Robert Metzger created FLINK-2543:
-------------------------------------
Summary: State handling does not support deserializing classes
through the UserCodeClassloader
Key: FLINK-2543
URL: https://issues.apache.org/jira/browse/FLINK-2543
Project: Flink
Issue Type: Bug
Components: Streaming
Affects Versions: 0.9, 0.10
Reporter: Robert Metzger
Priority: Blocker
The current implementation of the state checkpointing does not support custom
classes, because the UserCodeClassLoader is not used to deserialize the state.
{code}
Error: java.lang.RuntimeException: Failed to deserialize state handle and setup
initial operator state.
at org.apache.flink.runtime.taskmanager.Task.run(Task.java:544)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.ClassNotFoundException:
com.ottogroup.bi.searchlab.searchsessionizer.OperatorState
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:348)
at java.io.ObjectInputStream.resolveClass(ObjectInputStream.java:626)
at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1613)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1518)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1774)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1351)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:371)
at
org.apache.flink.runtime.state.ByteStreamStateHandle.getState(ByteStreamStateHandle.java:63)
at
org.apache.flink.runtime.state.ByteStreamStateHandle.getState(ByteStreamStateHandle.java:33)
at
org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator.restoreInitialState(AbstractUdfStreamOperator.java:83)
at
org.apache.flink.streaming.runtime.tasks.StreamTask.setInitialState(StreamTask.java:276)
at
org.apache.flink.runtime.state.StateUtils.setOperatorState(StateUtils.java:51)
at org.apache.flink.runtime.taskmanager.Task.run(Task.java:541)
{code}
The issue has been reported by a user:
http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/Custom-Class-for-state-checkpointing-td2415.html
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