Attila Doroszlai created HDDS-3719:
--------------------------------------

             Summary: Datanode may fail to stop
                 Key: HDDS-3719
                 URL: https://issues.apache.org/jira/browse/HDDS-3719
             Project: Hadoop Distributed Data Store
          Issue Type: Bug
          Components: Ozone Datanode
            Reporter: Attila Doroszlai


TestOzoneManagerListVolumes timed out after 2 minutes while trying to stop the 
mini cluster.  It seems one of the datanodes was stuck in an infinite loop 
trying to execute a task on a terminated executor:

{code:title=}
2020-06-03 15:28:19,475 [Datanode State Machine Thread - 0] ERROR 
statemachine.DatanodeStateMachine (DatanodeStateMachine.java:start(221)) - 
Unable to finish the execution.
java.util.concurrent.RejectedExecutionException: Task 
java.util.concurrent.ExecutorCompletionService$QueueingFuture@73c36b6c rejected 
from 
org.apache.hadoop.util.concurrent.HadoopThreadPoolExecutor@5c021707[Terminated, 
pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 24]
        at 
java.util.concurrent.ThreadPoolExecutor$AbortPolicy.rejectedExecution(ThreadPoolExecutor.java:2063)
        at 
java.util.concurrent.ThreadPoolExecutor.reject(ThreadPoolExecutor.java:830)
        at 
java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:1379)
        at 
java.util.concurrent.ExecutorCompletionService.submit(ExecutorCompletionService.java:181)
        at 
org.apache.hadoop.ozone.container.common.states.datanode.RunningDatanodeState.execute(RunningDatanodeState.java:143)
        at 
org.apache.hadoop.ozone.container.common.statemachine.StateContext.execute(StateContext.java:411)
        at 
org.apache.hadoop.ozone.container.common.statemachine.DatanodeStateMachine.start(DatanodeStateMachine.java:208)
        at 
org.apache.hadoop.ozone.container.common.statemachine.DatanodeStateMachine.lambda$startDaemon$0(DatanodeStateMachine.java:375)
        at java.lang.Thread.run(Thread.java:748)
{code}

{code:title=grep -c 'Unable to finish the execution' 
hadoop-ozone/integration-test/org.apache.hadoop.ozone.om.TestOzoneManagerListVolumes-output.txt}
2087250
{code}

Test output eventually grew to 2.6GB.

https://github.com/apache/hadoop-ozone/runs/735169623



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