Guanghao Zhang commented on HBASE-20589:

Add a fix in 002 patch. It will save the OPENED meta region state to region 
stats. So the AssignProcedure will get OPENED region state and skip the region 

> 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
> 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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