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From "chunhui shen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-7824) Improve master start up time when there is log splitting work
Date Tue, 09 Apr 2013 04:54:19 GMT

    [ https://issues.apache.org/jira/browse/HBASE-7824?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13626226#comment-13626226

chunhui shen commented on HBASE-7824:

bq.HMaster#finishInitialization will put (rs1,001) into deadservers. 
Yes, it's so.
But (rs1,001) will be removed from deadservers by DeadServer#cleanPreviousInstance, you could
take a see about its call hierarchy.

I have poined this in the above comment:
>From DeadServer#cleanPreviousInstance, a deadserver will be removed if the same HostnamePort
servername is online.
It means a server will not belong to deadservers even if it is being processed in SSH. 
> 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-v10.patch, hbase-7824_v2.patch, hbase-7824_v3.patch,
hbase-7824-v7.patch, hbase-7824-v8.patch, hbase-7824-v9.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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