Narayanan Arunachalam created FLINK-9258:
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Summary: ConcurrentModificationException in
ComponentMetricGroup.getAllVariables
Key: FLINK-9258
URL: https://issues.apache.org/jira/browse/FLINK-9258
Project: Flink
Issue Type: Bug
Components: Metrics
Affects Versions: 1.4.2
Reporter: Narayanan Arunachalam
Seeing this exception at the job startup time. Looks like there is a race
condition when the metrics variables are constructed.
The error is intermittent.
Exception in thread "main"
org.apache.flink.runtime.client.JobExecutionException: Job execution failed.
at
org.apache.flink.runtime.jobmanager.JobManager$$anonfun$handleMessage$1$$anonfun$applyOrElse$6.apply$mcV$sp(JobManager.scala:897)
at
org.apache.flink.runtime.jobmanager.JobManager$$anonfun$handleMessage$1$$anonfun$applyOrElse$6.apply(JobManager.scala:840)
at
org.apache.flink.runtime.jobmanager.JobManager$$anonfun$handleMessage$1$$anonfun$applyOrElse$6.apply(JobManager.scala:840)
at
scala.concurrent.impl.Future$PromiseCompletingRunnable.liftedTree1$1(Future.scala:24)
at
scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:24)
at akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:39)
at
akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:415)
at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
at
scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
at
scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
at
scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
Caused by: java.util.ConcurrentModificationException
at java.util.HashMap$HashIterator.nextNode(HashMap.java:1437)
at java.util.HashMap$EntryIterator.next(HashMap.java:1471)
at java.util.HashMap$EntryIterator.next(HashMap.java:1469)
at java.util.HashMap.putMapEntries(HashMap.java:511)
at java.util.HashMap.putAll(HashMap.java:784)
at
org.apache.flink.runtime.metrics.groups.ComponentMetricGroup.getAllVariables(ComponentMetricGroup.java:63)
at
org.apache.flink.runtime.metrics.groups.ComponentMetricGroup.getAllVariables(ComponentMetricGroup.java:63)
at
com.netflix.spaas.metrics.MetricsReporterRegistry.getTags(MetricsReporterRegistry.java:147)
at
com.netflix.spaas.metrics.MetricsReporterRegistry.mergeWithSourceAndSinkTags(MetricsReporterRegistry.java:170)
at
com.netflix.spaas.metrics.MetricsReporterRegistry.addReporter(MetricsReporterRegistry.java:75)
at
com.netflix.spaas.nfflink.connector.kafka.source.Kafka010Consumer.createFetcher(Kafka010Consumer.java:69)
at
org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumerBase.run(FlinkKafkaConsumerBase.java:549)
at
org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:86)
at
org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:55)
at
org.apache.flink.streaming.runtime.tasks.SourceStreamTask.run(SourceStreamTask.java:94)
at
org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:264)
at org.apache.flink.runtime.taskmanager.Task.run(Task.java:718)
at java.lang.Thread.run(Thread.java:748)
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