[
https://issues.apache.org/jira/browse/AURORA-801?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Kevin Sweeney updated AURORA-801:
---------------------------------
Description:
The recently-added update code adds a deadlock to the scheduler whenever there
are concurrent {{TasksDeleted}} and {{TaskStateChange}} events on the EventBus.
Relevant bits from /threads
{noformat}
Name: AsyncProcessor-0
State: BLOCKED
Daemon: true
ID: 2461
org.apache.aurora.scheduler.updater.JobUpdateEventSubscriber.tasksDeleted(JobUpdateEventSubscriber.java:64)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:606)
com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
com.google.common.eventbus.EventBus.post(EventBus.java:275)
org.apache.aurora.scheduler.events.PubsubEventModule$2.post(PubsubEventModule.java:68)
org.apache.aurora.scheduler.state.StateManagerImpl.updateTaskAndExternalState(StateManagerImpl.java:443)
org.apache.aurora.scheduler.state.StateManagerImpl.access$100(StateManagerImpl.java:80)
org.apache.aurora.scheduler.state.StateManagerImpl$8.execute(StateManagerImpl.java:460)
org.apache.aurora.scheduler.storage.Storage$MutateWork$NoResult.apply(Storage.java:132)
org.apache.aurora.scheduler.storage.Storage$MutateWork$NoResult$Quiet.apply(Storage.java:149)
org.apache.aurora.scheduler.storage.log.LogStorage$7.apply(LogStorage.java:559)
org.apache.aurora.scheduler.storage.log.LogStorage$7.apply(LogStorage.java:556)
org.apache.aurora.scheduler.storage.mem.MemStorage.doWork(MemStorage.java:175)
org.apache.aurora.scheduler.storage.mem.MemStorage.access$400(MemStorage.java:59)
org.apache.aurora.scheduler.storage.mem.MemStorage$4.apply(MemStorage.java:200)
org.apache.aurora.scheduler.storage.mem.MemStorage$4.apply(MemStorage.java:197)
org.apache.aurora.scheduler.storage.db.DbStorage.write(DbStorage.java:150)
org.apache.aurora.scheduler.storage.db.DbStorage$$EnhancerByGuice$$51136dc.CGLIB$write$0(<generated>)
org.apache.aurora.scheduler.storage.db.DbStorage$$EnhancerByGuice$$51136dc$$FastClassByGuice$$8e80cfa0.invoke(<generated>)
com.google.inject.internal.cglib.proxy.$MethodProxy.invokeSuper(MethodProxy.java:228)
com.google.inject.internal.InterceptorStackCallback$InterceptedMethodInvocation.proceed(InterceptorStackCallback.java:72)
org.mybatis.guice.transactional.TransactionalMethodInterceptor.invoke(TransactionalMethodInterceptor.java:101)
com.google.inject.internal.InterceptorStackCallback$InterceptedMethodInvocation.proceed(InterceptorStackCallback.java:72)
com.google.inject.internal.InterceptorStackCallback.intercept(InterceptorStackCallback.java:52)
org.apache.aurora.scheduler.storage.db.DbStorage$$EnhancerByGuice$$51136dc.write(<generated>)
org.apache.aurora.scheduler.storage.mem.MemStorage.write(MemStorage.java:197)
org.apache.aurora.scheduler.storage.log.LogStorage.write(LogStorage.java:556)
org.apache.aurora.scheduler.storage.CallOrderEnforcingStorage.write(CallOrderEnforcingStorage.java:130)
org.apache.aurora.scheduler.state.StateManagerImpl.deleteTasks(StateManagerImpl.java:451)
org.apache.aurora.scheduler.async.HistoryPruner.deleteTasks(HistoryPruner.java:126)
org.apache.aurora.scheduler.async.HistoryPruner.access$500(HistoryPruner.java:51)
org.apache.aurora.scheduler.async.HistoryPruner$3.run(HistoryPruner.java:164)
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
java.util.concurrent.FutureTask.run(FutureTask.java:262)
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:178)
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:292)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
java.lang.Thread.run(Thread.java:745)
Name: Lifecycle-0
State: BLOCKED
Daemon: true
ID: 2462
org.apache.aurora.scheduler.storage.log.LogStorage.write(LogStorage.java:544)
org.apache.aurora.scheduler.storage.CallOrderEnforcingStorage.write(CallOrderEnforcingStorage.java:130)
org.apache.aurora.scheduler.updater.JobUpdateControllerImpl.systemResume(JobUpdateControllerImpl.java:195)
org.apache.aurora.scheduler.updater.JobUpdateEventSubscriber.schedulerActive(JobUpdateEventSubscriber.java:83)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:606)
com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
com.google.common.eventbus.EventBus.post(EventBus.java:275)
org.apache.aurora.scheduler.events.PubsubEventModule$2.post(PubsubEventModule.java:68)
org.apache.aurora.scheduler.SchedulerLifecycle$7$2.run(SchedulerLifecycle.java:336)
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
java.util.concurrent.FutureTask.run(FutureTask.java:262)
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:178)
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:292)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
java.lang.Thread.run(Thread.java:745)
{noformat}
was:
The recently-added update code adds a deadlock to the scheduler whenever there
are concurrent {{TasksDeleted}} and {{TaskStateChange}} events on the EventBus.
