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  1. Flink
  2. FLINK-4157

FlinkKafkaMetrics cause TaskManager shutdown during cancellation

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    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Critical
    • Resolution: Fixed
    • Affects Version/s: 1.0.3
    • Fix Version/s: 1.1.0
    • Component/s: Connectors / Kafka
    • Labels:
      None

      Description

      The following issue was reported by a user:

      2016-07-05 01:32:25,113 INFO  org.apache.flink.runtime.taskmanager.Task                     - Freeing task resources for Sink: KafkaOutput (59/72)
      2016-07-05 01:32:25,113 INFO  org.apache.flink.runtime.taskmanager.Task                     - Sink: KafkaOutput (53/72) switched to CANCELED
      2016-07-05 01:32:25,113 INFO  org.apache.flink.runtime.taskmanager.Task                     - Freeing task resources for Sink: KafkaOutput (53/72)
      2016-07-05 01:32:25,144 ERROR akka.actor.OneForOneStrategy                                  - 
      java.util.ConcurrentModificationException
      	at java.util.HashMap$HashIterator.nextNode(HashMap.java:1429)
      	at java.util.HashMap$ValueIterator.next(HashMap.java:1458)
      	at org.apache.kafka.clients.InFlightRequests.inFlightRequestCount(InFlightRequests.java:106)
      	at org.apache.kafka.clients.NetworkClient.inFlightRequestCount(NetworkClient.java:211)
      	at org.apache.kafka.clients.producer.internals.Sender$SenderMetrics$1.measure(Sender.java:383)
      	at org.apache.kafka.common.metrics.KafkaMetric.value(KafkaMetric.java:57)
      	at org.apache.kafka.common.metrics.KafkaMetric.value(KafkaMetric.java:52)
      	at org.apache.flink.streaming.connectors.kafka.internals.metrics.DefaultKafkaMetricAccumulator.writeObject(DefaultKafkaMetricAccumulator.java:152)
      	at sun.reflect.GeneratedMethodAccessor20859.invoke(Unknown Source)
      	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      	at java.lang.reflect.Method.invoke(Method.java:497)
      	at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:988)
      	at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1496)
      	at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
      	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
      	at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:348)
      	at java.util.HashMap.internalWriteEntries(HashMap.java:1777)
      	at java.util.HashMap.writeObject(HashMap.java:1354)
      	at sun.reflect.GeneratedMethodAccessor42.invoke(Unknown Source)
      	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      	at java.lang.reflect.Method.invoke(Method.java:497)
      	at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:988)
      	at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1496)
      	at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
      	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
      	at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1548)
      	at java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:441)
      	at java.util.Collections$SynchronizedMap.writeObject(Collections.java:2691)
      	at sun.reflect.GeneratedMethodAccessor226.invoke(Unknown Source)
      	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      	at java.lang.reflect.Method.invoke(Method.java:497)
      	at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:988)
      	at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1496)
      	at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
      	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
      	at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:348)
      	at org.apache.flink.util.InstantiationUtil.serializeObject(InstantiationUtil.java:300)
      	at org.apache.flink.util.SerializedValue.<init>(SerializedValue.java:48)
      	at org.apache.flink.runtime.accumulators.AccumulatorSnapshot.<init>(AccumulatorSnapshot.java:58)
      	at org.apache.flink.runtime.accumulators.AccumulatorRegistry.getSnapshot(AccumulatorRegistry.java:78)
      	at org.apache.flink.runtime.taskmanager.TaskManager.unregisterTaskAndNotifyFinalState(TaskManager.scala:1150)
      	at org.apache.flink.runtime.taskmanager.TaskManager.org$apache$flink$runtime$taskmanager$TaskManager$$handleTaskMessage(TaskManager.scala:407)
      	at org.apache.flink.runtime.taskmanager.TaskManager$$anonfun$handleMessage$1.applyOrElse(TaskManager.scala:265)
      	at scala.runtime.AbstractPartialFunction$mcVL$sp.apply$mcVL$sp(AbstractPartialFunction.scala:33)
      	at scala.runtime.AbstractPartialFunction$mcVL$sp.apply(AbstractPartialFunction.scala:33)
      	at scala.runtime.AbstractPartialFunction$mcVL$sp.apply(AbstractPartialFunction.scala:25)
      	at org.apache.flink.runtime.LeaderSessionMessageFilter$$anonfun$receive$1.applyOrElse(LeaderSessionMessageFilter.scala:44)
      	at scala.runtime.AbstractPartialFunction$mcVL$sp.apply$mcVL$sp(AbstractPartialFunction.scala:33)
      	at scala.runtime.AbstractPartialFunction$mcVL$sp.apply(AbstractPartialFunction.scala:33)
      	at scala.runtime.AbstractPartialFunction$mcVL$sp.apply(AbstractPartialFunction.scala:25)
      	at org.apache.flink.runtime.LogMessages$$anon$1.apply(LogMessages.scala:33)
      	at org.apache.flink.runtime.LogMessages$$anon$1.apply(LogMessages.scala:28)
      	at scala.PartialFunction$class.applyOrElse(PartialFunction.scala:118)
      	at org.apache.flink.runtime.LogMessages$$anon$1.applyOrElse(LogMessages.scala:28)
      	at akka.actor.Actor$class.aroundReceive(Actor.scala:465)
      	at org.apache.flink.runtime.taskmanager.TaskManager.aroundReceive(TaskManager.scala:119)
      	at akka.actor.ActorCell.receiveMessage(ActorCell.scala:516)
      	at akka.actor.ActorCell.invoke(ActorCell.scala:487)
      	at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:254)
      	at akka.dispatch.Mailbox.run(Mailbox.scala:221)
      	at akka.dispatch.Mailbox.exec(Mailbox.scala:231)
      	at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
      	at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.pollAndExecAll(ForkJoinPool.java:1253)
      	at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1346)
      	at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
      	at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
      

      An immediate workaround is to disable the Kafka metrics by setting "flink.disable-metrics" to "true".
      I'll make the metrics serialization more robust by catching and logging the exceptions. Metrics should never cause system failures, or even worse shutdowns.

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              • Assignee:
                rmetzger Robert Metzger
                Reporter:
                rmetzger Robert Metzger
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                Dates

                • Created:
                  Updated:
                  Resolved: