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From Konstantin Gregor <konstantin.gre...@tngtech.com>
Subject ClassNotFoundException upon Savepoint Disposal
Date Mon, 27 Mar 2017 09:41:01 GMT
Hey everyone,

we are experiencing an issue in the disposal of savepoints in
Flink-1.1.3. We have a streaming job that has custom state (user objects
are part of the state). We create a savepoint:

$ flink savepoint <JOBID>
[...]
Savepoint completed. Path:
hdfs:/bigdata/flink/savepoints/savepoint-20f064fb9f50
[...]

Then we want to simply dispose of that savepoint where we also provide
the jar to the job from which the savepoint was made:
$ flink savepoint -d
hdfs:/bigdata/flink/savepoints/savepoint-20f064fb9f50 -j
/path/to/jar/application.jar

This gives us a ClassNotFoundException of our custom objects [1].

Adding our jar to the flink/lib directory is not an option for us,
things will break because of this.
Does anyone have an idea on how to proceed here?

Thanks and best regards,

Konstantin

[1]
java.io.IOException: Failed to dispose savepoint hdfs:///bigdata/flink/savepoints/savepoint-20f064fb9f50.
        at org.apache.flink.runtime.checkpoint.savepoint.FsSavepointStore.disposeSavepoint(FsSavepointStore.java:163)
        at org.apache.flink.runtime.jobmanager.JobManager$$anonfun$handleMessage$1$$anonfun$applyOrElse$7.apply$mcV$sp(JobManager.scala:745)
        at org.apache.flink.runtime.jobmanager.JobManager$$anonfun$handleMessage$1$$anonfun$applyOrElse$7.apply(JobManager.scala:727)
        at org.apache.flink.runtime.jobmanager.JobManager$$anonfun$handleMessage$1$$anonfun$applyOrElse$7.apply(JobManager.scala:727)
        at scala.concurrent.impl.Future$PromiseCompletingRunnable.liftedTree1$1(Future.scala:24)
        at scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:24)
        at akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:41)
        at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:401)
        at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
        at scala.concurrent.forkjoin.ForkJoinPool$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)
Caused by: java.lang.ClassNotFoundException: our.company.application.eventdata.EventDataRecord
        at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:270)
        at org.apache.flink.util.InstantiationUtil$ClassLoaderObjectInputStream.resolveClass(InstantiationUtil.java:65)
        at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1612)
        at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1517)
        at java.io.ObjectInputStream.readClass(ObjectInputStream.java:1483)
        at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1333)
        at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1990)
        at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:500)
        at org.apache.flink.api.java.typeutils.runtime.PojoSerializer.readObject(PojoSerializer.java:131)
        at sun.reflect.GeneratedMethodAccessor33.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1017)
        at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1893)
        at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798)
        at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350)
        at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1990)
        at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:500)
        at org.apache.flink.api.common.state.StateDescriptor.readObject(StateDescriptor.java:268)
        at sun.reflect.GeneratedMethodAccessor32.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1017)
        at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1893)
        at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798)
        at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350)
        at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1990)
        at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1915)
        at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798)
        at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350)
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370)
        at java.util.HashMap.readObject(HashMap.java:1184)
        at sun.reflect.GeneratedMethodAccessor6.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1017)
        at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1893)
        at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798)
        at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350)
        at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1990)
        at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1915)
        at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798)
        at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350)
        at java.io.ObjectInputStream.readArray(ObjectInputStream.java:1706)
        at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1344)
        at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1990)
        at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1915)
        at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798)
        at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350)
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370)
        at org.apache.flink.util.InstantiationUtil.deserializeObject(InstantiationUtil.java:291)
        at org.apache.flink.util.SerializedValue.deserializeValue(SerializedValue.java:58)
        at org.apache.flink.runtime.checkpoint.SubtaskState.discard(SubtaskState.java:85)
        at org.apache.flink.runtime.checkpoint.TaskState.discard(TaskState.java:147)
        at org.apache.flink.runtime.checkpoint.savepoint.SavepointV0.dispose(SavepointV0.java:66)
        at org.apache.flink.runtime.checkpoint.savepoint.FsSavepointStore.disposeSavepoint(FsSavepointStore.java:151)


-- 
Konstantin Gregor * konstantin.gregor@tngtech.com
TNG Technology Consulting GmbH, Betastr. 13a, 85774 Unterföhring
Geschäftsführer: Henrik Klagges, Christoph Stock, Dr. Robert Dahlke
Sitz: Unterföhring * Amtsgericht München * HRB 135082


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