Relevant bits from /threads
{noformat}
Name: AsyncProcessor-0
State: BLOCKED
Daemon: true
ID: 2461
org.apache.aurora.scheduler.updater.JobUpdateEventSubscriber.tasksDeleted(JobUpdateEventSubscriber.java:64)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:606)
com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
com.google.common.eventbus.EventBus.post(EventBus.java:275)
org.apache.aurora.scheduler.events.PubsubEventModule$2.post(PubsubEventModule.java:68)
org.apache.aurora.scheduler.state.StateManagerImpl.updateTaskAndExternalState(StateManagerImpl.java:443)
org.apache.aurora.scheduler.state.StateManagerImpl.access$100(StateManagerImpl.java:80)
org.apache.aurora.scheduler.state.StateManagerImpl$8.execute(StateManagerImpl.java:460)
org.apache.aurora.scheduler.storage.Storage$MutateWork$NoResult.apply(Storage.java:132)
org.apache.aurora.scheduler.storage.Storage$MutateWork$NoResult$Quiet.apply(Storage.java:149)
org.apache.aurora.scheduler.storage.log.LogStorage$7.apply(LogStorage.java:559)
org.apache.aurora.scheduler.storage.log.LogStorage$7.apply(LogStorage.java:556)
org.apache.aurora.scheduler.storage.mem.MemStorage.doWork(MemStorage.java:175)
org.apache.aurora.scheduler.storage.mem.MemStorage.access$400(MemStorage.java:59)
org.apache.aurora.scheduler.storage.mem.MemStorage$4.apply(MemStorage.java:200)
org.apache.aurora.scheduler.storage.mem.MemStorage$4.apply(MemStorage.java:197)
org.apache.aurora.scheduler.storage.db.DbStorage.write(DbStorage.java:150)
org.apache.aurora.scheduler.storage.db.DbStorage$$EnhancerByGuice$$51136dc.CGLIB$write$0(<generated>)
org.apache.aurora.scheduler.storage.db.DbStorage$$EnhancerByGuice$$51136dc$$FastClassByGuice$$8e80cfa0.invoke(<generated>)
com.google.inject.internal.cglib.proxy.$MethodProxy.invokeSuper(MethodProxy.java:228)
com.google.inject.internal.InterceptorStackCallback$InterceptedMethodInvocation.proceed(InterceptorStackCallback.java:72)
org.mybatis.guice.transactional.TransactionalMethodInterceptor.invoke(TransactionalMethodInterceptor.java:101)
com.google.inject.internal.InterceptorStackCallback$InterceptedMethodInvocation.proceed(InterceptorStackCallback.java:72)
com.google.inject.internal.InterceptorStackCallback.intercept(InterceptorStackCallback.java:52)
org.apache.aurora.scheduler.storage.db.DbStorage$$EnhancerByGuice$$51136dc.write(<generated>)
org.apache.aurora.scheduler.storage.mem.MemStorage.write(MemStorage.java:197)
org.apache.aurora.scheduler.storage.log.LogStorage.write(LogStorage.java:556)
org.apache.aurora.scheduler.storage.CallOrderEnforcingStorage.write(CallOrderEnforcingStorage.java:130)
org.apache.aurora.scheduler.state.StateManagerImpl.deleteTasks(StateManagerImpl.java:451)
org.apache.aurora.scheduler.async.HistoryPruner.deleteTasks(HistoryPruner.java:126)
org.apache.aurora.scheduler.async.HistoryPruner.access$500(HistoryPruner.java:51)
org.apache.aurora.scheduler.async.HistoryPruner$3.run(HistoryPruner.java:164)
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
java.util.concurrent.FutureTask.run(FutureTask.java:262)
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:178)
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:292)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
java.lang.Thread.run(Thread.java:745)
