[rules-users] Error in the USER TASK work handler

Hi all I have a problem with the User Task work Item when I have an in and out parameters. I am using a simple scenario just to reproduce the Error and exception and the scenario is: Start -> user task with parameter (in, out) -> End I am having the following exception once I execute the Task: ERROR [STDERR] java.lang.NullPointerException ERROR [STDERR] at org.drools.marshalling.impl.MarshallerReaderContext.resolveClass(MarshallerReaderContext.java:78) ERROR [STDERR] at java.io.ObjectInputStream.readNonProxyDesc(Unknown Source) ERROR [STDERR] at java.io.ObjectInputStream.readClassDesc(Unknown Source) ERROR [STDERR] at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source) ERROR [STDERR] at java.io.ObjectInputStream.readObject0(Unknown Source) ERROR [STDERR] at java.io.ObjectInputStream.readObject(Unknown Source) ERROR [STDERR] at org.drools.marshalling.impl.InputMarshaller.readWorkItem(InputMarshaller.java:829) ERROR [STDERR] at org.drools.persistence.processinstance.WorkItemInfo.getWorkItem(WorkItemInfo.java:86) ERROR [STDERR] at org.drools.persistence.processinstance.JPAWorkItemManager.completeWorkItem(JPAWorkItemManager.java:90) ERROR [STDERR] at org.drools.command.runtime.process.CompleteWorkItemCommand.execute(CompleteWorkItemCommand.java:46) ERROR [STDERR] at org.drools.command.runtime.process.CompleteWorkItemCommand.execute(CompleteWorkItemCommand.java:12) ERROR [STDERR] at org.drools.persistence.session.SingleSessionCommandService.execute(SingleSessionCommandService.java:254) ERROR [STDERR] at org.drools.command.impl.CommandBasedStatefulKnowledgeSession$1.completeWorkItem(CommandBasedStatefulKnowledgeSession.java:118 ERROR [STDERR] at org.drools.process.workitem.wsht.CommandBasedWSHumanTaskHandler$GetResultContentResponseHandler.execute(CommandBasedWSHumanTa va:297) ERROR [STDERR] at org.drools.task.service.TaskClientHandler.messageReceived(TaskClientHandler.java:139) ERROR [STDERR] at org.apache.mina.core.filterchain.DefaultIoFilterChain$TailFilter.messageReceived(DefaultIoFilterChain.java:752) ERROR [STDERR] at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:414) ERROR [STDERR] at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1200(DefaultIoFilterChain.java:49) ERROR [STDERR] at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:832) ERROR [STDERR] at org.apache.mina.filter.codec.ProtocolCodecFilter$ProtocolDecoderOutputImpl.flush(ProtocolCodecFilter.java:379) ERROR [STDERR] at org.apache.mina.filter.codec.ProtocolCodecFilter.messageReceived(ProtocolCodecFilter.java:173) ERROR [STDERR] at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:414) ERROR [STDERR] at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1200(DefaultIoFilterChain.java:49) ERROR [STDERR] at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:832) ERROR [STDERR] at org.apache.mina.core.filterchain.DefaultIoFilterChain$HeadFilter.messageReceived(DefaultIoFilterChain.java:616) ERROR [STDERR] at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:414) ERROR [STDERR] at org.apache.mina.core.filterchain.DefaultIoFilterChain.fireMessageReceived(DefaultIoFilterChain.java:408) ERROR [STDERR] at org.apache.mina.core.polling.AbstractPollingIoProcessor.read(AbstractPollingIoProcessor.java:578) ERROR [STDERR] at org.apache.mina.core.polling.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:540) ERROR [STDERR] at org.apache.mina.core.polling.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:532) ERROR [STDERR] at org.apache.mina.core.polling.AbstractPollingIoProcessor.access$400(AbstractPollingIoProcessor.java:58) ERROR [STDERR] at org.apache.mina.core.polling.AbstractPollingIoProcessor$Worker.run(AbstractPollingIoProcessor.java:857) ERROR [STDERR] at org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:51) ERROR [STDERR] at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source) ERROR [STDERR] at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) ERROR [STDERR] at java.lang.Thread.run(Unknown Source) INFO [STDOUT] [2009:12:337 09:12:671:exception] Uncaught exception on client INFO [STDOUT] java.lang.RuntimeException: Could not rollback transaction INFO [STDOUT] at