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https://issues.apache.org/jira/browse/HBASE-20006?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16426431#comment-16426431
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Toshihiro Suzuki commented on HBASE-20006:
------------------------------------------

I just reattached the v3 patch to rerun a build.

> TestRestoreSnapshotFromClientWithRegionReplicas is flakey
> ---------------------------------------------------------
>
>                 Key: HBASE-20006
>                 URL: https://issues.apache.org/jira/browse/HBASE-20006
>             Project: HBase
>          Issue Type: Bug
>          Components: read replicas
>            Reporter: stack
>            Assignee: Toshihiro Suzuki
>            Priority: Critical
>         Attachments: HBASE-20006.branch-2.001.patch, 
> HBASE-20006.master.001.patch, HBASE-20006.master.002.patch, 
> HBASE-20006.master.003.patch, HBASE-20006.master.003.patch
>
>
> Failing 10% of the time. Interestingly, it is below that causes fail. We go 
> to split but it is already split. We will then fail the split with an 
> internal assert which messes up procedures; at a minimum we should just not 
> split (this is in the prepare stage).
> {code}
> 2018-02-15 23:21:42,162 INFO  [PEWorker-12] 
> procedure.MasterProcedureScheduler(571): pid=105, 
> state=RUNNABLE:SPLIT_TABLE_REGION_PREPARE; SplitTableRegionProcedure 
> table=testOnlineSnapshotAfterSplittingRegions-1518736887838, 
> parent=3f850cea7d71a7ebd019f2f009efca4d, 
> daughterA=06b5e6366efbef155d70e56cfdf58dc9, 
> daughterB=8c175de1b33765a5683ac1e502edb0bd, 
> table=testOnlineSnapshotAfterSplittingRegions-1518736887838, 
> testOnlineSnapshotAfterSplittingRegions-1518736887838,,1518736887882.3f850cea7d71a7ebd019f2f009efca4d.
> 2018-02-15 23:21:42,162 INFO  [PEWorker-12] 
> assignment.SplitTableRegionProcedure(440): Split of {ENCODED => 
> 3f850cea7d71a7ebd019f2f009efca4d, NAME => 
> 'testOnlineSnapshotAfterSplittingRegions-1518736887838,,1518736887882.3f850cea7d71a7ebd019f2f009efca4d.',
>  STARTKEY => '', ENDKEY => '1'} skipped; state is already SPLIT
> 2018-02-15 23:21:42,163 ERROR [PEWorker-12] 
> procedure2.ProcedureExecutor(1480): CODE-BUG: Uncaught runtime exception: 
> pid=105, state=RUNNABLE:SPLIT_TABLE_REGION_PREPARE; SplitTableRegionProcedure 
> table=testOnlineSnapshotAfterSplittingRegions-1518736887838, 
> parent=3f850cea7d71a7ebd019f2f009efca4d, 
> daughterA=06b5e6366efbef155d70e56cfdf58dc9, 
> daughterB=8c175de1b33765a5683ac1e502edb0bd
> java.lang.AssertionError: split region should have an exception here
>   at 
> org.apache.hadoop.hbase.master.assignment.SplitTableRegionProcedure.executeFromState(SplitTableRegionProcedure.java:228)
>   at 
> org.apache.hadoop.hbase.master.assignment.SplitTableRegionProcedure.executeFromState(SplitTableRegionProcedure.java:89)
>   at 
> org.apache.hadoop.hbase.procedure2.StateMachineProcedure.execute(StateMachineProcedure.java:180)
>   at 
> org.apache.hadoop.hbase.procedure2.Procedure.doExecute(Procedure.java:845)
>   at 
> org.apache.hadoop.hbase.procedure2.ProcedureExecutor.execProcedure(ProcedureExecutor.java:1455)
>   at 
> org.apache.hadoop.hbase.procedure2.ProcedureExecutor.executeProcedure(ProcedureExecutor.java:1224)
>   at 
> org.apache.hadoop.hbase.procedure2.ProcedureExecutor.access$800(ProcedureExecutor.java:78)
>   at 
> org.apache.hadoop.hbase.procedure2.ProcedureExecutor$WorkerThread.run(ProcedureExecutor.java:1734)
> {code}



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