[infinispan-dev] Weird ClassCastException ..

Wed Aug 6 14:04:57 EDT 2014

Sanne, you really need to say more, I was hoping to see more information in
the PR/JIRA but both descriptions are very terse :)

If I understand correctly, the problem is that you're keeping a reference
to a cache value and modifying it without a put(), which could break
marshalling for a concurrent put()?

Cheers
Dan

On Tue, Aug 5, 2014 at 5:02 PM, Sanne Grinovero <sanne at infinispan.org>
wrote:

> I've figured it out.
> I'll not explain it yet, it's such a nice puzzler :-P
> @Galder you were close: let me say JGroups is the only one not related.
>
> On 5 August 2014 14:01, Galder Zamarreño <galder at redhat.com> wrote:
> >
> > On 05 Aug 2014, at 01:33, Sanne Grinovero <sanne at infinispan.org> wrote:
> >
> >> I'm (rarely) seeing this exception in one of my stress tests.. any
> >> clue about what could be wrong?
> >
> > Hmmm, it smells like a concurrency issue, e.g. buffer mixup, in either
> jboss marshalling, jgroups or the externalizer layer in Infinispan.
> >
> >> 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).
> >
> > ^ Do you have a JIRA for it?
> >
> > Please definitely create one for this new CCE.
> >
> > Cheers,
> >
> >>
> >> 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)
> >> _______________________________________________
> >> infinispan-dev mailing list
> >> infinispan-dev at lists.jboss.org
> >> https://lists.jboss.org/mailman/listinfo/infinispan-dev
> >
> >
> > --
> > Galder Zamarreño
> > galder at redhat.com
> > twitter.com/galderz
> >
> >
> > _______________________________________________
> > infinispan-dev mailing list
> > infinispan-dev at lists.jboss.org
> > https://lists.jboss.org/mailman/listinfo/infinispan-dev
>
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