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https://issues.apache.org/jira/browse/HBASE-20141?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16424519#comment-16424519
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stack commented on HBASE-20141:
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No problem caused. Just for future reference sir.
> Fix TooManyFiles exception when RefreshingChannels in FileIOEngine
> ------------------------------------------------------------------
>
> Key: HBASE-20141
> URL: https://issues.apache.org/jira/browse/HBASE-20141
> Project: HBase
> Issue Type: Bug
> Components: BucketCache
> Affects Versions: 1.4.0, 2.0.0-beta-1, 1.4.2
> Reporter: Zach York
> Assignee: Zach York
> Priority: Major
> Fix For: 1.5.0, 1.4.3, 2.0.0
>
> Attachments: HBASE-20141.master.001.patch,
> HBASE-20141.master.002.patch, HBASE-20141.master.003.patch,
> HBASE-20141.master.004.patch
>
>
> HBASE-19435 implements a fix for reopening file channels when they are
> unnexpected closed
> to avoid disabling the BucketCache. However, it was missed that the the
> channels might not
> actually be completely closed (the write or read channel might still be open
> (see
> https://docs.oracle.com/javase/7/docs/api/java/nio/channels/ClosedChannelException.html)
> This commit closes any open channels before creating a new channel.
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