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https://issues.apache.org/jira/browse/OAK-2768?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Marcel Reutegger resolved OAK-2768.
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Resolution: Fixed
Fair mode is now the default in trunk: http://svn.apache.org/r1692257
> Fair mode for backgroundOperationLock
> -------------------------------------
>
> Key: OAK-2768
> URL: https://issues.apache.org/jira/browse/OAK-2768
> Project: Jackrabbit Oak
> Issue Type: Improvement
> Components: core, mongomk
> Reporter: Marcel Reutegger
> Assignee: Marcel Reutegger
> Labels: concurrency
> Fix For: 1.3.4
>
> Attachments: lock time.png
>
>
> The backgroundOperationLock in DocumentNodeStore uses the default non-fair
> acquisition order. According to JavaDoc of ReentrantReadWriteLock it is
> possible that a background operation task gets delayed for a long time when
> the system is under load. We should probably consider using the fair mode for
> the backgroundOperationLock to make sure background operation tasks do not
> get delayed excessively.
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