Restore state class not found exception in 1.8

Posted by Lasse Nedergaard on
URL: http://deprecated-apache-flink-user-mailing-list-archive.369.s1.nabble.com/Restore-state-class-not-found-exception-in-1-8-tp28027.html

Hi.

When we restart some of our jobs from a savepoint we see the the exception below. It only happens for some of our jobs and we didn't see it in 1.7.2. The class Flink can't find differ from job to job and we are sure it's included in our Fat jar.

As a side note we are on our way to use Avro instead of POJO, but are not there yet.

If anyone have a clue what the root cause could be, and how to resolve it would be appreciated.

Thanks in advance

Lasse Nedergaard

java.lang.Exception: Exception while creating StreamOperatorStateContext.
	at org.apache.flink.streaming.api.operators.StreamTaskStateInitializerImpl.streamOperatorStateContext(StreamTaskStateInitializerImpl.java:195)
	at org.apache.flink.streaming.api.operators.AbstractStreamOperator.initializeState(AbstractStreamOperator.java:250)
	at org.apache.flink.streaming.runtime.tasks.StreamTask.initializeState(StreamTask.java:738)
	at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:289)
	at org.apache.flink.runtime.taskmanager.Task.run(Task.java:711)
	at java.lang.Thread.run(Thread.java:748)
Caused by: org.apache.flink.util.FlinkException: Could not restore operator state backend for StreamSink_609b5f7fc746f29234b038c121356a9b_(2/2) from any of the 1 provided restore options.
	at org.apache.flink.streaming.api.operators.BackendRestorerProcedure.createAndRestore(BackendRestorerProcedure.java:135)
	at org.apache.flink.streaming.api.operators.StreamTaskStateInitializerImpl.operatorStateBackend(StreamTaskStateInitializerImpl.java:255)
	at org.apache.flink.streaming.api.operators.StreamTaskStateInitializerImpl.streamOperatorStateContext(StreamTaskStateInitializerImpl.java:143)
	... 5 more
Caused by: org.apache.flink.runtime.state.BackendBuildingException: Failed when trying to restore operator state backend
	at org.apache.flink.runtime.state.DefaultOperatorStateBackendBuilder.build(DefaultOperatorStateBackendBuilder.java:86)
	at org.apache.flink.contrib.streaming.state.RocksDBStateBackend.createOperatorStateBackend(RocksDBStateBackend.java:537)
	at org.apache.flink.streaming.api.operators.StreamTaskStateInitializerImpl.lambda$operatorStateBackend$0(StreamTaskStateInitializerImpl.java:246)
	at org.apache.flink.streaming.api.operators.BackendRestorerProcedure.attemptCreateAndRestore(BackendRestorerProcedure.java:142)
	at org.apache.flink.streaming.api.operators.BackendRestorerProcedure.createAndRestore(BackendRestorerProcedure.java:121)
	... 7 more
Caused by: java.lang.RuntimeException: Cannot instantiate class.
	at org.apache.flink.api.java.typeutils.runtime.PojoSerializer.deserialize(PojoSerializer.java:384)
	at org.apache.flink.runtime.state.OperatorStateRestoreOperation.deserializeOperatorStateValues(OperatorStateRestoreOperation.java:191)
	at org.apache.flink.runtime.state.OperatorStateRestoreOperation.restore(OperatorStateRestoreOperation.java:165)
	at org.apache.flink.runtime.state.DefaultOperatorStateBackendBuilder.build(DefaultOperatorStateBackendBuilder.java:83)
	... 11 more
Caused by: java.lang.ClassNotFoundException: org/trackunit/tm2/formats/ReportMessage
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:348)
	at org.apache.flink.api.java.typeutils.runtime.PojoSerializer.deserialize(PojoSerializer.java:382)
	... 14 more