I created a JIRA for the issue: https://issues.apache.org/jira/browse/FLINK-2543
Once I'm done with the Kafka pull request, I'll take a look into this. On Tue, Aug 18, 2015 at 1:56 PM, Stephan Ewen <se...@apache.org> wrote: > Yep, that is a valid bug! > State is apparently not resolved with the correct classloader. > > As a workaround, you can checkpoint byte arrays and serialize/deserialize > the state into byte arrays yourself. You can use the apache commons > SerializationUtil class, or Flinks InstantiationUtil class for that. > > You can get the ClassLoader for the user code (needed for deserialization) > via "getRuntimeContext().getUserCodeClassLoader()". > > Let us know if that workaround works. We'll try to get a fix for that out > very soon! > > Greetings, > Stephan > > > > On Tue, Aug 18, 2015 at 12:23 PM, Robert Metzger <rmetz...@apache.org> > wrote: > >> Java's HashMap is serializable. >> If it is only the map, you can just use the HashMap<> as the state. >> >> If you have more data, you can use TupleX, for example: >> >> Tuple2<HashMap<Integer, String>, Long>(myMap, myLong); >> >> >> On Tue, Aug 18, 2015 at 12:21 PM, Rico Bergmann <i...@ricobergmann.de> >> wrote: >> >>> 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 <rmetz...@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 <i...@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) >>>> >>>> >>> >> >
