[jboss-user] [jBPM] - completing human task - NoSuchFieldError: classLoader

[wishmaster7]

wishmaster7 [https://community.jboss.org/people/wishmaster7] created the discussion

"completing human task - NoSuchFieldError: classLoader"

To view the discussion, visit: https://community.jboss.org/message/802416#802416

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Hi all,

I have found something very strange when I complete a Human Task. Here is what I do:

Map<String, Object> result = new HashMap<String, Object>();
result.put("Result", action);
taskService.completeWithResults(taskId, userId, result);

and I have the following error:

java.lang.NoSuchFieldError: classLoader
    at org.jbpm.task.utils.ContentMarshallerHelper.unmarshall(ContentMarshallerHelper.java:107)
    at org.jbpm.process.workitem.wsht.GenericHTWorkItemHandler$TaskCompletedHandler.handleCompletedTask(GenericHTWorkItemHandler.java:260)
    at org.jbpm.process.workitem.wsht.GenericHTWorkItemHandler$TaskCompletedHandler.execute(GenericHTWorkItemHandler.java:234)
    at org.jbpm.task.service.local.LocalTaskService$SimpleEventTransport.trigger(LocalTaskService.java:329)
    at org.jbpm.task.event.MessagingTaskEventListener.triggerPayload(MessagingTaskEventListener.java:76)
    at org.jbpm.task.event.MessagingTaskEventListener.handleEvent(MessagingTaskEventListener.java:92)
    at org.jbpm.task.event.MessagingTaskEventListener.taskCompleted(MessagingTaskEventListener.java:109)
    at org.jbpm.task.event.TaskEventSupport.fireTaskCompleted(TaskEventSupport.java:49)
    at org.jbpm.task.service.TaskServiceSession.postTaskCompleteOperation(TaskServiceSession.java:569)
    at org.jbpm.task.service.TaskServiceSession.taskOperation(TaskServiceSession.java:495)
    at org.jbpm.task.service.local.LocalTaskService.complete(LocalTaskService.java:83)
    at org.jbpm.task.service.local.LocalTaskService.completeWithResults(LocalTaskService.java:91)


So, I search in the code, and I find :

MarshallerReaderContext context = null;
context.classLoader = ContentMarshallerHelper.class.getClassLoader();

BUT... (something I can't explain), MarshallerReaderContext has no classLoader. This throws the error above.

Someone knows? Any help would be apreciated.
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[Thomas Setiabudi]

Thomas Setiabudi [https://community.jboss.org/people/thomas.setiabudi] created the discussion

"Re: completing human task - NoSuchFieldError: classLoader"

To view the discussion, visit: https://community.jboss.org/message/802537#802537

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Hi wishmaster7,

use something like this with JBPM5.4



java.util.Map<String, Object> result = new java.util.HashMap<String, Object>();
                    result.put("Result", action);
 
                    org.jbpm.task.service.ContentData contentData = org.jbpm.task.utils.ContentMarshallerHelper.marshal(result, null);
                    client.complete(taskId, userId, contentData);
 



Regards,
Thomas Setiabudi
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[wishmaster7]

wishmaster7 [https://community.jboss.org/people/wishmaster7] created the discussion

"Re: completing human task - NoSuchFieldError: classLoader"

To view the discussion, visit: https://community.jboss.org/message/802560#802560

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Hi Thomas,

This is a good idea, and I have already tried it. But if you look at the error stack trace, you see that completeWithResults() calls complete(), which calls the marshaller another time and makes the error. So the same problem happens.
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[wishmaster7]

wishmaster7 [https://community.jboss.org/people/wishmaster7] created the discussion

"Re: completing human task - NoSuchFieldError: classLoader"

To view the discussion, visit: https://community.jboss.org/message/802563#802563

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if someone has the same problem, I found the solution:

I was using:

- jbpm-human-task-core-5.4.0.Final.jar
- drools-core-5.4.0.Final.jar

instead, use:

- jbpm-human-task-core-5.4.0.Final.jar
- drools-core-*5.5.0*.Final.jar
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