I'm still working on writing a test case for reproducing the issue. Which Flink version are you using? If you are using 0.10-SNAPSHOT, which exact commit?
On Tue, Aug 18, 2015 at 2:09 PM, Robert Metzger <rmetz...@apache.org> wrote: > 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) >>>>> >>>>> >>>> >>> >> >
