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https://issues.apache.org/jira/browse/FLINK-10419?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16632167#comment-16632167
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Nico Kruber commented on FLINK-10419:
-------------------------------------
Hi [~Xeli],
I don't think, your Exception is related - the one in the OP is on the
JobManager during deserialization of an RPC message. Yours is throws on a
TaskManager(?). Without knowing the details there, could it be that you are
instantiating something like a singleton whose lifecycle is beyond the job's
lifecycle? In that case, it you try to load a new class, the original
classloader may not be available anymore.
-> but that's off-topic here and may be discussed on the mailing list or
separate JIRA.
> ClassNotFoundException while deserializing user exceptions from checkpointing
> -----------------------------------------------------------------------------
>
> Key: FLINK-10419
> URL: https://issues.apache.org/jira/browse/FLINK-10419
> Project: Flink
> Issue Type: Bug
> Components: Distributed Coordination, State Backends, Checkpointing
> Affects Versions: 1.5.0, 1.5.1, 1.5.2, 1.5.3, 1.6.0, 1.6.1, 1.7.0, 1.5.4
> Reporter: Nico Kruber
> Assignee: Nico Kruber
> Priority: Major
>
> It seems that somewhere in the operator's failure handling, we hand a
> user-code exception to the checkpoint coordinator via Java serialization but
> it will then fail during the de-serialization because the class is not
> available. This will result in the following error shadowing the real one:
> {code}
> java.lang.ClassNotFoundException:
> org.apache.flink.streaming.connectors.kafka.FlinkKafka011Exception
> at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
> at sun.misc.Launcher.loadClass(Launcher.java:338)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
> at java.lang.Class.forName0(Native Method)
> at java.lang.Class.forName(Class.java:348)
> at
> org.apache.flink.util.InstantiationUtil.resolveClass(InstantiationUtil.java:76)
> at
> java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1859)
> at
> java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1745)
> at
> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2033)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1567)
> at
> java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2278)
> at
> java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:557)
> at java.lang.Throwable.readObject(Throwable.java:914)
> at sun.reflect.GeneratedMethodAccessor158.invoke(Unknown Source)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at
> java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1158)
> at
> java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2169)
> at
> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2060)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1567)
> at java.io.ObjectInputStream.readObject(ObjectInputStream.java:427)
> at
> org.apache.flink.runtime.rpc.messages.RemoteRpcInvocation.readObject(RemoteRpcInvocation.java:222)
> at sun.reflect.GeneratedMethodAccessor7.invoke(Unknown Source)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at
> java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1158)
> at
> java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2169)
> at
> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2060)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1567)
> at java.io.ObjectInputStream.readObject(ObjectInputStream.java:427)
> at
> org.apache.flink.util.InstantiationUtil.deserializeObject(InstantiationUtil.java:502)
> at
> org.apache.flink.util.InstantiationUtil.deserializeObject(InstantiationUtil.java:489)
> at
> org.apache.flink.util.InstantiationUtil.deserializeObject(InstantiationUtil.java:477)
> at
> org.apache.flink.util.SerializedValue.deserializeValue(SerializedValue.java:58)
> at
> org.apache.flink.runtime.rpc.messages.RemoteRpcInvocation.deserializeMethodInvocation(RemoteRpcInvocation.java:118)
> at
> org.apache.flink.runtime.rpc.messages.RemoteRpcInvocation.getMethodName(RemoteRpcInvocation.java:59)
> at
> org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleRpcInvocation(AkkaRpcActor.java:214)
> at
> org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleRpcMessage(AkkaRpcActor.java:162)
> at
> org.apache.flink.runtime.rpc.akka.FencedAkkaRpcActor.handleRpcMessage(FencedAkkaRpcActor.java:70)
> at
> org.apache.flink.runtime.rpc.akka.AkkaRpcActor.onReceive(AkkaRpcActor.java:142)
> at
> org.apache.flink.runtime.rpc.akka.FencedAkkaRpcActor.onReceive(FencedAkkaRpcActor.java:40)
> at
> akka.actor.UntypedActor3728anonfun.applyOrElse(UntypedActor.scala:165)
> at akka.actor.Actor.aroundReceive(Actor.scala:502)
> at akka.actor.UntypedActor.aroundReceive(UntypedActor.scala:95)
> at akka.actor.ActorCell.receiveMessage(ActorCell.scala:526)
> at akka.actor.ActorCell.invoke(ActorCell.scala:495)
> at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:257)
> at akka.dispatch.Mailbox.run(Mailbox.scala:224)
> at akka.dispatch.Mailbox.exec(Mailbox.scala:234)
> at
> scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
> at
> scala.concurrent.forkjoin.ForkJoinPool.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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