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https://issues.apache.org/jira/browse/HBASE-7824?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13624612#comment-13624612
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Jeffrey Zhong commented on HBASE-7824:
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{quote}
We can open the META region on RS when ROOT is offline.
{quote}
We need updated META location in ROOT RS when META region is opening on a newly
assigned RS. Is that true? Therefore, a ROOT RS has to be online for a
successful META assignment.
So the open will fail even if META region can be opened but no one can access
it because root is offline and the old location isn't updated to the newly
assigned location. Later Meta region will be re-assigned by MetaSSH.
> 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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