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Posted to issues@flume.apache.org by "ASF subversion and git services (JIRA)" <ji...@apache.org> on 2018/03/09 11:08:00 UTC
[jira] [Commented] (FLUME-3056) TestApplication hangs indefinitely
[ https://issues.apache.org/jira/browse/FLUME-3056?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16392719#comment-16392719 ]
ASF subversion and git services commented on FLUME-3056:
--------------------------------------------------------
Commit 0d437810dc850192b48fa3b31608ffcd23b1f1e9 in flume's branch refs/heads/trunk from [~andrasbeni]
[ https://git-wip-us.apache.org/repos/asf?p=flume.git;h=0d43781 ]
FLUME-2786 FLUME-3056 FLUME-3117 Application enters a deadlock when stopped while handleConfigurationEvent
Adding better locking mechanism to Application class to prevent deadlock.
this closes #108
this closes #144
Revievers: Denes Arvay, Attila Simon, Benedict Jin, Ferenc Szabo
(Andras Beni, Yan Jian via Ferenc Szabo)
> TestApplication hangs indefinitely
> ----------------------------------
>
> Key: FLUME-3056
> URL: https://issues.apache.org/jira/browse/FLUME-3056
> Project: Flume
> Issue Type: Bug
> Components: Configuration, Test
> Affects Versions: 1.7.0
> Reporter: Andras Beni
> Assignee: Andras Beni
> Priority: Minor
>
> Unit test hangs indefinitely when TestApplication.testFLUME1854() becomes blocked in the following, deadlock-like situation:
> Application waits for PollingPropertiesFileConfigurationProvider to stop while PollingPropertiesFileConfigurationProvider tries to notify Application of configuration change.
> {noformat}
> "conf-file-poller-0" #17750 prio=5 os_prio=31 tid=0x00007fdeb7972000 nid=0x638f waiting for monitor entry [0x000070000eb36000]
> java.lang.Thread.State: BLOCKED (on object monitor)
> at org.apache.flume.node.Application.handleConfigurationEvent(Application.java:87)
> - waiting to lock <0x000000077a130178> (a org.apache.flume.node.Application)
> at sun.reflect.GeneratedMethodAccessor6.invoke(Unknown Source)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:68)
> at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
> - locked <0x000000077a1301b0> (a com.google.common.eventbus.SynchronizedEventHandler)
> at com.google.common.eventbus.EventBus.dispatch(EventBus.java:313)
> at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)
> at com.google.common.eventbus.EventBus.post(EventBus.java:264)
> at org.apache.flume.node.PollingPropertiesFileConfigurationProvider$FileWatcherRunnable.run(PollingPropertiesFileConfigurationProvider.java:141)
> at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
> at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
> at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> Locked ownable synchronizers:
> - <0x000000077a130250> (a java.util.concurrent.ThreadPoolExecutor$Worker)
> "main" #1 prio=5 os_prio=31 tid=0x00007fdeb9000000 nid=0x1b03 waiting on condition [0x000070000d779000]
> java.lang.Thread.State: TIMED_WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for <0x00000006c253e9f8> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
> at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
> at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
> at java.util.concurrent.ThreadPoolExecutor.awaitTermination(ThreadPoolExecutor.java:1465)
> at java.util.concurrent.Executors$DelegatedExecutorService.awaitTermination(Executors.java:675)
> at org.apache.flume.node.PollingPropertiesFileConfigurationProvider.stop(PollingPropertiesFileConfigurationProvider.java:88)
> at org.apache.flume.lifecycle.LifecycleSupervisor.stop(LifecycleSupervisor.java:104)
> - locked <0x000000077a138158> (a org.apache.flume.lifecycle.LifecycleSupervisor)
> at org.apache.flume.node.Application.stop(Application.java:92)
> - locked <0x000000077a130178> (a org.apache.flume.node.Application)
> at org.apache.flume.node.TestApplication.testFLUME1854(TestApplication.java:155)
> {noformat}
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