Oracle Datasource en JBPM Suite

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Estoy teniendo problemas al usar un datasource Oracle para JBPM.
La version del motor es 10.2.0.4.
Tengo un proceso definido y compilado. Me deja iniciarlo. El usuario con permisos lo puede "solicitar", pero al intentar ejecutarlo me da el siguiente error:

Unexpected error encountered : java.lang.IllegalStateException:We cannot have more than one BAM Task Summary for the task id = xx

En el server log, escribe....

16:20:32,522 WARN [org.jbpm.services.task.lifecycle.listeners.BAMTaskEventListener] (http-/0.0.0.0:8080-6) Something went wrong with the Task BAM Listener
16:20:32,522 WARN [org.jbpm.services.task.persistence.TaskTransactionInterceptor] (http-/0.0.0.0:8080-6) Could not commit session: java.lang.IllegalStateException: We cannot have more than one BAM Task Summary for the task id = 107
at org.jbpm.services.task.lifecycle.listeners.BAMTaskEventListener.createOrUpdateTask(BAMTaskEventListener.java:257) [jbpm-human-task-audit-6.0.3-redhat-4.jar:6.0.3-redhat-4]
at org.jbpm.services.task.lifecycle.listeners.BAMTaskEventListener.createOrUpdateTask(BAMTaskEventListener.java:186) [jbpm-human-task-audit-6.0.3-redhat-4.jar:6.0.3-redhat-4]
at org.jbpm.services.task.lifecycle.listeners.BAMTaskEventListener.afterTaskStartedEvent(BAMTaskEventListener.java:73) [jbpm-human-task-audit-6.0.3-redhat-4.jar:6.0.3-redhat-4]
at org.jbpm.services.task.events.TaskEventSupport.fireAfterTaskStarted(TaskEventSupport.java:171) [jbpm-human-task-core-6.0.3-redhat-4.jar:6.0.3-redhat-4]
at org.jbpm.services.task.internals.lifecycle.MVELLifeCycleManager.taskOperation(MVELLifeCycleManager.java:369) [jbpm-human-task-core-6.0.3-redhat-4.jar:6.0.3-redhat-4]
at org.jbpm.services.task.identity.UserGroupLifeCycleManagerDecorator.taskOperation(UserGroupLifeCycleManagerDecorator.java:46) [jbpm-human-task-core-6.0.3-redhat-4.jar:6.0.3-redhat-4]
at org.jbpm.services.task.impl.TaskInstanceServiceImpl.start(TaskInstanceServiceImpl.java:204) [jbpm-human-task-core-6.0.3-redhat-4.jar:6.0.3-redhat-4]
at org.jbpm.services.task.commands.StartTaskCommand.execute(StartTaskCommand.java:48) [jbpm-human-task-core-6.0.3-redhat-4.jar:6.0.3-redhat-4]
at org.jbpm.services.task.commands.StartTaskCommand.execute(StartTaskCommand.java:30) [jbpm-human-task-core-6.0.3-redhat-4.jar:6.0.3-redhat-4]
at org.jbpm.services.task.commands.CompositeCommand.execute(CompositeCommand.java:38) [jbpm-human-task-core-6.0.3-redhat-4.jar:6.0.3-redhat-4]
at org.jbpm.services.task.commands.TaskCommandExecutorImpl$SelfExecutionCommandService.execute(TaskCommandExecutorImpl.java:65) [jbpm-human-task-core-6.0.3-redhat-4.jar:6.0.3-redhat-4]
at org.drools.core.command.impl.AbstractInterceptor.executeNext(AbstractInterceptor.java:41) [drools-core-6.0.3-redhat-4.jar:6.0.3-redhat-4]
at org.jbpm.services.task.persistence.TaskTransactionInterceptor.execute(TaskTransactionInterceptor.java:54) [jbpm-human-task-core-6.0.3-redhat-4.jar:6.0.3-redhat-4]
at org.jbpm.services.task.commands.TaskCommandExecutorImpl.execute(TaskCommandExecutorImpl.java:40) [jbpm-human-task-core-6.0.3-redhat-4.jar:6.0.3-redhat-4]
at org.jbpm.services.task.impl.command.CommandBasedTaskService.start(CommandBasedTaskService.java:245) [jbpm-human-task-core-6.0.3-redhat-4.jar:6.0.3-redhat-4]
at org.jbpm.console.ng.ht.backend.server.TaskServiceEntryPointImpl.startBatch(TaskServiceEntryPointImpl.java:292) [jbpm-console-ng-human-tasks-backend-6.0.3-redhat-4.jar:6.0.3-redhat-4]
at org.jbpm.console.ng.ht.backend.server.TaskServiceEntryPointImpl$Proxy$$$_WeldClientProxy.startBatch(TaskServiceEntryPointImpl$Proxy$$$_WeldClientProxy.java) [jbpm-console-ng-human-tasks-backend-6.0.3-redhat-4.jar:6.0.3-redhat-4]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [rt.jar:1.6.0_26]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) [rt.jar:1.6.0_26]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) [rt.jar:1.6.0_26]
at java.lang.reflect.Method.invoke(Method.java:597) [rt.jar:1.6.0_26]
