[
https://issues.apache.org/jira/browse/AURORA-50?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Bill Farner resolved AURORA-50.
-------------------------------
Resolution: Fixed
> Scheduler deadlock
> ------------------
>
> Key: AURORA-50
> URL: https://issues.apache.org/jira/browse/AURORA-50
> Project: Aurora
> Issue Type: Bug
> Components: Scheduler
> Reporter: Bill Farner
> Assignee: Bill Farner
> Priority: Blocker
>
> Captured output from jstack:
> {noformat}
> Found one Java-level deadlock:
> =============================
> "cron4j::scheduler[b825ad9442919b58656dd08c00000143930e6d2e3cc88920]::executor[b825ad9442919b5804431808000001439dfe86287be633f2]":
> waiting for ownable synchronizer 0x0000000663057dd0, (a
> java.util.concurrent.locks.ReentrantReadWriteLock$NonfairSync),
> which is held by "TaskScheduler-0"
> "TaskScheduler-0":
> waiting to lock monitor 0x00007fe0d8c98e58 (object 0x0000000663021fc8, a
> org.apache.aurora.scheduler.state.SchedulerCoreImpl),
> which is held by
> "cron4j::scheduler[b825ad9442919b58656dd08c00000143930e6d2e3cc88920]::executor[b825ad9442919b58704e3eda000001439ded211c188378cc]"
> "cron4j::scheduler[b825ad9442919b58656dd08c00000143930e6d2e3cc88920]::executor[b825ad9442919b58704e3eda000001439ded211c188378cc]":
> waiting to lock monitor 0x00007fe034858768 (object 0x0000000662fffab8, a
> org.apache.aurora.scheduler.storage.log.LogStorage$$EnhancerByGuice$$8c0089),
> which is held by "TaskScheduler-0"
> Java stack information for the threads listed above:
> ===================================================
> "cron4j::scheduler[b825ad9442919b58656dd08c00000143930e6d2e3cc88920]::executor[b825ad9442919b5804431808000001439dfe86287be633f2]":
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for <0x0000000663057dd0> (a
> java.util.concurrent.locks.ReentrantReadWriteLock$NonfairSync)
> at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
> at
> java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:834)
> at
> java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireShared(AbstractQueuedSynchronizer.java:964)
> at
> java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireShared(AbstractQueuedSynchronizer.java:1282)
> at
> java.util.concurrent.locks.ReentrantReadWriteLock$ReadLock.lock(ReentrantReadWriteLock.java:731)
> at
> org.apache.aurora.scheduler.storage.ReadWriteLockManager.readLock(ReadWriteLockManager.java:75)
> at
> org.apache.aurora.scheduler.storage.mem.MemStorage.consistentRead(MemStorage.java:114)
> at
> org.apache.aurora.scheduler.storage.mem.MemStorage$$EnhancerByGuice$$aa99778b.CGLIB$consistentRead$1(<generated>)
> at
> org.apache.aurora.scheduler.storage.mem.MemStorage$$EnhancerByGuice$$aa99778b$$FastClassByGuice$$d840358f.invoke(<generated>)
> at
> com.google.inject.internal.cglib.proxy.$MethodProxy.invokeSuper(MethodProxy.java:228)
> at
> com.google.inject.internal.InterceptorStackCallback$InterceptedMethodInvocation.proceed(InterceptorStackCallback.java:72)
> at
> com.twitter.common.inject.TimedInterceptor.invoke(TimedInterceptor.java:87)
> at
> com.google.inject.internal.InterceptorStackCallback$InterceptedMethodInvocation.proceed(InterceptorStackCallback.java:72)
> at
> com.google.inject.internal.InterceptorStackCallback.intercept(InterceptorStackCallback.java:52)
> at
> org.apache.aurora.scheduler.storage.mem.MemStorage$$EnhancerByGuice$$aa99778b.consistentRead(<generated>)
> at
> org.apache.aurora.scheduler.storage.ForwardingStore.consistentRead(ForwardingStore.java:92)
> at
> org.apache.aurora.scheduler.storage.CallOrderEnforcingStorage.consistentRead(CallOrderEnforcingStorage.java:116)
> at
> org.apache.aurora.scheduler.storage.Storage$Util.consistentFetchTasks(Storage.java:279)
> at
> org.apache.aurora.scheduler.state.CronJobManager.cronTriggered(CronJobManager.java:279)
> at
> org.apache.aurora.scheduler.state.CronJobManager$6.run(CronJobManager.java:401)
> at it.sauronsoftware.cron4j.RunnableTask.execute(Unknown Source)
> at it.sauronsoftware.cron4j.TaskExecutor$Runner.run(Unknown Source)
> at java.lang.Thread.run(Thread.java:744)
