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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-12457) Regions in transition for a long time when CLOSE interleaves with a slow compaction
Date Thu, 13 Nov 2014 17:17:34 GMT

    [ https://issues.apache.org/jira/browse/HBASE-12457?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14210037#comment-14210037
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Andrew Purtell commented on HBASE-12457:
----------------------------------------

Well for whatever reason this change does trigger the above condition, due to some kind of
timing change, because if I go back two commits, before this patch and the addendum, the test
makes progress and completes.

> Regions in transition for a long time when CLOSE interleaves with a slow compaction
> -----------------------------------------------------------------------------------
>
>                 Key: HBASE-12457
>                 URL: https://issues.apache.org/jira/browse/HBASE-12457
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.98.7
>            Reporter: Lars Hofhansl
>            Assignee: Lars Hofhansl
>             Fix For: 2.0.0, 0.98.8, 0.99.2
>
>         Attachments: 12457-combined-0.98-v2.txt, 12457-combined-0.98.txt, 12457-combined-trunk.txt,
12457-minifix.txt, 12457.interrupt-v2.txt, 12457.interrupt.txt, HBASE-12457.patch, HBASE-12457_addendum.patch,
TestRegionReplicas-jstack.txt
>
>
> Under heave load we have observed regions remaining in transition for 20 minutes when
the master requests a close while a slow compaction is running.
> The pattern is always something like this:
> # RS starts a compaction
> # HM request the region to be closed on this RS
> # Compaction is not aborted for another 20 minutes
> # The region is in transition and not usable.
> In every case I tracked down so far the time between the requested CLOSE and abort of
the compaction is almost exactly 20 minutes, which is suspicious.
> Of course part of the issue is having compactions that take over 20 minutes, but maybe
we can do better here.



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