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From rmetzger <...@git.apache.org>
Subject [GitHub] flink issue #3103: [FLINK-5464] [metrics] Prevent some NPEs
Date Fri, 13 Jan 2017 15:47:39 GMT
Github user rmetzger commented on the issue:

    https://github.com/apache/flink/pull/3103
  
    While testing this PR, I found that the jobmanager.log is now full with exceptions like
this one:
    
    ```
    java.io.EOFException
            at java.io.DataInputStream.readInt(DataInputStream.java:392)
            at org.apache.flink.runtime.metrics.dump.MetricDumpSerialization.deserializeString(MetricDumpSerialization.java:230)
            at org.apache.flink.runtime.metrics.dump.MetricDumpSerialization.deserializeMetricInfo(MetricDumpSerialization.java:278)
            at org.apache.flink.runtime.metrics.dump.MetricDumpSerialization.deserializeGauge(MetricDumpSerialization.java:243)
            at org.apache.flink.runtime.metrics.dump.MetricDumpSerialization.access$800(MetricDumpSerialization.java:47)
            at org.apache.flink.runtime.metrics.dump.MetricDumpSerialization$MetricDumpDeserializer.deserialize(MetricDumpSerialization.java:214)
            at org.apache.flink.runtime.webmonitor.metrics.MetricFetcher.addMetrics(MetricFetcher.java:196)
            at org.apache.flink.runtime.webmonitor.metrics.MetricFetcher.access$500(MetricFetcher.java:58)
            at org.apache.flink.runtime.webmonitor.metrics.MetricFetcher$4.onSuccess(MetricFetcher.java:188)
            at akka.dispatch.OnSuccess.internal(Future.scala:212)
            at akka.dispatch.japi$CallbackBridge.apply(Future.scala:175)
            at akka.dispatch.japi$CallbackBridge.apply(Future.scala:172)
            at scala.PartialFunction$class.applyOrElse(PartialFunction.scala:118)
            at scala.runtime.AbstractPartialFunction.applyOrElse(AbstractPartialFunction.scala:25)
            at scala.concurrent.Future$$anonfun$onSuccess$1.apply(Future.scala:117)
            at scala.concurrent.Future$$anonfun$onSuccess$1.apply(Future.scala:115)
            at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:32)
            at java.util.concurrent.ForkJoinTask$AdaptedRunnable.exec(ForkJoinTask.java:1265)
            at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:334)
            at java.util.concurrent.ForkJoinWorkerThread.execTask(ForkJoinWorkerThread.java:604)
            at java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:784)
            at java.util.concurrent.ForkJoinPool.work(ForkJoinPool.java:646)
            at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:398)
    ```



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