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From "Himanshu Vashishtha (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-7937) Retry log rolling to support HA NN scenario
Date Sun, 07 Apr 2013 16:37:15 GMT

    [ https://issues.apache.org/jira/browse/HBASE-7937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13624960#comment-13624960

Himanshu Vashishtha commented on HBASE-7937:

Hey Liang, looking at the 0.94 patch, it looks it is redoing what was done by HBaseFileSystem
and HFlogFileSystem. They already have the retrying logic. If we this route, then we will
be defining properties for retry number/wait time, etc for all such processes. 

I am working on something similar to HBASE-8211 for 0.95, and fold the hlog rolling retry
in that effort.
> Retry log rolling to support HA NN scenario
> -------------------------------------------
>                 Key: HBASE-7937
>                 URL: https://issues.apache.org/jira/browse/HBASE-7937
>             Project: HBase
>          Issue Type: Bug
>          Components: wal
>    Affects Versions: 0.94.5
>            Reporter: Himanshu Vashishtha
>            Assignee: Himanshu Vashishtha
>             Fix For: 0.95.1
>         Attachments: HBase-7937-0.94.txt, HBASE-7937-trunk.patch, HBase-7937-trunk.txt,
> A failure in log rolling causes regionserver abort. In case of HA NN, it will be good
if there is a retry mechanism to roll the logs.
> A corresponding jira for MemStore retries is HBASE-7507.

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