stack created HBASE-21646:
-----------------------------

             Summary: Flakey TestTableSnapshotInputFormat; DisableTable not 
completing...
                 Key: HBASE-21646
                 URL: https://issues.apache.org/jira/browse/HBASE-21646
             Project: HBase
          Issue Type: Bug
          Components: test
    Affects Versions: 2.0.3
            Reporter: stack


Fails about 50% of time in the GCE builds... 
https://builds.apache.org/view/H-L/view/HBase/job/HBase-Find-Flaky-Tests/job/branch-2.0/lastSuccessfulBuild/artifact/dashboard.html

We are disabling table to delete at end of test when multi regions and we don't 
complete... pid=21:

{code}
 2018-12-26 20:52:17,179 DEBUG 
[RpcServer.default.FPBQ.Fifo.handler=2,queue=0,port=55246] 
assignment.RegionTransitionProcedure(297): Received report CLOSED seqId=-1, 
pid=27, ppid=21, state=RUNNABLE:REGION_TRANSITION_DISPATCH, locked=true; 
UnassignProcedure                      table=testWithMapReduce, 
region=b66d77b9dd3eaed5b4f8c89872bb56ca, 
server=192.168.1.51,55250,1545886322135; rit=CLOSING, 
location=192.168.1.51,55250,1545886322135
 2018-12-26 20:52:17,179 DEBUG 
[RpcServer.default.FPBQ.Fifo.handler=2,queue=0,port=55246] 
procedure.MasterProcedureScheduler(339): Add TableQueue(testWithMapReduce, 
xlock=false sharedLock=8 size=1) to run queue because: pid=27, ppid=21, 
state=RUNNABLE:                          REGION_TRANSITION_FINISH, locked=true; 
UnassignProcedure table=testWithMapReduce, 
region=b66d77b9dd3eaed5b4f8c89872bb56ca, 
server=192.168.1.51,55250,1545886322135 has lock
 2018-12-26 20:52:17,179 DEBUG 
[RpcServer.default.FPBQ.Fifo.handler=1,queue=0,port=55246] 
assignment.RegionTransitionProcedure(297): Received report CLOSED seqId=-1, 
pid=26, ppid=21, state=RUNNABLE:REGION_TRANSITION_DISPATCH, locked=true; 
UnassignProcedure                      table=testWithMapReduce, 
region=71231f8d1e9b8d4dc83519a6b2b0602a, 
server=192.168.1.51,55250,1545886322135; rit=CLOSING, 
location=192.168.1.51,55250,1545886322135
 2018-12-26 20:52:17,179 DEBUG [PEWorker-1] 
procedure.MasterProcedureScheduler(349): Remove TableQueue(testWithMapReduce, 
xlock=false sharedLock=8 size=0) from run queue because: queue is empty after 
polling out pid=27, ppid=21, state=RUNNABLE:REGION_TRANSITION_FINISH,         
locked=true; UnassignProcedure table=testWithMapReduce, 
region=b66d77b9dd3eaed5b4f8c89872bb56ca, server=192.168.1.51,55250,1545886322135
 2018-12-26 20:52:17,179 DEBUG [PEWorker-1] 
assignment.RegionTransitionProcedure(394): Finishing pid=27, ppid=21, 
state=RUNNABLE:REGION_TRANSITION_FINISH, locked=true; UnassignProcedure 
table=testWithMapReduce, region=b66d77b9dd3eaed5b4f8c89872bb56ca, 
server=192.168.1.51,      55250,1545886322135; rit=CLOSING, 
location=192.168.1.51,55250,1545886322135
 2018-12-26 20:52:17,179 DEBUG 
[RpcServer.default.FPBQ.Fifo.handler=1,queue=0,port=55246] 
procedure.MasterProcedureScheduler(339): Add TableQueue(testWithMapReduce, 
xlock=false sharedLock=8 size=1) to run queue because: pid=26, ppid=21, 
state=RUNNABLE:                          REGION_TRANSITION_FINISH, locked=true; 
UnassignProcedure table=testWithMapReduce, 
region=71231f8d1e9b8d4dc83519a6b2b0602a, 
server=192.168.1.51,55250,1545886322135 has lock
 2018-12-26 20:52:17,180 DEBUG [PEWorker-14] 
procedure.MasterProcedureScheduler(349): Remove TableQueue(testWithMapReduce, 
xlock=false sharedLock=8 size=0) from run queue because: queue is empty after 
polling out pid=26, ppid=21, state=RUNNABLE:REGION_TRANSITION_FINISH,        
locked=true; UnassignProcedure table=testWithMapReduce, 
region=71231f8d1e9b8d4dc83519a6b2b0602a, server=192.168.1.51,55250,1545886322135
 2018-12-26 20:52:17,180 DEBUG [PEWorker-14] 
assignment.RegionTransitionProcedure(394): Finishing pid=26, ppid=21, 
state=RUNNABLE:REGION_TRANSITION_FINISH, locked=true; UnassignProcedure 
table=testWithMapReduce, region=71231f8d1e9b8d4dc83519a6b2b0602a, 
server=192.168.1.51,     55250,1545886322135; rit=CLOSING, 
location=192.168.1.51,55250,1545886322135
 2018-12-26 20:52:17,405 DEBUG 
[RpcServer.default.FPBQ.Fifo.handler=2,queue=0,port=55246] 
master.MasterRpcServices(1152): Checking to see if procedure is done pid=21
 2018-12-26 20:52:17,911 DEBUG 
[RpcServer.default.FPBQ.Fifo.handler=2,queue=0,port=55246] 
master.MasterRpcServices(1152): Checking to see if procedure is done pid=21
 2018-12-26 20:52:18,917 DEBUG 
[RpcServer.default.FPBQ.Fifo.handler=2,queue=0,port=55246] 
master.MasterRpcServices(1152): Checking to see if procedure is done pid=21
 2018-12-26 20:52:20,922 DEBUG 
[RpcServer.default.FPBQ.Fifo.handler=2,queue=0,port=55246] 
master.MasterRpcServices(1152): Checking to see if procedure is done pid=21
 2018-12-26 20:52:24,928 DEBUG 
[RpcServer.default.FPBQ.Fifo.handler=2,queue=0,port=55246] 
master.MasterRpcServices(1152): Checking to see if procedure is done pid=21
 2018-12-26 20:52:34,932 DEBUG 
[RpcServer.default.FPBQ.Fifo.handler=2,queue=0,port=55246] 
master.MasterRpcServices(1152): Checking to see if procedure is done pid=21
 2018-12-26 20:52:44,934 DEBUG 
[RpcServer.default.FPBQ.Fifo.handler=2,queue=0,port=55246] 
master.MasterRpcServices(1152): Checking to see if procedure is done pid=21
 2018-12-26 20:52:54,938 DEBUG 
[RpcServer.default.FPBQ.Fifo.handler=2,queue=0,port=55246] 
master.MasterRpcServices(1152): Checking to see if procedure is done pid=21
 2018-12-26 20:53:04,944 DEBUG 
[RpcServer.default.FPBQ.Fifo.handler=2,queue=0,port=55246] 
master.MasterRpcServices(1152): Checking to see if procedure is done pid=21
{code}

