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From "Jeffrey Zhong (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-7824) Improve master start up time when there is log splitting work
Date Sun, 07 Apr 2013 08:37:17 GMT

    [ https://issues.apache.org/jira/browse/HBASE-7824?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13624789#comment-13624789
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Jeffrey Zhong commented on HBASE-7824:
--------------------------------------

Yep, I've taken care of that. Basically, synchronized log split tasks before SSH is enabled.
Once you agree the approach in general, I'll submit the modified patch for review.

A question through: Should we do expireServer firstly and then do log splitting after we have
the log splitting synchronization mechanism before SSH is enabled.

                
> Improve master start up time when there is log splitting work
> -------------------------------------------------------------
>
>                 Key: HBASE-7824
>                 URL: https://issues.apache.org/jira/browse/HBASE-7824
>             Project: HBase
>          Issue Type: Bug
>          Components: master
>            Reporter: Jeffrey Zhong
>            Assignee: Jeffrey Zhong
>             Fix For: 0.94.8
>
>         Attachments: hbase-7824.patch, hbase-7824_v2.patch, hbase-7824_v3.patch, hbase-7824-v7.patch,
hbase-7824-v8.patch
>
>
> When there is log split work going on, master start up waits till all log split work
completes even though the log split has nothing to do with meta region servers.
> It's a bad behavior considering a master node can run when log split is happening while
its start up is blocking by log split work. 
> Since master is kind of single point of failure, we should start it ASAP.

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