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Posted to issues@hbase.apache.org by "Zach York (JIRA)" <ji...@apache.org> on 2017/12/05 23:37:00 UTC

[jira] [Commented] (HBASE-19435) Reopen Files for ClosedChannelException in BucketCache

    [ https://issues.apache.org/jira/browse/HBASE-19435?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16279382#comment-16279382 ] 

Zach York commented on HBASE-19435:
-----------------------------------

[~chia7712] [~anoop.hbase] Can you take a look when you get a chance?

I think the patch should apply to all branches fairly cleanly, but I can upload patches for any specific branch if necessary.

> 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
>         Attachments: HBASE-19435.master.001.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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