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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-14922) Delayed flush doesn't work causing flush storms.
Date Sat, 05 Dec 2015 19:42:11 GMT

    [ https://issues.apache.org/jira/browse/HBASE-14922?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15043484#comment-15043484

stack commented on HBASE-14922:

I pushed the [~lhofhansl] fix because the cited exception is causing tests to fail ruining
our clean build track record.


Fix looks good to me. If it not [~eclark], we can reevaluate later... committing to get blue
builds back again.

> Delayed flush doesn't work causing flush storms.
> ------------------------------------------------
>                 Key: HBASE-14922
>                 URL: https://issues.apache.org/jira/browse/HBASE-14922
>             Project: HBase
>          Issue Type: Bug
>          Components: regionserver
>    Affects Versions: 2.0.0, 1.2.0, 1.1.2
>            Reporter: Elliott Clark
>            Assignee: Elliott Clark
>             Fix For: 2.0.0, 1.2.0, 1.3.0
>         Attachments: 14922-fix.txt, HBASE-14922-v1.patch, HBASE-14922-v2.patch, HBASE-14922.patch
> Starting all regionservers at the same time will mean that most PeriodicMemstoreFlusher's
will be running at the same time. So all of these threads will queue flushes at about the
same time.
> This was supposed to be mitigated by Delayed. However that isn't nearly enough. This
results in the immediate filling up and then draining of the flush queues every hour.

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