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https://issues.apache.org/jira/browse/HBASE-18694?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16486517#comment-16486517
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Bo Cui commented on HBASE-18694:
--------------------------------

ok,[~pankaj2461] ,u attach a patch here

> The master switch of ha mode causes region not online
> -----------------------------------------------------
>
>                 Key: HBASE-18694
>                 URL: https://issues.apache.org/jira/browse/HBASE-18694
>             Project: HBase
>          Issue Type: Bug
>          Components: master, Zookeeper
>    Affects Versions: 0.98.10, 1.3.0
>            Reporter: Bo Cui
>            Priority: Major
>         Attachments: Sequence Diagram.jpg, hbase-18694-0.98.10.patch
>
>
> HA mode has two master, firstMaster and secondMaster; at the beginning, 
> SecondMaster is active, firstMaster is standby.
> After secondMaster sends the openregion  request to rs , the rs begins to 
> launch regions, and the secondMaster just happened to be arbor; firstMaster 
> becomes active and receives the zk message (node changed opend), but the 
> region state in firstMaster memory is not opening, firstMaster sends the send 
> closeRegion to rs, the region will never be on-line.
> Other versions should also exist the problem.



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