David Morávek created FLINK-22646:
-------------------------------------
Summary: Accessing DeclarativeSlotManager metrics during
unregister throws NPE
Key: FLINK-22646
URL: https://issues.apache.org/jira/browse/FLINK-22646
Project: Flink
Issue Type: Bug
Components: Runtime / Metrics
Affects Versions: 1.13.0
Reporter: David Morávek
NPE is thrown when accessing DeclarativeSlotManager metrics during their
un-register.
{code:java}
May 08, 2021 4:57:46 AM org.apache.flink.runtime.metrics.MetricRegistryImpl
unregister
WARNING: Error while unregistering metric: taskSlotsAvailable.
java.lang.NullPointerException
at
org.apache.flink.runtime.resourcemanager.slotmanager.DeclarativeSlotManager.getNumberFreeSlots(DeclarativeSlotManager.java:715)
at
org.apache.flink.runtime.resourcemanager.slotmanager.DeclarativeSlotManager.lambda$registerSlotManagerMetrics$2(DeclarativeSlotManager.java:200)
at
org.apache.beam.runners.flink.metrics.Metrics.toString(Metrics.java:33)
at
org.apache.beam.runners.flink.metrics.FileReporter.notifyOfRemovedMetric(FileReporter.java:72)
at
org.apache.flink.runtime.metrics.MetricRegistryImpl.unregister(MetricRegistryImpl.java:435)
at
org.apache.flink.runtime.metrics.groups.AbstractMetricGroup.close(AbstractMetricGroup.java:333)
at
org.apache.flink.runtime.resourcemanager.slotmanager.DeclarativeSlotManager.close(DeclarativeSlotManager.java:241)
at
org.apache.flink.runtime.resourcemanager.ResourceManager.stopResourceManagerServices(ResourceManager.java:298)
at
org.apache.flink.runtime.resourcemanager.ResourceManager.onStop(ResourceManager.java:275)
at
org.apache.flink.runtime.rpc.RpcEndpoint.internalCallOnStop(RpcEndpoint.java:214)
at
org.apache.flink.runtime.rpc.akka.AkkaRpcActor$StartedState.terminate(AkkaRpcActor.java:563)
at
org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleControlMessage(AkkaRpcActor.java:186)
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$OrElse.applyOrElse(PartialFunction.scala:171)
at akka.actor.Actor$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}
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