org.drools.persistence.session.SingleSessionCommandService.execute(SingleSessionCommandService.java:283) INFO [STDOUT] at org.drools.command.impl.CommandBasedStatefulKnowledgeSession$1.completeWorkItem(CommandBasedStatefulKnowledgeSession.java:118 INFO [STDOUT] at org.drools.process.workitem.wsht.CommandBasedWSHumanTaskHandler$GetResultContentResponseHandler.execute(CommandBasedWSHumanTa va:297) INFO [STDOUT] at org.drools.task.service.TaskClientHandler.messageReceived(TaskClientHandler.java:139) INFO [STDOUT] at org.apache.mina.core.filterchain.DefaultIoFilterChain$TailFilter.messageReceived(DefaultIoFilterChain.java:752) INFO [STDOUT] at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:414) INFO [STDOUT] at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1200(DefaultIoFilterChain.java:49) INFO [STDOUT] at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:832) INFO [STDOUT] at org.apache.mina.filter.codec.ProtocolCodecFilter$ProtocolDecoderOutputImpl.flush(ProtocolCodecFilter.java:379) INFO [STDOUT] at org.apache.mina.filter.codec.ProtocolCodecFilter.messageReceived(ProtocolCodecFilter.java:173) INFO [STDOUT] at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:414) INFO [STDOUT] at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1200(DefaultIoFilterChain.java:49) INFO [STDOUT] at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:832) INFO [STDOUT] at org.apache.mina.core.filterchain.DefaultIoFilterChain$HeadFilter.messageReceived(DefaultIoFilterChain.java:616) INFO [STDOUT] at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:414) INFO [STDOUT] at org.apache.mina.core.filterchain.DefaultIoFilterChain.fireMessageReceived(DefaultIoFilterChain.java:408) INFO [STDOUT] at org.apache.mina.core.polling.AbstractPollingIoProcessor.read(AbstractPollingIoProcessor.java:578) INFO [STDOUT] at org.apache.mina.core.polling.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:540) INFO [STDOUT] at org.apache.mina.core.polling.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:532) INFO [STDOUT] at org.apache.mina.core.polling.AbstractPollingIoProcessor.access$400(AbstractPollingIoProcessor.java:58) INFO [STDOUT] at org.apache.mina.core.polling.AbstractPollingIoProcessor$Worker.run(AbstractPollingIoProcessor.java:857) INFO [STDOUT] at org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:51) INFO [STDOUT] at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source) INFO [STDOUT] at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) INFO [STDOUT] at java.lang.Thread.run(Unknown Source) INFO [STDOUT] Caused by: java.lang.RuntimeException: Could not execute command INFO [STDOUT] at org.drools.persistence.session.SingleSessionCommandService.execute(SingleSessionCommandService.java:280) INFO [STDOUT] ... 24 more INFO [STDOUT] Caused by: java.lang.NullPointerException INFO [STDOUT] at org.drools.marshalling.impl.MarshallerReaderContext.resolveClass(MarshallerReaderContext.java:78) INFO [STDOUT] at java.io.ObjectInputStream.readNonProxyDesc(Unknown Source) INFO [STDOUT] at java.io.ObjectInputStream.readClassDesc(Unknown Source) INFO [STDOUT] at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source) INFO [STDOUT] at java.io.ObjectInputStream.readObject0(Unknown Source) INFO [STDOUT] at java.io.ObjectInputStream.readObject(Unknown Source) INFO [STDOUT] at org.drools.marshalling.impl.InputMarshaller.readWorkItem(InputMarshaller.java:829) INFO [STDOUT] at org.drools.persistence.processinstance.WorkItemInfo.getWorkItem(WorkItemInfo.java:86) INFO [STDOUT] at org.drools.persistence.processinstance.JPAWorkItemManager.completeWorkItem(JPAWorkItemManager.java:90) INFO [STDOUT] at org.drools.command.runtime.process.CompleteWorkItemCommand.execute(CompleteWorkItemCommand.java:46) INFO [STDOUT] at org.drools.command.runtime.process.CompleteWorkItemCommand.execute(CompleteWorkItemCommand.java:12) INFO [STDOUT] at org.drools.persistence.session.SingleSessionCommandService.execute(SingleSessionCommandService.java:254) INFO [STDOUT] ... 24 more Regards Ram -- View this message in context: http://n3.nabble.com/Error-in-the-USER-TASK-work-handler-tp67037p67037.html Sent from the Drools - User mailing list archive at Nabble.com.