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[jira] [Created] (FLINK-10483) Can't restore from a savepoint even with Allow Non Restored State enabled


Elias Levy created FLINK-10483:
----------------------------------

             Summary: Can't restore from a savepoint even with Allow Non Restored State enabled
                 Key: FLINK-10483
                 URL: https://issues.apache.org/jira/browse/FLINK-10483
             Project: Flink
          Issue Type: Bug
          Components: State Backends, Checkpointing, Type Serialization System
    Affects Versions: 1.4.2
            Reporter: Elias Levy


A trimmed streaming job fails a restore from a savepoint with an Unloadable class for type serializer error, even though the case class in question has been eliminated from the job and Allow Non Restored State is enabled.

We have a job running on a Flink 1.4.2 cluster with two Kafka input streams, one of the streams is processed by an async function, and the output of the async function and the other original stream are consumed by a CoProcessOperator, that intern emits Scala case class instances, that go into a stateful ProcessFunction filter, and then into a sink.  I.e.

{code:java}
source 1 -> async function --\
                                               |---> co process --> process --> sink
source 2 --------------------------/
{code}

I eliminated most of the DAG, leaving only the source 1 --> async function portion of it.  This removed the case class in question from the processing graph.  When I try to restore from the savepoint, even if Allow Non Restored State is selected, the job fails to restore with the error "Deserialization of serializer erroed".

This is the error being generated:


