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https://issues.apache.org/jira/browse/HBASE-3571?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13052031#comment-13052031
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Joey Echeverria commented on HBASE-3571:
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I looked at the code, and it looks like this was fixed in HBASE-3797/HBASE-1476.
> Why do we have a lock in CompactSplitThread when only ever one instance of
> this thread?
> ---------------------------------------------------------------------------------------
>
> Key: HBASE-3571
> URL: https://issues.apache.org/jira/browse/HBASE-3571
> Project: HBase
> Issue Type: Task
> Components: regionserver
> Reporter: stack
>
> This lock in CompactSplitThread doesn't do anything best as I can tell:
> {code}
> private final ReentrantLock lock = new ReentrantLock();
> {code}
> If two instances of CompactSplitThread, it would not prevent the two threads
> contending since its local to the instance.
> Remove it.
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