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From "Anoop Sam John (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-20280) Fix possibility of deadlocking in refreshFileConnections when prefetch is enabled
Date Tue, 27 Mar 2018 17:07:00 GMT

    [ https://issues.apache.org/jira/browse/HBASE-20280?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16415937#comment-16415937
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Anoop Sam John commented on HBASE-20280:
----------------------------------------

+1

> Fix possibility of deadlocking in refreshFileConnections when prefetch is enabled
> ---------------------------------------------------------------------------------
>
>                 Key: HBASE-20280
>                 URL: https://issues.apache.org/jira/browse/HBASE-20280
>             Project: HBase
>          Issue Type: Bug
>          Components: BucketCache
>    Affects Versions: 2.0.0-beta-2, 1.4.2
>            Reporter: Zach York
>            Assignee: Zach York
>            Priority: Major
>         Attachments: HBASE-20280.master.001.patch
>
>
> When prefetch on open is specified, there is a deadlocking case
> where if the prefetch is cancelled, the PrefetchExecutor interrupts
> the threads if necessary, when that happens in FileIOEngine, it
> causes an ClosedByInterruptException which is a subclass of
> ClosedChannelException. If we retry all ClosedChannelExceptions,
> this will lock as this access is expected to be interrupted.
> This change removes calling refreshFileConnections for
> ClosedByInterruptExceptions.



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