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From "Andrey Adamovich (JIRA)" <j...@apache.org>
Subject [jira] Issue Comment Edited: (JCR-2160) NPE in XAItemStateManager
Date Wed, 03 Mar 2010 17:44:27 GMT

    [ https://issues.apache.org/jira/browse/JCR-2160?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12840730#action_12840730
] 

Andrey Adamovich edited comment on JCR-2160 at 3/3/10 5:43 PM:
---------------------------------------------------------------

The error line in XAItemStateManager contains:

ChangeLog changeLog = (ChangeLog) commitLogs.get(Thread.currentThread());

The only thing that can be null in that line is the commitLogs. But that is initialized in
the default constructor:

private final Map commitLogs = Collections.synchronizedMap(new IdentityHashMap());

How this could ever be possible?

      was (Author: superfilin):
    That line contains:

ChangeLog changeLog = (ChangeLog) commitLogs.get(Thread.currentThread());

The only thing that can be null in that line is the commitLogs. But that is initialized in
the default constructor:

private final Map commitLogs = Collections.synchronizedMap(new IdentityHashMap());

How this could ever be possible?
  
> NPE in XAItemStateManager
> -------------------------
>
>                 Key: JCR-2160
>                 URL: https://issues.apache.org/jira/browse/JCR-2160
>             Project: Jackrabbit Content Repository
>          Issue Type: Bug
>          Components: jackrabbit-core
>    Affects Versions: 1.5.6
>         Environment: OS: Linux
> JVM: 1.5.0
> Tomcat: 5.5
> Spring extensions: 0.9
> Spring framework: 2.5
> Jackrabbit: 1.5.6
>            Reporter: Jan Schraepen
>
> We're having a NPE during an stress test when using multiple concurrent threads. In this
test we're trying to add multiple versionable items in the repository. This exception causes
a tomcat unavailability. Only killing the tomcat process helps in this case.
> java.lang.NullPointerException
> 	at org.apache.jackrabbit.core.state.XAItemStateManager.stateModified(XAItemStateManager.java:580)
> 	at org.apache.jackrabbit.core.state.StateChangeDispatcher.notifyStateModified(StateChangeDispatcher.java:111)
> 	at org.apache.jackrabbit.core.state.SharedItemStateManager.stateModified(SharedItemStateManager.java:400)
> 	at org.apache.jackrabbit.core.state.StateChangeDispatcher.notifyStateModified(StateChangeDispatcher.java:111)
> 	at org.apache.jackrabbit.core.state.SharedItemStateManager.stateModified(SharedItemStateManager.java:400)
> 	at org.apache.jackrabbit.core.state.ItemState.notifyStateUpdated(ItemState.java:244)
> 	at org.apache.jackrabbit.core.state.ChangeLog.persisted(ChangeLog.java:285)
> 	at org.apache.jackrabbit.core.state.SharedItemStateManager$Update.end(SharedItemStateManager.java:735)
> 	at org.apache.jackrabbit.core.state.XAItemStateManager.commit(XAItemStateManager.java:174)
> 	at org.apache.jackrabbit.core.version.XAVersionManager.commit(XAVersionManager.java:497)
> 	at org.apache.jackrabbit.core.TransactionContext.commit(TransactionContext.java:206)
> 	at org.apache.jackrabbit.core.XASessionImpl.commit(XASessionImpl.java:339)
> 	at org.springframework.extensions.jcr.jackrabbit.support.JackRabbitUserTransaction.commit(JackRabbitUserTransaction.java:95)
> 	at org.springframework.extensions.jcr.jackrabbit.LocalTransactionManager.doCommit(LocalTransactionManager.java:189)
> 	... 39 more
> We could appreciate it, if someone could have a look at this..
> Thanks in advance! 

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