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From "Eric Newton (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-4016) compaction queued, but not running
Date Fri, 02 Oct 2015 18:19:26 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-4016?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14941522#comment-14941522
] 

Eric Newton commented on ACCUMULO-4016:
---------------------------------------

ACCUMULO-2292 modified TraceRunnable to forward equals to compareTo. The compareTo on CompactionRunner
will return 0 when the objects are not the same.  Therefore, the CompactionRunner, wrapped
by a TraceRunnable would use compareTo to remove objects from the queue. If the number of
files in a tablet changed due to bulk import, the remove might remove the wrong object.

Thanks to [~kturner] for finding this little gem.

This may also be another cause for ACCUMULO-3462.

> compaction queued, but not running
> ----------------------------------
>
>                 Key: ACCUMULO-4016
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-4016
>             Project: Accumulo
>          Issue Type: Bug
>          Components: tserver
>    Affects Versions: 1.5.4, 1.6.3, 1.6.4, 1.7.0
>            Reporter: Eric Newton
>            Assignee: Eric Newton
>            Priority: Critical
>             Fix For: 1.6.5, 1.7.1
>
>
> Monitor is showing zero compactions running but some queued for long periods of time.



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