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From Rico Bergmann <i...@ricobergmann.de>
Subject Re: Custom Class for state checkpointing
Date Tue, 18 Aug 2015 10:21:33 GMT
Hi!

Using TupleX is not possible since the state is very big (a Hashtable). 

How would I have to do serialization into a byte array?

Greets. Rico. 



> Am 18.08.2015 um 11:44 schrieb Robert Metzger <rmetzger@apache.org>:
> 
> Hi Rico,
> 
> I'm pretty sure that this is a valid bug you've found, since this case is not yet tested
(afaik).
> We'll fix the issue asap, until then, are you able to encapsulate your state in something
that is available in Flink, for example a TupleX or just serialize it yourself into a byte[]
?
> 
>> On Tue, Aug 18, 2015 at 11:32 AM, Rico Bergmann <info@ricobergmann.de> wrote:
>> Hi!
>> Is it possible to use your own class?
>> I'm using the file state handler at the Jobmanager and implemented the Checkpointed
interface. 
>> 
>> I tried this and got an exception:
>> 
>> 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)
> 

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