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https://issues.apache.org/jira/browse/HBASE-20589?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16479325#comment-16479325
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stack commented on HBASE-20589:
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bq. Master should create hbase:meta region node from zk when the meta region
already opened?
This sounds right. If we are not doing this, seems like a mistake. For
user-space regions, see how we populate regionstatenode via a scan of
hbase:meta table which has last region state in it.
Thanks for digging into this [~zghaobac]. Good find. And thanks for keeping
with it.
> Don't need to assign meta to a new RS when standby master become active
> -----------------------------------------------------------------------
>
> Key: HBASE-20589
> URL: https://issues.apache.org/jira/browse/HBASE-20589
> Project: HBase
> Issue Type: Bug
> Reporter: Guanghao Zhang
> Assignee: Guanghao Zhang
> Priority: Major
> Attachments: HBASE-20589.master.001.patch,
> HBASE-20589.master.002.patch, HBASE-20589.master.003.patch,
> HBASE-20589.master.003.patch, HBASE-20589.master.004.patch
>
>
> I found this problem when I write ut for HBASE-20569. Now the master
> finishActiveMasterInitialization introduce a new
> RecoverMetaProcedure(HBASE-18261) and it has a sub procedure AssignProcedure.
> AssignProcedure will skip assign a region when regions state is OPEN and
> server is online. But for the new regiog state node is created with state
> OFFLINE. So it will assign the meta to a new RS. And kill the old RS when old
> RS report to master. This will make the master initialization cost a long
> time. I will attatch a ut to show this. FYI [~stack]
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