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https://issues.apache.org/jira/browse/HBASE-2448?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12860552#action_12860552
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stack commented on HBASE-2448:
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Actually, I only just now applied this patch to TRUNK.
> Scanner threads are interrupted without acquiring lock properly
> ---------------------------------------------------------------
>
> Key: HBASE-2448
> URL: https://issues.apache.org/jira/browse/HBASE-2448
> Project: Hadoop HBase
> Issue Type: Bug
> Components: master
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Priority: Critical
> Fix For: 0.20.4, 0.20.5, 0.21.0
>
> Attachments: hbase-2448.txt
>
>
> There are a few places where scanner threads are interrupted with
> .interrupt() instead of .interruptIfAlive(). This means that if they're in
> the midst of the checkFileSystem operation, it'll end up catching the
> interruption there, determine that the filesystem is down, and shut down the
> whole server. Other nasties can also result.
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