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https://issues.apache.org/jira/browse/HBASE-20657?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16565716#comment-16565716
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stack commented on HBASE-20657:
-------------------------------
Pardon [~sergey.soldatov]. I've been neglectful. I was trying to put off
bringing back big patches to branch-2.0 but I think it unavoidable now, its
only way to shutdown issues like that you've turned up here. I'm trying to be
careful testing each first. I'll be back here to try your provided test after
they've gone in. Thanks.
> Retrying RPC call for ModifyTableProcedure may get stuck
> --------------------------------------------------------
>
> Key: HBASE-20657
> URL: https://issues.apache.org/jira/browse/HBASE-20657
> Project: HBase
> Issue Type: Bug
> Components: Client, proc-v2
> Affects Versions: 2.0.0
> Reporter: Sergey Soldatov
> Assignee: stack
> Priority: Critical
> Fix For: 3.0.0, 2.0.2, 2.1.1
>
> Attachments: HBASE-20657-1-branch-2.patch,
> HBASE-20657-2-branch-2.patch, HBASE-20657-3-branch-2.patch,
> HBASE-20657-4-master.patch, HBASE-20657-testcase-branch2.patch
>
>
> Env: 2 masters, 1 RS.
> Steps to reproduce: Active master is killed while ModifyTableProcedure is
> executed.
> If the table has enough regions it may come that when the secondary master
> get active some of the regions may be closed, so once client retries the call
> to the new active master, a new ModifyTableProcedure is created and get stuck
> during MODIFY_TABLE_REOPEN_ALL_REGIONS state handling. That happens because:
> 1. When we are retrying from client side, we call modifyTableAsync which
> create a procedure with a new nonce key:
> {noformat}
> ModifyTableRequest request =
> RequestConverter.buildModifyTableRequest(
> td.getTableName(), td, ng.getNonceGroup(), ng.newNonce());
> {noformat}
> So on the server side, it's considered as a new procedure and starts
> executing immediately.
> 2. When we are processing MODIFY_TABLE_REOPEN_ALL_REGIONS we create
> MoveRegionProcedure for each region, but it checks whether the region is
> online (and it's not), so it fails immediately, forcing the procedure to
> restart.
> [~an...@apache.org] saw a similar case when two concurrent ModifyTable
> procedures were running and got stuck in the similar way.
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