[
https://issues.apache.org/jira/browse/OAK-4555?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15376456#comment-15376456
]
Francesco Mari commented on OAK-4555:
-------------------------------------
>From the stack trace, and as first noted by [~volteanu] offline, the thread
>that looks blocked is actually in a runnable state. This seems a consequence
>of MATH-578. In Commons Math 2.2 there is a serious performance problem when
>computing the percentile of data that is largely constant. The only solution
>to this problem would be to upgrade to a version of Commons Math that fixes
>this problem.
> Deadlock in CompactionStats.writeNode during online compaction
> --------------------------------------------------------------
>
> Key: OAK-4555
> URL: https://issues.apache.org/jira/browse/OAK-4555
> Project: Jackrabbit Oak
> Issue Type: Bug
> Components: segment-tar
> Affects Versions: Segment Tar 0.0.2
> Reporter: Valentin Olteanu
> Assignee: Francesco Mari
> Attachments: stacktrace.log
>
>
> While running online revision cleanup under high load, the instance reached a
> deadlock (or possible infinite loop).
> Full thread dump is attached, but it seems that:
> 1. Thread-21 tries to commit -> CompactionStats.writeNode -> locked by
> compaction thread
> 2. TarMK compaction thread tries to compact -> print statistics -> infinite
> loop
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
