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https://issues.apache.org/jira/browse/JCR-549?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jukka Zitting closed JCR-549.
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> TransientFileFactory may throw ConcurrentModificationException on shutdown
> --------------------------------------------------------------------------
>
>                 Key: JCR-549
>                 URL: https://issues.apache.org/jira/browse/JCR-549
>             Project: Jackrabbit
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 0.9, 1.0, 1.0.1
>         Environment: svn: 437594
>            Reporter: Marcel Reutegger
>         Assigned To: Stefan Guggisberg
>            Priority: Minor
>
> When Jackrabbit is stopped the shutdown hook of the TransientFileFactory 
> iterates over all tracked temp files and deletes them. At the same time the 
> reaper thread may still remove file references from the list of tracked temp 
> files. This may lead to a ConcurrentModificationException in the shutdown 
> hook:
> java.util.ConcurrentModificationException
>       at java.util.AbstractList$Itr.checkForComodification(Unknown Source)
>       at java.util.AbstractList$Itr.next(Unknown Source)
>       at 
> org.apache.jackrabbit.util.TransientFileFactory$1.run(TransientFileFactory.java:86)

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