.putData(DefaultDistributedResourceAgent.java:526)
at
com.xtramind.common.distributed.DefaultDistributedResourceManager.putData(DefaultDistributedResourceManager.java:167)
at
com.xtramind.common.sentinel.server.DefaultSentinelServerAgent.addCommand(DefaultSentinelServerAgent.java:805)
at
com.xtramind.common.sentinel.server.DefaultSentinelServerAgent.answerToServerPing(DefaultSentinelServerAgent.java:255)
at
com.xtramind.common.sentinel.server.DefaultSentinelServerAgent.run(DefaultSentinelServerAgent.java:320)
at java.lang.Thread.run(Thread.java:595)
Caused by: org.jboss.cache.CacheException: DataNode [/] version Ver=74 is newer
than workspace node Ver=73
at
org.jboss.cache.interceptors.OptimisticValidatorInterceptor.simpleValidate(OptimisticValidatorInterceptor.java:127)
at
org.jboss.cache.interceptors.OptimisticValidatorInterceptor.validateNodes(OptimisticValidatorInterceptor.java:101)
at
org.jboss.cache.interceptors.OptimisticValidatorInterceptor.invoke(OptimisticValidatorInterceptor.java:66)
at org.jboss.cache.interceptors.Interceptor.invoke(Interceptor.java:68)
at
org.jboss.cache.interceptors.OptimisticLockingInterceptor.invoke(OptimisticLockingInterceptor.java:95)
at org.jboss.cache.interceptors.Interceptor.invoke(Interceptor.java:68)
at
org.jboss.cache.interceptors.OptimisticReplicationInterceptor.invoke(OptimisticReplicationInterceptor.java:74)
at org.jboss.cache.interceptors.Interceptor.invoke(Interceptor.java:68)
at
org.jboss.cache.interceptors.TxInterceptor.runPreparePhase(TxInterceptor.java:804)
at
org.jboss.cache.interceptors.TxInterceptor$LocalSynchronizationHandler.beforeCompletion(TxInterceptor.java:1069)
Thanks for help
JL
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