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https://issues.apache.org/jira/browse/HBASE-22404?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Guanghao Zhang resolved HBASE-22404.
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Resolution: Fixed
> Open/Close region request may be executed twice when master restart
> -------------------------------------------------------------------
>
> Key: HBASE-22404
> URL: https://issues.apache.org/jira/browse/HBASE-22404
> Project: HBase
> Issue Type: Bug
> Affects Versions: 3.0.0, 2.2.0, 2.3.0
> Reporter: Guanghao Zhang
> Assignee: Guanghao Zhang
> Priority: Major
> Fix For: 3.0.0, 2.2.0, 2.3.0
>
>
> We found this problem when run ITBLL for our internal branch which based
> branch-2.2.
> # Master A schedule a TRSP which will reopen region1. And this TRSP firstly
> schdule a sub remote procedure: CloseRegionProcedure and send the close
> region request to RS.
> # Master A shutdown and Master B is the new active master. And restore this
> TRSP and the remote procedure CloseRegionProcedure.
> # RS reported to the new Master B and the CloseRegionProcedure finished.
> Then the TRSP schdule a new OpenRegionProcedure and send open region request
> to RS.
> # {color:#FF0000}But meanwhile Master B send the close region request to RS
> again{color}.
> # The open region request finished firstly and report to master succeed. The
> master thought the region was opened on RS. But the RS excuted the close
> region request again and closed the region1.
> # The Master thought the region opened but the RS closed the region. Then
> the new TRSP will stuck forever.
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