[jira] Closed: (OPENJPA-1379) Locking problem when using timestamp QueryCache eviction policy.

["Rick Curtis (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/OPENJPA-1379?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Rick Curtis closed OPENJPA-1379.
--------------------------------

    Resolution: Fixed

This issue is fixed in trunk.

> Locking problem when using timestamp QueryCache eviction policy.
> ----------------------------------------------------------------
>
>                 Key: OPENJPA-1379
>                 URL: https://issues.apache.org/jira/browse/OPENJPA-1379
>             Project: OpenJPA
>          Issue Type: Bug
>          Components: datacache
>    Affects Versions: 2.0.0-M3
>            Reporter: Rick Curtis
>            Assignee: Rick Curtis
>             Fix For: 2.0.0-M4
>
>
> I ran into a bug in AbstractQueryCache when using the timestamp QueryCache eviction policy. This is only a problem when running in a multithreaded environment.
> The net of the problem is that in AbstractQueryCache.onTypesChanged(TypesChangedEvent ev) we call writeLock(), but when using the non-default eviction policy we never call writeUnlock(). As a result, any other threads requesting a writeLock on the cache will block indefinitely.

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