[rules-users] RuleBase serialization error in a cluster

[nir s]

Hi,



We use drools in our application and store a compiled KnowledgeBase in
cache, all worked fine until we moved into cluster.



The stack trace:



2010-10-31 12:25:35,333 ERROR [] [org.jgroups.blocks.RpcDispatcher]
exception marshalling object

java.lang.ClassCastException:
org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectInput
cannot be cast to java.io.ObjectInputStream

        at
org.drools.common.AbstractRuleBase.readExternal(AbstractRuleBase.java:232)

        at
org.drools.reteoo.ReteooRuleBase.readExternal(ReteooRuleBase.java:179)

        at
org.drools.impl.KnowledgeBaseImpl.readExternal(KnowledgeBaseImpl.java:87)

        at
org.jboss.serial.persister.ExternalizePersister.readData(ExternalizePersister.java:72)

        at
org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.readObjectDescriptionFromStreaming(ObjectDescriptorFactory.java:412)

        at
org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.objectFromDescription(ObjectDescriptorFactory.java:82)

        at
org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectInput.readObject(DataContainer.java:643)

        at
org.jboss.serial.persister.RegularObjectPersister.readSlotWithFields(RegularObjectPersister.java:353)

        at
org.jboss.serial.persister.RegularObjectPersister.defaultRead(RegularObjectPersister.java:273)

        at
org.jboss.serial.persister.RegularObjectPersister.readData(RegularObjectPersister.java:241)

        at
org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.readObjectDescriptionFromStreaming(ObjectDescriptorFactory.java:412)

        at
org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.objectFromDescription(ObjectDescriptorFactory.java:82)

        at
org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectInput.readObject(DataContainer.java:643)

        at
org.jboss.serial.io.JBossObjectInputStreamSharedTree.readObjectOverride(JBossObjectInputStreamSharedTree.java:61)

        at
org.jboss.cache.marshall.JBossObjectStreamFactory$JBossObjectInputStreamOverride.readObjectOverride(JBossObjectStreamFactory.java:33)

        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:345)

        at
org.jboss.cache.marshall.TreeCacheMarshaller140.unmarshallObject(TreeCacheMarshaller140.java:432)

        at
org.jboss.cache.marshall.TreeCacheMarshaller140.unmarshallMethodCall(TreeCacheMarshaller140.java:493)

        at
org.jboss.cache.marshall.TreeCacheMarshaller140.unmarshallObject(TreeCacheMarshaller140.java:436)

        at
org.jboss.cache.marshall.TreeCacheMarshaller140.unmarshallMethodCall(TreeCacheMarshaller140.java:493)

        at
org.jboss.cache.marshall.TreeCacheMarshaller140.unmarshallObject(TreeCacheMarshaller140.java:436)

        at
org.jboss.cache.marshall.TreeCacheMarshaller140.unmarshallObject(TreeCacheMarshaller140.java:405)

        at
org.jboss.cache.marshall.TreeCacheMarshaller140.objectFromStream(TreeCacheMarshaller140.java:126)

        at
org.jboss.cache.marshall.VersionAwareMarshaller.objectFromByteBuffer(VersionAwareMarshaller.java:167)

        at org.jgroups.blocks.RpcDispatcher.handle(RpcDispatcher.java:254)

        at
org.jgroups.blocks.RequestCorrelator.handleRequest(RequestCorrelator.java:654)

        at
org.jgroups.blocks.RequestCorrelator.receiveMessage(RequestCorrelator.java:544)

        at
org.jgroups.blocks.RequestCorrelator.receive(RequestCorrelator.java:367)

        at
org.jgroups.blocks.MessageDispatcher$ProtocolAdapter.up(MessageDispatcher.java:777)

        at org.jgroups.JChannel.up(JChannel.java:1091)

        at org.jgroups.stack.ProtocolStack.up(ProtocolStack.java:382)

        at
org.jgroups.stack.ProtocolStack.receiveUpEvent(ProtocolStack.java:398)

        at org.jgroups.stack.Protocol.passUp(Protocol.java:520)

        at
org.jgroups.protocols.pbcast.STREAMING_STATE_TRANSFER.up(STREAMING_STATE_TRANSFER.java:280)

        at org.jgroups.stack.UpHandler.run(Protocol.java:60)





any idea?



BR,



Nir
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