> "TaskScheduler-0":
> at
> org.apache.aurora.scheduler.state.SchedulerCoreImpl.preemptTask(SchedulerCoreImpl.java:321)
> - waiting to lock <0x0000000663021fc8> (a
> org.apache.aurora.scheduler.state.SchedulerCoreImpl)
> at
> org.apache.aurora.scheduler.async.Preemptor$PreemptorImpl.findPreemptionSlotFor(Preemptor.java:343)
> - locked <0x0000000662f9ba98> (a
> org.apache.aurora.scheduler.async.Preemptor$PreemptorImpl)
> at
> org.apache.aurora.scheduler.async.TaskScheduler$TaskSchedulerImpl.maybePreemptFor(TaskScheduler.java:205)
> at
> org.apache.aurora.scheduler.async.TaskScheduler$TaskSchedulerImpl.access$600(TaskScheduler.java:91)
> at
> org.apache.aurora.scheduler.async.TaskScheduler$TaskSchedulerImpl$2.apply(TaskScheduler.java:173)
> at
> org.apache.aurora.scheduler.async.TaskScheduler$TaskSchedulerImpl$2.apply(TaskScheduler.java:161)
> at
> org.apache.aurora.scheduler.storage.log.LogStorage$7.apply(LogStorage.java:492)
> at
> org.apache.aurora.scheduler.storage.mem.MemStorage.write(MemStorage.java:146)
> at
> org.apache.aurora.scheduler.storage.mem.MemStorage$$EnhancerByGuice$$aa99778b.CGLIB$write$0(<generated>)
> at
> org.apache.aurora.scheduler.storage.mem.MemStorage$$EnhancerByGuice$$aa99778b$$FastClassByGuice$$d840358f.invoke(<generated>)
> at
> com.google.inject.internal.cglib.proxy.$MethodProxy.invokeSuper(MethodProxy.java:228)
> at
> com.google.inject.internal.InterceptorStackCallback$InterceptedMethodInvocation.proceed(InterceptorStackCallback.java:72)
> at
> com.twitter.common.inject.TimedInterceptor.invoke(TimedInterceptor.java:87)
> at
> com.google.inject.internal.InterceptorStackCallback$InterceptedMethodInvocation.proceed(InterceptorStackCallback.java:72)
> at
> com.google.inject.internal.InterceptorStackCallback.intercept(InterceptorStackCallback.java:52)
> at
> org.apache.aurora.scheduler.storage.mem.MemStorage$$EnhancerByGuice$$aa99778b.write(<generated>)
> at
> org.apache.aurora.scheduler.storage.ForwardingStore.write(ForwardingStore.java:105)
> at
> org.apache.aurora.scheduler.storage.log.LogStorage.write(LogStorage.java:490)
> - locked <0x0000000662fffab8> (a
> org.apache.aurora.scheduler.storage.log.LogStorage$$EnhancerByGuice$$8c0089)
> at
> org.apache.aurora.scheduler.storage.CallOrderEnforcingStorage.write(CallOrderEnforcingStorage.java:131)
> "cron4j::scheduler[b825ad9442919b58656dd08c00000143930e6d2e3cc88920]::executor[b825ad9442919b58704e3eda000001439ded211c188378cc]"
> daemon prio=10 tid=0x00007fe02c184000 nid=0xc40a waiting for monitor entry
> [0x0000000055f9f000]
> java.lang.Thread.State: BLOCKED (on object monitor)
> at
> org.apache.aurora.scheduler.storage.log.LogStorage.write(LogStorage.java:474)
> - waiting to lock <0x0000000662fffab8> (a
> org.apache.aurora.scheduler.storage.log.LogStorage$$EnhancerByGuice$$8c0089)
> at
> org.apache.aurora.scheduler.storage.CallOrderEnforcingStorage.write(CallOrderEnforcingStorage.java:131)
> at
> org.apache.aurora.scheduler.state.SideEffectStorage.write(SideEffectStorage.java:88)
> at
> org.apache.aurora.scheduler.state.StateManagerImpl.changeState(StateManagerImpl.java:244)
> at
> org.apache.aurora.scheduler.state.StateManagerImpl.changeState(StateManagerImpl.java:203)
> at
> org.apache.aurora.scheduler.state.SchedulerCoreImpl.killTasks(SchedulerCoreImpl.java:279)
> - locked <0x0000000663021fc8> (a
> org.apache.aurora.scheduler.state.SchedulerCoreImpl)
> at sun.reflect.GeneratedMethodAccessor35.invoke(Unknown Source)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:606)
> at
> com.google.inject.internal.DelegatingInvocationHandler.invoke(DelegatingInvocationHandler.java:37)
> at com.sun.proxy.$Proxy65.killTasks(Unknown Source)
> at
> org.apache.aurora.scheduler.state.CronJobManager.cronTriggered(CronJobManager.java:290)
> at
> org.apache.aurora.scheduler.state.CronJobManager$6.run(CronJobManager.java:401)
> at it.sauronsoftware.cron4j.RunnableTask.execute(Unknown Source)
> at it.sauronsoftware.cron4j.TaskExecutor$Runner.run(Unknown Source)
> at java.lang.Thread.run(Thread.java:744)
> {noformat}
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