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From "Robert Metzger (JIRA)" <j...@apache.org>
Subject [jira] [Created] (FLINK-5464) MetricQueryService throws NullPointerException on JobManager
Date Wed, 11 Jan 2017 20:34:16 GMT
Robert Metzger created FLINK-5464:
-------------------------------------

             Summary: MetricQueryService throws NullPointerException on JobManager
                 Key: FLINK-5464
                 URL: https://issues.apache.org/jira/browse/FLINK-5464
             Project: Flink
          Issue Type: Bug
          Components: Webfrontend
    Affects Versions: 1.2.0
            Reporter: Robert Metzger


I'm using Flink 699f4b0.

My JobManager log contains many of these log entries:

{code}
2017-01-11 19:42:05,778 WARN  org.apache.flink.runtime.webmonitor.metrics.MetricFetcher  
  - Fetching metrics failed.
akka.pattern.AskTimeoutException: Ask timed out on [Actor[akka://flink/user/MetricQueryService#-970662317]]
after [10000 ms]
	at akka.pattern.PromiseActorRef$$anonfun$1.apply$mcV$sp(AskSupport.scala:334)
	at akka.actor.Scheduler$$anon$7.run(Scheduler.scala:117)
	at scala.concurrent.Future$InternalCallbackExecutor$.scala$concurrent$Future$InternalCallbackExecutor$$unbatchedExecute(Future.scala:694)
	at scala.concurrent.Future$InternalCallbackExecutor$.execute(Future.scala:691)
	at akka.actor.LightArrayRevolverScheduler$TaskHolder.executeTask(Scheduler.scala:474)
	at akka.actor.LightArrayRevolverScheduler$$anon$8.executeBucket$1(Scheduler.scala:425)
	at akka.actor.LightArrayRevolverScheduler$$anon$8.nextTick(Scheduler.scala:429)
	at akka.actor.LightArrayRevolverScheduler$$anon$8.run(Scheduler.scala:381)
	at java.lang.Thread.run(Thread.java:745)
2017-01-11 19:42:07,765 WARN  org.apache.flink.runtime.metrics.dump.MetricQueryService   
  - An exception occurred while processing a message.
java.lang.NullPointerException
	at org.apache.flink.runtime.metrics.dump.MetricDumpSerialization.serializeGauge(MetricDumpSerialization.java:162)
	at org.apache.flink.runtime.metrics.dump.MetricDumpSerialization.access$300(MetricDumpSerialization.java:47)
	at org.apache.flink.runtime.metrics.dump.MetricDumpSerialization$MetricDumpSerializer.serialize(MetricDumpSerialization.java:90)
	at org.apache.flink.runtime.metrics.dump.MetricQueryService.onReceive(MetricQueryService.java:109)
	at akka.actor.UntypedActor$$anonfun$receive$1.applyOrElse(UntypedActor.scala:167)
	at akka.actor.Actor$class.aroundReceive(Actor.scala:467)
	at akka.actor.UntypedActor.aroundReceive(UntypedActor.scala:97)
	at akka.actor.ActorCell.receiveMessage(ActorCell.scala:516)
	at akka.actor.ActorCell.invoke(ActorCell.scala:487)
	at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:238)
	at akka.dispatch.Mailbox.run(Mailbox.scala:220)
	at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:397)
	at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
	at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
	at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
	at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
{code}



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