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https://issues.apache.org/jira/browse/HBASE-21334?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16654606#comment-16654606
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Duo Zhang commented on HBASE-21334:
-----------------------------------

{noformat}
2018-10-17 21:47:44,999 ERROR [Time-limited test] 
procedure2.ProcedureExecutor$2(444): Corrupt pid=22, ppid=19, state=RUNNABLE, 
hasLock=false; org.apache.hadoop.hbase.master.assignment.CloseRegionProcedure
2018-10-17 21:47:45,007 ERROR [Time-limited test] 
procedure2.ProcedureExecutor$2(444): Corrupt pid=19, ppid=18, 
state=WAITING:REGION_STATE_TRANSITION_CONFIRM_CLOSED, hasLock=false; 
TransitRegionStateProcedure table=testMergeWithoutPONR, 
region=3b7371ecf932aa0f7fa0b9a03df56bf2, UNASSIGN
2018-10-17 21:47:45,008 ERROR [Time-limited test] 
procedure2.ProcedureExecutor$2(444): Corrupt pid=20, ppid=18, 
state=RUNNABLE:REGION_STATE_TRANSITION_CONFIRM_CLOSED, hasLock=false; 
TransitRegionStateProcedure table=testMergeWithoutPONR, 
region=55f7f23154a35661b02f91ff421b58d5, UNASSIGN
2018-10-17 21:47:45,009 ERROR [Time-limited test] 
procedure2.ProcedureExecutor$2(444): Corrupt pid=21, ppid=20, state=SUCCESS, 
hasLock=false; org.apache.hadoop.hbase.master.assignment.CloseRegionProcedure
2018-10-17 21:47:45,010 ERROR [Time-limited test] 
procedure2.ProcedureExecutor$2(444): Corrupt pid=18, 
state=WAITING:MERGE_TABLE_REGIONS_CHECK_CLOSED_REGIONS, hasLock=false; 
MergeTableRegionsProcedure table=testMergeWithoutPONR, 
regions=[3b7371ecf932aa0f7fa0b9a03df56bf2, 55f7f23154a35661b02f91ff421b58d5], 
forcibly=false
{noformat}

It is a bit strange, we have the root procedure there(pid = 18). Let me dig 
more...

> TestMergeTableRegionsProcedure is flakey
> ----------------------------------------
>
>                 Key: HBASE-21334
>                 URL: https://issues.apache.org/jira/browse/HBASE-21334
>             Project: HBase
>          Issue Type: Bug
>          Components: amv2, proc-v2
>            Reporter: Duo Zhang
>            Priority: Major
>         Attachments: 
> org.apache.hadoop.hbase.master.assignment.TestMergeTableRegionsProcedure-output.txt
>
>
> {noformat}
> Error Message
> found 5 corrupted procedure(s) on replay
> Stacktrace
> java.io.IOException: found 5 corrupted procedure(s) on replay
>       at 
> org.apache.hadoop.hbase.master.assignment.TestMergeTableRegionsProcedure.testMergeWithoutPONR(TestMergeTableRegionsProcedure.java:295)
> {noformat}



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