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https://issues.apache.org/jira/browse/HBASE-20589?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16478796#comment-16478796
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Guanghao Zhang commented on HBASE-20589:
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Add a 004 patch. Add one line change in AssignProcedure. If the meta region
already opened, it need finishTransition, too. As it will call
AM.markRegionAsOpened in finishTransition. This is nesserary to tell AM that
the meta is initialized.
> 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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