{noformat}
WARN  org.apache.flink.api.common.typeutils.TypeSerializerSerializationUtil  - Deserialization of serializer errored; replacing with null.
java.io.IOException: Unloadable class for type serializer.
	at org.apache.flink.api.common.typeutils.TypeSerializerSerializationUtil$TypeSerializerSerializationProxy.read(TypeSerializerSerializationUtil.java:384)
	at org.apache.flink.api.common.typeutils.TypeSerializerSerializationUtil.tryReadSerializer(TypeSerializerSerializationUtil.java:110)
	at org.apache.flink.api.common.typeutils.TypeSerializerSerializationUtil.tryReadSerializer(TypeSerializerSerializationUtil.java:83)
	at org.apache.flink.api.common.typeutils.TypeSerializerSerializationUtil.readSerializersAndConfigsWithResilience(TypeSerializerSerializationUtil.java:203)
	at org.apache.flink.runtime.state.OperatorBackendStateMetaInfoSnapshotReaderWriters$OperatorBackendStateMetaInfoReaderV2.readStateMetaInfo(OperatorBackendStateMetaInfoSnapshotReaderWriters.java:207)
	at org.apache.flink.runtime.state.OperatorBackendSerializationProxy.read(OperatorBackendSerializationProxy.java:85)
	at org.apache.flink.runtime.state.DefaultOperatorStateBackend.restore(DefaultOperatorStateBackend.java:351)
	at org.apache.flink.streaming.runtime.tasks.StreamTask.createOperatorStateBackend(StreamTask.java:733)
	at org.apache.flink.streaming.api.operators.AbstractStreamOperator.initOperatorState(AbstractStreamOperator.java:299)
	at org.apache.flink.streaming.api.operators.AbstractStreamOperator.initializeState(AbstractStreamOperator.java:248)
	at org.apache.flink.streaming.runtime.tasks.StreamTask.initializeOperators(StreamTask.java:692)
	at org.apache.flink.streaming.runtime.tasks.StreamTask.initializeState(StreamTask.java:679)
	at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:253)
	at org.apache.flink.runtime.taskmanager.Task.run(Task.java:718)
	at java.lang.Thread.run(Unknown Source)
Caused by: java.io.InvalidClassException: failed to read class descriptor
	at java.io.ObjectInputStream.readNonProxyDesc(Unknown Source)
	at java.io.ObjectInputStream.readClassDesc(Unknown Source)
	at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
	at java.io.ObjectInputStream.readObject0(Unknown Source)
	at java.io.ObjectInputStream.defaultReadFields(Unknown Source)
	at java.io.ObjectInputStream.readSerialData(Unknown Source)
	at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
	at java.io.ObjectInputStream.readObject0(Unknown Source)
	at java.io.ObjectInputStream.readObject(Unknown Source)
	at org.apache.flink.api.common.typeutils.TypeSerializerSerializationUtil$TypeSerializerSerializationProxy.read(TypeSerializerSerializationUtil.java:375)
	... 14 more
Caused by: java.lang.ClassNotFoundException: com.somewhere.TestJob$$anon$13$$anon$3
	at java.net.URLClassLoader.findClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at org.apache.flink.runtime.execution.librarycache.FlinkUserCodeClassLoaders$ChildFirstClassLoader.loadClass(FlinkUserCodeClassLoaders.java:128)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Unknown Source)
	at org.apache.flink.util.InstantiationUtil$ClassLoaderObjectInputStream.resolveClass(InstantiationUtil.java:73)
	at org.apache.flink.util.InstantiationUtil$FailureTolerantObjectInputStream.readClassDescriptor(InstantiationUtil.java:204)
	... 24 more
WARN  org.apache.flink.api.common.typeutils.TypeSerializerSerializationUtil  - Deserialization of serializer errored; replacing with null.
java.io.IOException: Unloadable class for type serializer.
	at org.apache.flink.api.common.typeutils.TypeSerializerSerializationUtil$TypeSerializerSerializationProxy.read(TypeSerializerSerializationUtil.java:384)
	at org.apache.flink.api.common.typeutils.TypeSerializerSerializationUtil.tryReadSerializer(TypeSerializerSerializationUtil.java:110)
	at org.apache.flink.api.common.typeutils.TypeSerializerSerializationUtil.tryReadSerializer(TypeSerializerSerializationUtil.java:83)
	at org.apache.flink.api.common.typeutils.TypeSerializerSerializationUtil.readSerializersAndConfigsWithResilience(TypeSerializerSerializationUtil.java:203)
	at org.apache.flink.api.common.typeutils.CompositeTypeSerializerConfigSnapshot.read(CompositeTypeSerializerConfigSnapshot.java:71)
	at org.apache.flink.api.common.typeutils.TypeSerializerSerializationUtil$TypeSerializerConfigSnapshotSerializationProxy.read(TypeSerializerSerializationUtil.java:445)
	at org.apache.flink.api.common.typeutils.TypeSerializerSerializationUtil.readSerializerConfigSnapshot(TypeSerializerSerializationUtil.java:250)
	at org.apache.flink.api.common.typeutils.TypeSerializerSerializationUtil.readSerializersAndConfigsWithResilience(TypeSerializerSerializationUtil.java:206)
	at org.apache.flink.runtime.state.OperatorBackendStateMetaInfoSnapshotReaderWriters$OperatorBackendStateMetaInfoReaderV2.readStateMetaInfo(OperatorBackendStateMetaInfoSnapshotReaderWriters.java:207)
	at org.apache.flink.runtime.state.OperatorBackendSerializationProxy.read(OperatorBackendSerializationProxy.java:85)
	at org.apache.flink.runtime.state.DefaultOperatorStateBackend.restore(DefaultOperatorStateBackend.java:351)
	at org.apache.flink.streaming.runtime.tasks.StreamTask.createOperatorStateBackend(StreamTask.java:733)
	at org.apache.flink.streaming.api.operators.AbstractStreamOperator.initOperatorState(AbstractStreamOperator.java:299)
	at org.apache.flink.streaming.api.operators.AbstractStreamOperator.initializeState(AbstractStreamOperator.java:248)
	at org.apache.flink.streaming.runtime.tasks.StreamTask.initializeOperators(StreamTask.java:692)
	at org.apache.flink.streaming.runtime.tasks.StreamTask.initializeState(StreamTask.java:679)
	at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:253)
	at org.apache.flink.runtime.taskmanager.Task.run(Task.java:718)
	at java.lang.Thread.run(Unknown Source)
Caused by: java.io.InvalidClassException: failed to read class descriptor
	at java.io.ObjectInputStream.readNonProxyDesc(Unknown Source)
	at java.io.ObjectInputStream.readClassDesc(Unknown Source)
	at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
	at java.io.ObjectInputStream.readObject0(Unknown Source)
	at java.io.ObjectInputStream.readObject(Unknown Source)
	at org.apache.flink.api.common.typeutils.TypeSerializerSerializationUtil$TypeSerializerSerializationProxy.read(TypeSerializerSerializationUtil.java:375)
	... 18 more
Caused by: java.lang.ClassNotFoundException: com.somewhere.TestJob$$anon$13$$anon$3
	at java.net.URLClassLoader.findClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at org.apache.flink.runtime.execution.librarycache.FlinkUserCodeClassLoaders$ChildFirstClassLoader.loadClass(FlinkUserCodeClassLoaders.java:128)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Unknown Source)
	at org.apache.flink.util.InstantiationUtil$ClassLoaderObjectInputStream.resolveClass(InstantiationUtil.java:73)
	at org.apache.flink.util.InstantiationUtil$FailureTolerantObjectInputStream.readClassDescriptor(InstantiationUtil.java:204)
	... 24 more
ERROR org.apache.flink.streaming.runtime.tasks.StreamTask           - Error during disposal of stream operator.
java.lang.NullPointerException
	at org.apache.flink.streaming.api.operators.async.AsyncWaitOperator.stopResources(AsyncWaitOperator.java:353)
	at org.apache.flink.streaming.api.operators.async.AsyncWaitOperator.dispose(AsyncWaitOperator.java:330)
	at org.apache.flink.streaming.runtime.tasks.StreamTask.disposeAllOperators(StreamTask.java:446)
	at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:351)
	at org.apache.flink.runtime.taskmanager.Task.run(Task.java:718)
	at java.lang.Thread.run(Unknown Source)
INFO  org.apache.flink.runtime.taskmanager.Task                     - Source: Kafka Topic -> Async Function (1/1) (1de078fb77acdd16b7e021fb3e70339f) switched from RUNNING to FAILED.
java.lang.IllegalStateException: Could not initialize operator state backend.
	at org.apache.flink.streaming.api.operators.AbstractStreamOperator.initOperatorState(AbstractStreamOperator.java:301)
	at org.apache.flink.streaming.api.operators.AbstractStreamOperator.initializeState(AbstractStreamOperator.java:248)
	at org.apache.flink.streaming.runtime.tasks.StreamTask.initializeOperators(StreamTask.java:692)
	at org.apache.flink.streaming.runtime.tasks.StreamTask.initializeState(StreamTask.java:679)
	at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:253)
	at org.apache.flink.runtime.taskmanager.Task.run(Task.java:718)
	at java.lang.Thread.run(Unknown Source)
Caused by: java.io.IOException: Unable to restore operator state [_async_wait_operator_state_]. The previous serializer of the operator state must be present; the serializer could have been removed from the classpath, or its implementation have changed and could not be loaded. This is a temporary restriction that will be fixed in future versions.
	at org.apache.flink.runtime.state.DefaultOperatorStateBackend.restore(DefaultOperatorStateBackend.java:367)
	at org.apache.flink.streaming.runtime.tasks.StreamTask.createOperatorStateBackend(StreamTask.java:733)
	at org.apache.flink.streaming.api.operators.AbstractStreamOperator.initOperatorState(AbstractStreamOperator.java:299)
	... 6 more
{noformat}




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