Name: TaskScheduler-0
State: BLOCKED
Daemon: true
ID: 2460
org.apache.aurora.scheduler.storage.log.LogStorage.write(LogStorage.java:544)
org.apache.aurora.scheduler.storage.CallOrderEnforcingStorage.write(CallOrderEnforcingStorage.java:130)
org.apache.aurora.scheduler.async.TaskScheduler$TaskSchedulerImpl.schedule(TaskScheduler.java:182)
org.apache.aurora.scheduler.async.TaskScheduler$TaskSchedulerImpl$$EnhancerByGuice$$b669120f.CGLIB$schedule$0(<generated>)
org.apache.aurora.scheduler.async.TaskScheduler$TaskSchedulerImpl$$EnhancerByGuice$$b669120f$$FastClassByGuice$$2204e025.invoke(<generated>)
com.google.inject.internal.cglib.proxy.$MethodProxy.invokeSuper(MethodProxy.java:228)
com.google.inject.internal.InterceptorStackCallback$InterceptedMethodInvocation.proceed(InterceptorStackCallback.java:72)
com.twitter.common.inject.TimedInterceptor.invoke(TimedInterceptor.java:87)
com.google.inject.internal.InterceptorStackCallback$InterceptedMethodInvocation.proceed(InterceptorStackCallback.java:72)
com.google.inject.internal.InterceptorStackCallback.intercept(InterceptorStackCallback.java:52)
org.apache.aurora.scheduler.async.TaskScheduler$TaskSchedulerImpl$$EnhancerByGuice$$b669120f.schedule(<generated>)
org.apache.aurora.scheduler.async.TaskGroups$1.schedule(TaskGroups.java:122)
org.apache.aurora.scheduler.async.TaskGroups$2.run(TaskGroups.java:144)
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
java.util.concurrent.FutureTask.run(FutureTask.java:262)
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:178)
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:292)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
java.lang.Thread.run(Thread.java:745)
Name: Lifecycle-0
State: BLOCKED
Daemon: true
ID: 2462
org.apache.aurora.scheduler.storage.log.LogStorage.write(LogStorage.java:544)
org.apache.aurora.scheduler.storage.CallOrderEnforcingStorage.write(CallOrderEnforcingStorage.java:130)
org.apache.aurora.scheduler.updater.JobUpdateControllerImpl.systemResume(JobUpdateControllerImpl.java:195)
org.apache.aurora.scheduler.updater.JobUpdateEventSubscriber.schedulerActive(JobUpdateEventSubscriber.java:83)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:606)
com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
com.google.common.eventbus.EventBus.post(EventBus.java:275)
org.apache.aurora.scheduler.events.PubsubEventModule$2.post(PubsubEventModule.java:68)
org.apache.aurora.scheduler.SchedulerLifecycle$7$2.run(SchedulerLifecycle.java:336)
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
java.util.concurrent.FutureTask.run(FutureTask.java:262)
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:178)
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:292)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
java.lang.Thread.run(Thread.java:745)
{noformat}
> deadlock in scheduler startup
> -----------------------------
>
> Key: AURORA-801
> URL: https://issues.apache.org/jira/browse/AURORA-801
> Project: Aurora
> Issue Type: Bug
> Components: Scheduler
> Reporter: Kevin Sweeney
> Priority: Blocker
>
> The recently-added update code adds a deadlock to the scheduler whenever
> there are concurrent {{TasksDeleted}} and {{TaskStateChange}} events on the
> EventBus.
