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https://issues.apache.org/jira/browse/FLINK-14742?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17016929#comment-17016929
]
Kostas Kloudas commented on FLINK-14742:
----------------------------------------
Or this:
{code:java}
Caught exception while executing runnable in main thread.
java.lang.NullPointerException
at
org.apache.flink.runtime.taskexecutor.slot.TaskSlotTable.createSlotReport(TaskSlotTable.java:199)
at
org.apache.flink.runtime.taskexecutor.TaskExecutor.establishResourceManagerConnection(TaskExecutor.java:1030)
at
org.apache.flink.runtime.taskexecutor.TaskExecutor.access$1700(TaskExecutor.java:155)
at
org.apache.flink.runtime.taskexecutor.TaskExecutor$ResourceManagerRegistrationListener.lambda$onRegistrationSuccess$0(TaskExecutor.java:1725)
at
org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleRunAsync(AkkaRpcActor.java:397)
at
org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleRpcMessage(AkkaRpcActor.java:190)
at
org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleMessage(AkkaRpcActor.java:152)
at akka.japi.pf.UnitCaseStatement.apply(CaseStatements.scala:26)
at akka.japi.pf.UnitCaseStatement.apply(CaseStatements.scala:21)
at scala.PartialFunction$class.applyOrElse(PartialFunction.scala:123)
at akka.japi.pf.UnitCaseStatement.applyOrElse(CaseStatements.scala:21)
at scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:170)
at scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:171)
at scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:171)
at akka.actor.Actor$class.aroundReceive(Actor.scala:517)
at akka.actor.AbstractActor.aroundReceive(AbstractActor.scala:225)
at akka.actor.ActorCell.receiveMessage(ActorCell.scala:592)
at akka.actor.ActorCell.invoke(ActorCell.scala:561)
at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:258)
at akka.dispatch.Mailbox.run(Mailbox.scala:225)
at akka.dispatch.Mailbox.exec(Mailbox.scala:235)
at akka.dispatch.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
at
akka.dispatch.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
at akka.dispatch.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
at
akka.dispatch.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
{code}
which seems to be also related to concurrent modification of one of the slot
data structures in the {{TaskSlotTable}}.
> Unstable tests TaskExecutorTest#testSubmitTaskBeforeAcceptSlot
> --------------------------------------------------------------
>
> Key: FLINK-14742
> URL: https://issues.apache.org/jira/browse/FLINK-14742
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Coordination
> Affects Versions: 1.10.0
> Reporter: Zili Chen
> Assignee: Kostas Kloudas
> Priority: Critical
> Fix For: 1.10.0
>
>
> deadlock.
> {code}
> "main" #1 prio=5 os_prio=0 tid=0x00007f1f8800b800 nid=0x356 waiting on
> condition [0x00007f1f8e65c000]
> java.lang.Thread.State: WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for <0x0000000086e9e9c0> (a
> java.util.concurrent.CompletableFuture$Signaller)
> at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
> at
> java.util.concurrent.CompletableFuture$Signaller.block(CompletableFuture.java:1693)
> at
> java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3323)
> at
> java.util.concurrent.CompletableFuture.waitingGet(CompletableFuture.java:1729)
> at
> java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1895)
> at
> org.apache.flink.runtime.taskexecutor.TaskExecutorTest.testSubmitTaskBeforeAcceptSlot(TaskExecutorTest.java:1108)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> {code}
> full log https://api.travis-ci.org/v3/job/611275566/log.txt
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