Exception while starting standard workflows

[alper]

I am trying to start using the existing workflows, just for test, and the GUI shows the message: "Task started", but have the whole stack of exceptions in Jboss' server.log, starting from:

18:09:39,577 ERROR [org.infinispan.interceptors.InvocationContextInterceptor] (http-/0.0.0.0:8081-6) ISPN000136: Execution error: org.infinispan.marshall.NotSerializableException: org.activiti.workflow.simple.converter.json.SimpleWorkflowJsonConverter
Caused by: an exception which occurred:
   in field simpleWorkflowJsonConverter
   in field application
   in field repaintRequestListeners
   in object java.util.HashMap@983e8ef0
   in object org.jboss.as.clustering.SimpleMarshalledValue@983e8ef0
   in object org.infinispan.util.FastCopyHashMap@7d18fe02
   in object org.infinispan.atomic.AtomicHashMap@7bf2bc10
   in object org.infinispan.container.entries.ImmortalCacheEntry@d52794d3
   in object org.infinispan.loaders.bucket.Bucket@424e60c6

So, I have no idea, what to do then. As I understand, it should work out of box.
Should I do anything with the H2 database? It seems it's working, because I can see tables in the Activiti Explorer's GUI, and they have data.

[alper]

Resolved, the problem was with the JBoss

[jbarrez]

Could you add here what the problem was and how you solved? If oeople find this thrread by googling keywords in your post, they might have the same probelem …

[alper]

Sure, you are right, though I deem it is a quite temporary decision.
One should go to the file $JBOSS_HOME/standalone/configuration/standalone.xml and comment the subsystem of Infinispan module:
< subsystem xmlns="urn:jboss:domain:infinispan:1.4" >
….
< /subsystem >

(I inserted whitespaces around the angle brackets to make them visible here)
That's it.
It is not obligatory, workflow still should work, but one will get exceptions in JBoss.