[jira] [Created] (FLUME-2786) It will enter a deadlock state when modify the conf file before I stop flume-ng

[godfrey he (JIRA)]

godfrey he created FLUME-2786:
---------------------------------

             Summary:  It will enter a deadlock state when modify the conf file 
before I stop flume-ng
                 Key: FLUME-2786
                 URL: https://issues.apache.org/jira/browse/FLUME-2786
             Project: Flume
          Issue Type: Bug
          Components: Master
    Affects Versions: 1.6
            Reporter: godfrey he
            Priority: Blocker


When modify the conf file，and then I stop the flume-ng,  It will enter a 
deadlock state. 

jstack result:

"agent-shutdown-hook" prio=10 tid=0x00007f2e26419800 nid=0x333ae waiting on 
condition [0x0000000042c16000]

   java.lang.Thread.State: TIMED_WAITING (parking)

        at sun.misc.Unsafe.park(Native Method)

        - parking to wait for  <0x00000000eaff3df8> (a 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)

        at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:226)

        at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2082)

        at 
java.util.concurrent.ThreadPoolExecutor.awaitTermination(ThreadPoolExecutor.java:1468)

        at 
java.util.concurrent.Executors$DelegatedExecutorService.awaitTermination(Executors.java:635)

        at 
org.apache.flume.node.PollingPropertiesFileConfigurationProvider.stop(PollingPropertiesFileConfigurationProvider.java:87)

        at 
org.apache.flume.lifecycle.LifecycleSupervisor.stop(LifecycleSupervisor.java:106)

        - locked <0x00000000eaf2daa0> (a 
org.apache.flume.lifecycle.LifecycleSupervisor)

        at org.apache.flume.node.Application.stop(Application.java:93)

        - locked <0x00000000eaf3c580> (a org.apache.flume.node.Application)

        at org.apache.flume.node.Application$1.run(Application.java:348)



"conf-file-poller-0" prio=10 tid=0x00007f2e2e8cd000 nid=0x21819 waiting for 
monitor entry [0x0000000041e3f000]
   java.lang.Thread.State: BLOCKED (on object monitor)
        at 
org.apache.flume.node.Application.handleConfigurationEvent(Application.java:88)
        - waiting to lock <0x00000000eaf3c580> (a 
org.apache.flume.node.Application)





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