TC ONG [https://community.jboss.org/people/devilkazuya99] created the discussion "java.lang.String cannot be cast to org.jbpm.task.utils.MarshalledContentWrapper" To view the discussion, visit: https://community.jboss.org/message/740612#740612 --------------------------------------------------------------                String respond = "SOME_VALUE";           Map result = new HashMap();           result.put("answer", respond);           ContentData contentData = null;           ByteArrayOutputStream bos = new ByteArrayOutputStream();           ObjectOutputStream out;           try {                out = new ObjectOutputStream(bos);                out.writeObject(result);                out.close();                contentData = new ContentData();                contentData.setContent(bos.toByteArray());                contentData.setAccessType(AccessType.Inline);           } catch (IOException ioe) {                ioe.printStackTrace();           }                      localTaskService.complete(taskId, userName, contentData); My process has a sequence of human tasks. When I ran the code above, the first task executed fine, but the second task gives me:      java.lang.String cannot be cast to org.jbpm.task.utils.MarshalledContentWrapper Any idea why it suddently doesn't work? Full stack trace: Application Message - java.lang.String cannot be cast to org.jbpm.task.utils.MarshalledContentWrapper java.lang.ClassCastException: java.lang.String cannot be cast to org.jbpm.task.utils.MarshalledContentWrapper      at org.jbpm.task.utils.ContentMarshallerHelper.unmarshall(ContentMarshallerHelper.java:157)      at org.jbpm.process.workitem.wsht.SyncWSHumanTaskHandler$TaskCompletedHandler.handleCompletedTask(SyncWSHumanTaskHandler.java:354)      at org.jbpm.process.workitem.wsht.SyncWSHumanTaskHandler$TaskCompletedHandler.execute(SyncWSHumanTaskHandler.java:329)      at org.jbpm.task.service.local.LocalTaskService$SimpleEventTransport.trigger(LocalTaskService.java:307)      at org.jbpm.task.event.MessagingTaskEventListener.taskCompleted(MessagingTaskEventListener.java:73)      at org.jbpm.task.event.TaskEventSupport.fireTaskCompleted(TaskEventSupport.java:46)      at org.jbpm.task.service.TaskServiceSession.postTaskCompleteOperation(TaskServiceSession.java:502)      at org.jbpm.task.service.TaskServiceSession.taskOperation(TaskServiceSession.java:468)      at org.jbpm.task.service.local.LocalTaskService.complete(LocalTaskService.java:80) -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/740612#740612] Start a new discussion in jBPM at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]