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From "Yan Jian (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (FLUME-2786) It will enter a deadlock state when modify the conf file before I stop flume-ng
Date Thu, 03 Nov 2016 12:49:58 GMT

     [ https://issues.apache.org/jira/browse/FLUME-2786?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Yan Jian updated FLUME-2786:
----------------------------
    Attachment: flume-2786-v1.6.0.test.patch
                flume-2786-v1.6.0.patch.1

Hi [~denes], Thanks for your reply. I am so sorry about missing the unit test.
[^flume-2786-v1.6.0.patch.1] contains both fixing and unit test code.
As well, I uploaded a patch [^flume-2786-v1.6.0.test.patch] that only contains unit test code.
Test wont be passed when apply [^flume-2786-v1.6.0.test.patch] to release-1.6.0.

>  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: v1.6.0
>            Reporter: godfrey he
>            Priority: Blocker
>         Attachments: flume-2786-v1.6.0.patch, flume-2786-v1.6.0.patch.1, flume-2786-v1.6.0.test.patch
>
>
> When modify the conf fileļ¼Œand 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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