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From "Jonathan Gray (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-2457) RS gets stuck compacting region ad infinitum
Date Fri, 16 Apr 2010 17:14:26 GMT

    [ https://issues.apache.org/jira/browse/HBASE-2457?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12857889#action_12857889
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Jonathan Gray commented on HBASE-2457:
--------------------------------------

Great stuff todd.  We've been doing a lot of discussion of these same heuristics recently.
 Some recent commits have actually changed some things that will impact what we can/can't
do when deciding which files to compact.  For one, deletes are no longer processed during
minor compactions.  We're also not using (to my knowledge) relative ages of storefiles right
now for anything, so I'm not sure it still holds that we can only compact neighbors.

I plan on working at this stuff during the hackathon.

> RS gets stuck compacting region ad infinitum
> --------------------------------------------
>
>                 Key: HBASE-2457
>                 URL: https://issues.apache.org/jira/browse/HBASE-2457
>             Project: Hadoop HBase
>          Issue Type: Bug
>    Affects Versions: 0.20.4
>            Reporter: Todd Lipcon
>            Priority: Critical
>         Attachments: log.gz, stack
>
>
> Testing 0.20_pre_durability@934643, I ended up in a state where one region server got
stuck compacting a single region over and over again forever. This was with a special config
with very low flush threshold in order to stress test flush/compact code.

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