[infinispan-dev] Weird ClassCastException ..

[Sanne Grinovero]

I'm (rarely) seeing this exception in one of my stress tests.. any
clue about what could be wrong?
I reported a similar one approx a year ago, in that case it was a
value type being unmarshalled as an instance of Class (was also never
resolved).

2014-08-05 00:22:29,521 WARN  [CommandAwareRpcDispatcher]
(OOB-1,main-NodeD-22196) ISPN000220: Problems un-marshalling remote
command from byte buffer
java.lang.ClassCastException: java.lang.String cannot be cast to
org.infinispan.metadata.Metadata
at org.infinispan.commands.write.PutKeyValueCommand.setParameters(PutKeyValueCommand.java:114)
at org.infinispan.commands.RemoteCommandsFactory.fromStream(RemoteCommandsFactory.java:138)
at org.infinispan.marshall.exts.ReplicableCommandExternalizer.readObject(ReplicableCommandExternalizer.java:85)
at org.infinispan.marshall.exts.ReplicableCommandExternalizer.readObject(ReplicableCommandExternalizer.java:1)
at org.infinispan.marshall.core.ExternalizerTable$ExternalizerAdapter.readObject(ExternalizerTable.java:409)
at org.infinispan.marshall.core.ExternalizerTable.readObject(ExternalizerTable.java:214)
at org.infinispan.marshall.core.JBossMarshaller$ExternalizerTableProxy.readObject(JBossMarshaller.java:148)
at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:351)
at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:209)
at org.jboss.marshalling.AbstractObjectInput.readObject(AbstractObjectInput.java:41)
at org.infinispan.marshall.exts.ReplicableCommandExternalizer.readParameters(ReplicableCommandExternalizer.java:101)
at org.infinispan.marshall.exts.CacheRpcCommandExternalizer.readObject(CacheRpcCommandExternalizer.java:153)
at org.infinispan.marshall.exts.CacheRpcCommandExternalizer.readObject(CacheRpcCommandExternalizer.java:1)
at org.infinispan.marshall.core.ExternalizerTable$ExternalizerAdapter.readObject(ExternalizerTable.java:409)
at org.infinispan.marshall.core.ExternalizerTable.readObject(ExternalizerTable.java:214)
at org.infinispan.marshall.core.JBossMarshaller$ExternalizerTableProxy.readObject(JBossMarshaller.java:148)
at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:351)
at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:209)
at org.jboss.marshalling.AbstractObjectInput.readObject(AbstractObjectInput.java:41)
at org.infinispan.commons.marshall.jboss.AbstractJBossMarshaller.objectFromObjectStream(AbstractJBossMarshaller.java:135)
at org.infinispan.marshall.core.VersionAwareMarshaller.objectFromByteBuffer(VersionAwareMarshaller.java:101)
at org.infinispan.commons.marshall.AbstractDelegatingMarshaller.objectFromByteBuffer(AbstractDelegatingMarshaller.java:80)
at org.infinispan.remoting.transport.jgroups.MarshallerAdapter.objectFromBuffer(MarshallerAdapter.java:28)
at org.infinispan.remoting.transport.jgroups.CommandAwareRpcDispatcher.handle(CommandAwareRpcDispatcher.java:204)
at org.jgroups.blocks.RequestCorrelator.handleRequest(RequestCorrelator.java:460)
at org.jgroups.blocks.RequestCorrelator.receiveMessage(RequestCorrelator.java:377)
at org.jgroups.blocks.RequestCorrelator.receive(RequestCorrelator.java:250)
at org.jgroups.blocks.MessageDispatcher$ProtocolAdapter.up(MessageDispatcher.java:674)
at org.jgroups.JChannel.up(JChannel.java:733)
at org.jgroups.stack.ProtocolStack.up(ProtocolStack.java:1030)
at org.jgroups.protocols.RSVP.up(RSVP.java:190)
at org.jgroups.protocols.FRAG2.up(FRAG2.java:165)
at org.jgroups.protocols.FlowControl.up(FlowControl.java:390)
at org.jgroups.protocols.tom.TOA.up(TOA.java:121)
at org.jgroups.protocols.pbcast.GMS.up(GMS.java:1041)
at org.jgroups.protocols.pbcast.STABLE.up(STABLE.java:234)
at org.jgroups.protocols.UNICAST3.deliverMessage(UNICAST3.java:1034)
at org.jgroups.protocols.UNICAST3.handleDataReceived(UNICAST3.java:752)
at org.jgroups.protocols.UNICAST3.up(UNICAST3.java:399)
at org.jgroups.protocols.pbcast.NAKACK2.up(NAKACK2.java:610)
at org.jgroups.protocols.FD_SOCK.up(FD_SOCK.java:297)
at org.jgroups.protocols.Discovery.up(Discovery.java:245)
at org.jgroups.protocols.TP.passMessageUp(TP.java:1551)
at org.jgroups.protocols.TP$MyHandler.run(TP.java:1770)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)