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From "Thomas Mueller (JIRA)" <j...@apache.org>
Subject [jira] Commented: (JCR-1985) NullPointerException GarbageCollector.scan()
Date Wed, 18 Feb 2009 14:45:02 GMT

    [ https://issues.apache.org/jira/browse/JCR-1985?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12674635#action_12674635
] 

Thomas Mueller commented on JCR-1985:
-------------------------------------

> "programmatic" way to detect

Yes. If this is null then there is no data store:
((RepositoryImpl) s.getRepository()).getDataStore()

Anyway the exception you get is not very clear.
What about this throws a RepositoryException:
((SessionImpl)mSession).createDataStoreGarbageCollector(); 
"No data store configured."

> NullPointerException GarbageCollector.scan()
> --------------------------------------------
>
>                 Key: JCR-1985
>                 URL: https://issues.apache.org/jira/browse/JCR-1985
>             Project: Jackrabbit Content Repository
>          Issue Type: Bug
>          Components: jackrabbit-core
>    Affects Versions: 1.5.2
>         Environment: Windows XP
>            Reporter: Jacco van Weert
>             Fix For: 1.5.3
>
>
> I am running the garbage collector in a separate thread every 5 minutes.
>             GarbageCollector gc = ((SessionImpl)mSession).createDataStoreGarbageCollector();
>             gc.scan();
>             gc.stopScan();
>             int du = gc.deleteUnused();
> When using Jackrabbit v1.5.2 I get sometimes a null pointer exception;
> java.lang.NullPointerException
>         at org.apache.jackrabbit.core.data.GarbageCollector.scan(GarbageCollector.java:153)

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