> Relevant bits from /threads
> {noformat}
> Name: AsyncProcessor-0
> State: BLOCKED
> Daemon: true
> ID: 2461
>
> org.apache.aurora.scheduler.updater.JobUpdateEventSubscriber.tasksDeleted(JobUpdateEventSubscriber.java:64)
> sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
>
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> java.lang.reflect.Method.invoke(Method.java:606)
>
> com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
>
> com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
> com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
>
> com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
> com.google.common.eventbus.EventBus.post(EventBus.java:275)
>
> org.apache.aurora.scheduler.events.PubsubEventModule$2.post(PubsubEventModule.java:68)
>
> org.apache.aurora.scheduler.state.StateManagerImpl.updateTaskAndExternalState(StateManagerImpl.java:443)
>
> org.apache.aurora.scheduler.state.StateManagerImpl.access$100(StateManagerImpl.java:80)
>
> org.apache.aurora.scheduler.state.StateManagerImpl$8.execute(StateManagerImpl.java:460)
>
> org.apache.aurora.scheduler.storage.Storage$MutateWork$NoResult.apply(Storage.java:132)
>
> org.apache.aurora.scheduler.storage.Storage$MutateWork$NoResult$Quiet.apply(Storage.java:149)
>
> org.apache.aurora.scheduler.storage.log.LogStorage$7.apply(LogStorage.java:559)
>
> org.apache.aurora.scheduler.storage.log.LogStorage$7.apply(LogStorage.java:556)
>
> org.apache.aurora.scheduler.storage.mem.MemStorage.doWork(MemStorage.java:175)
>
> org.apache.aurora.scheduler.storage.mem.MemStorage.access$400(MemStorage.java:59)
>
> org.apache.aurora.scheduler.storage.mem.MemStorage$4.apply(MemStorage.java:200)
>
> org.apache.aurora.scheduler.storage.mem.MemStorage$4.apply(MemStorage.java:197)
> org.apache.aurora.scheduler.storage.db.DbStorage.write(DbStorage.java:150)
>
> org.apache.aurora.scheduler.storage.db.DbStorage$$EnhancerByGuice$$51136dc.CGLIB$write$0(<generated>)
>
> org.apache.aurora.scheduler.storage.db.DbStorage$$EnhancerByGuice$$51136dc$$FastClassByGuice$$8e80cfa0.invoke(<generated>)
>
> com.google.inject.internal.cglib.proxy.$MethodProxy.invokeSuper(MethodProxy.java:228)
>
> com.google.inject.internal.InterceptorStackCallback$InterceptedMethodInvocation.proceed(InterceptorStackCallback.java:72)
>
> org.mybatis.guice.transactional.TransactionalMethodInterceptor.invoke(TransactionalMethodInterceptor.java:101)
>
> com.google.inject.internal.InterceptorStackCallback$InterceptedMethodInvocation.proceed(InterceptorStackCallback.java:72)
>
> com.google.inject.internal.InterceptorStackCallback.intercept(InterceptorStackCallback.java:52)
>
> org.apache.aurora.scheduler.storage.db.DbStorage$$EnhancerByGuice$$51136dc.write(<generated>)
>
> org.apache.aurora.scheduler.storage.mem.MemStorage.write(MemStorage.java:197)
>
> org.apache.aurora.scheduler.storage.log.LogStorage.write(LogStorage.java:556)
>
> org.apache.aurora.scheduler.storage.CallOrderEnforcingStorage.write(CallOrderEnforcingStorage.java:130)
>
> org.apache.aurora.scheduler.state.StateManagerImpl.deleteTasks(StateManagerImpl.java:451)
>
> org.apache.aurora.scheduler.async.HistoryPruner.deleteTasks(HistoryPruner.java:126)
>
> org.apache.aurora.scheduler.async.HistoryPruner.access$500(HistoryPruner.java:51)
>
> org.apache.aurora.scheduler.async.HistoryPruner$3.run(HistoryPruner.java:164)
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
> java.util.concurrent.FutureTask.run(FutureTask.java:262)
>
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:178)
>
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:292)
>
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> java.lang.Thread.run(Thread.java:745)
> Name: Lifecycle-0
> State: BLOCKED
> Daemon: true
> ID: 2462
>
> org.apache.aurora.scheduler.storage.log.LogStorage.write(LogStorage.java:544)
>
> org.apache.aurora.scheduler.storage.CallOrderEnforcingStorage.write(CallOrderEnforcingStorage.java:130)
>
> org.apache.aurora.scheduler.updater.JobUpdateControllerImpl.systemResume(JobUpdateControllerImpl.java:195)
>
> org.apache.aurora.scheduler.updater.JobUpdateEventSubscriber.schedulerActive(JobUpdateEventSubscriber.java:83)
> sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
>
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> java.lang.reflect.Method.invoke(Method.java:606)
>
> com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
>
> com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
> com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
>
> com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
> com.google.common.eventbus.EventBus.post(EventBus.java:275)
>
> org.apache.aurora.scheduler.events.PubsubEventModule$2.post(PubsubEventModule.java:68)
>
> org.apache.aurora.scheduler.SchedulerLifecycle$7$2.run(SchedulerLifecycle.java:336)
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
> java.util.concurrent.FutureTask.run(FutureTask.java:262)
>
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:178)
>
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:292)
>
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> java.lang.Thread.run(Thread.java:745)
> {noformat}
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