at org.jboss.errai.bus.server.io.AbstractRPCMethodCallback.invokeMethodFromMessage(AbstractRPCMethodCallback.java:48) [errai-bus-2.4.4.Final-redhat-8.jar:2.4.4.Final-redhat-8]
at org.jboss.errai.bus.server.io.VoidRPCEndpointCallback.callback(VoidRPCEndpointCallback.java:20) [errai-bus-2.4.4.Final-redhat-8.jar:2.4.4.Final-redhat-8]
at org.jboss.errai.bus.server.io.RemoteServiceCallback.callback(RemoteServiceCallback.java:54) [errai-bus-2.4.4.Final-redhat-8.jar:2.4.4.Final-redhat-8]
at org.jboss.errai.cdi.server.CDIExtensionPoints$3.callback(CDIExtensionPoints.java:499) [errai-weld-integration-2.4.4.Final-redhat-8.jar:2.4.4.Final-redhat-8]
at org.jboss.errai.bus.server.DeliveryPlan.deliver(DeliveryPlan.java:47) [errai-bus-2.4.4.Final-redhat-8.jar:2.4.4.Final-redhat-8]
at org.jboss.errai.bus.server.ServerMessageBusImpl.sendGlobal(ServerMessageBusImpl.java:284) [errai-bus-2.4.4.Final-redhat-8.jar:2.4.4.Final-redhat-8]
at org.jboss.errai.bus.server.SimpleDispatcher.dispatchGlobal(SimpleDispatcher.java:46) [errai-bus-2.4.4.Final-redhat-8.jar:2.4.4.Final-redhat-8]
at org.jboss.errai.bus.server.service.ErraiServiceImpl.store(ErraiServiceImpl.java:97) [errai-bus-2.4.4.Final-redhat-8.jar:2.4.4.Final-redhat-8]
at org.jboss.errai.bus.server.service.ErraiServiceImpl.store(ErraiServiceImpl.java:114) [errai-bus-2.4.4.Final-redhat-8.jar:2.4.4.Final-redhat-8]
at org.jboss.errai.bus.server.servlet.DefaultBlockingServlet.doPost(DefaultBlockingServlet.java:140) [errai-bus-2.4.4.Final-redhat-8.jar:2.4.4.Final-redhat-8]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:754) [jboss-servlet-api_3.0_spec-1.0.2.Final-redhat-1.jar:1.0.2.Final-redhat-1]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:847) [jboss-servlet-api_3.0_spec-1.0.2.Final-redhat-1.jar:1.0.2.Final-redhat-1]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:295) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
at org.jboss.solder.servlet.exception.CatchExceptionFilter.doFilter(CatchExceptionFilter.java:65) [solder-impl-3.2.1.Final.jar:3.2.1.Final]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
at org.jboss.solder.servlet.event.ServletEventBridgeFilter.doFilter(ServletEventBridgeFilter.java:74) [solder-impl-3.2.1.Final.jar:3.2.1.Final]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
at org.jbpm.designer.web.filter.impl.PluggableFilter.doFilter(PluggableFilter.java:70) [jbpm-designer-backend-6.0.3-redhat-4.jar:6.0.3-redhat-4]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
at org.uberfire.security.server.UberFireSecurityFilter.doFilter(UberFireSecurityFilter.java:266) [uberfire-security-server-0.3.3-redhat-4.jar:0.3.3-redhat-4]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:149) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:499) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
at org.jboss.as.jpa.interceptor.WebNonTxEmCloserValve.invoke(WebNonTxEmCloserValve.java:50) [jboss-as-jpa-7.2.1.Final-redhat-10.jar:7.2.1.Final-redhat-10]
at org.jboss.as.jpa.interceptor.WebNonTxEmCloserValve.invoke(WebNonTxEmCloserValve.java:50) [jboss-as-jpa-7.2.1.Final-redhat-10.jar:7.2.1.Final-redhat-10]
at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:169) [jboss-as-web-7.2.1.Final-redhat-10.jar:7.2.1.Final-redhat-10]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:145) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:97) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
at org.apache.catalina.authenticator.SingleSignOn.invoke(SingleSignOn.java:408) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:102) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:336) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:653) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:920) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
at java.lang.Thread.run(Thread.java:662) [rt.jar:1.6.0_26]

Sin embargo, funciona perfecto con la base por default H2.

Gracias!
Daniela.

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