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From "Ted Yu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-19435) Reopen Files for ClosedChannelException in BucketCache
Date Thu, 07 Dec 2017 23:33:00 GMT

    [ https://issues.apache.org/jira/browse/HBASE-19435?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16282714#comment-16282714
] 

Ted Yu commented on HBASE-19435:
--------------------------------

Pardon - forgot to note the commit earlier.

If there is any change needed for master branch, please use addendum.

> Reopen Files for ClosedChannelException in BucketCache
> ------------------------------------------------------
>
>                 Key: HBASE-19435
>                 URL: https://issues.apache.org/jira/browse/HBASE-19435
>             Project: HBase
>          Issue Type: Bug
>          Components: BucketCache
>    Affects Versions: 2.0.0, 1.3.1
>            Reporter: Zach York
>            Assignee: Zach York
>             Fix For: 2.0.0-beta-1
>
>         Attachments: HBASE-19435.branch-1.001.patch, HBASE-19435.master.001.patch, HBASE-19435.master.002.patch,
HBASE-19435.master.003.patch, HBASE-19435.master.004.patch, HBASE-19435.master.005.patch,
HBASE-19435.master.006.patch, HBASE-19435.master.007.patch, HBASE-19435.master.007.patch
>
>
> When using the FileIOEngine for BucketCache, the cache will be disabled if the connection
is interrupted or closed. HBase will then get ClosedChannelExceptions trying to access the
file. After 60s, the RS will disable the cache. This causes severe read performance degradation
for workloads that rely on this cache. FileIOEngine never tries to reopen the connection.
This JIRA is to reopen files when the BucketCache encounters a ClosedChannelException.



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