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https://issues.apache.org/jira/browse/JCR-1601?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dominique Pfister resolved JCR-1601.
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Resolution: Fixed
While running the test indicated, some other thread apparently invalidates a
cached *data* instance that has just been returned to thread *Thread-11*, i.e.
it sets the *state* field to null. Checking permissions for a cached instance
before returning it is a new behaviour, which explains why this error did not
occur before.
Fixed by checking the state of the cached data instance before checking
permissions. In the long run, moving this check into ItemData.getState() might
be a better alternative.
> Occasional NullPointerException in ItemManager
> ----------------------------------------------
>
> Key: JCR-1601
> URL: https://issues.apache.org/jira/browse/JCR-1601
> Project: Jackrabbit
> Issue Type: Bug
> Components: jackrabbit-core
> Reporter: Marcel Reutegger
> Assignee: Dominique Pfister
> Priority: Minor
> Fix For: 1.5
>
>
> From time to time I see a NullPointerException in ItemManager when running
> ConcurrentReadWriteTest. The exception is probably caused by another session
> that removes the property, which has the effect that the ItemState in
> ItemData is set to null.
> Exception in thread "Thread-11" java.lang.NullPointerException
> at org.apache.jackrabbit.core.ItemManager.canRead(ItemManager.java:313)
> at
> org.apache.jackrabbit.core.ItemManager.getItemData(ItemManager.java:293)
> at org.apache.jackrabbit.core.ItemManager.getItem(ItemManager.java:226)
> at org.apache.jackrabbit.core.ItemManager.getItem(ItemManager.java:486)
> at
> org.apache.jackrabbit.core.LazyItemIterator.prefetchNext(LazyItemIterator.java:111)
> at
> org.apache.jackrabbit.core.LazyItemIterator.<init>(LazyItemIterator.java:93)
> at
> org.apache.jackrabbit.core.LazyItemIterator.<init>(LazyItemIterator.java:75)
> at
> org.apache.jackrabbit.core.ItemManager.getChildProperties(ItemManager.java:658)
> at org.apache.jackrabbit.core.NodeImpl.getProperties(NodeImpl.java:2663)
> at
> org.apache.jackrabbit.core.ConcurrentReadWriteTest$1$1.execute(ConcurrentReadWriteTest.java:65)
> at
> org.apache.jackrabbit.core.AbstractConcurrencyTest$Executor.run(AbstractConcurrencyTest.java:206)
> at java.lang.Thread.run(Thread.java:595)
> This issue does not occur in a release but only in trunk.
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