This happens about time of fail of last few pid=21 subprocs:

{code}
 ***** ABORTING region server 192.168.1.51,55250,1545886322135: Caught 
throwable while processing event M_RS_CLOSE_REGION *****
 Cause:
 java.lang.RuntimeException: java.io.IOException: The new max sequence id 6 is 
less than the old max sequence id 7
   at 
org.apache.hadoop.hbase.regionserver.handler.CloseRegionHandler.process(CloseRegionHandler.java:116)
   at org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:104)
   at 
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1135)
   at 
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
   at java.base/java.lang.Thread.run(Thread.java:844)
 Caused by: java.io.IOException: The new max sequence id 6 is less than the old 
max sequence id 7
   at 
org.apache.hadoop.hbase.wal.WALSplitter.writeRegionSequenceIdFile(WALSplitter.java:684)
   at 
org.apache.hadoop.hbase.regionserver.HRegion.writeRegionCloseMarker(HRegion.java:1134)
   at org.apache.hadoop.hbase.regionserver.HRegion.doClose(HRegion.java:1662)
   at org.apache.hadoop.hbase.regionserver.HRegion.close(HRegion.java:1479)
   at 
org.apache.hadoop.hbase.regionserver.handler.CloseRegionHandler.process(CloseRegionHandler.java:104)
   ... 4 more
{code}

Fails for me locally.



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