Error while updating a task - Task acquired by some other user

Question

Hi,
I have a task assigned to a Group (AdminGroup). To update the outcome of task ie to approve task i am first acquiring the task and then updating the task outcome.
But while doing so i am getting following error:
Invalid action on workflow task.
Action OUTCOME_UPDATE on task 101d12624092f7d9:-1f79044d:124e34e8057:-7b4e is not valid because of The task has been acquired by some other user..
Contact oracle support if error is not fixable.
at oracle.bpel.services.workflow.task.impl.TaskService.performPreActionValidation(TaskService.java:3408)
at oracle.bpel.services.workflow.task.impl.TaskService.updateTaskOutcomeAndEvaluateRoutingSlip(TaskService.java:1074)
at oracle.bpel.services.workflow.task.impl.TaskService.updateTaskOutcome(TaskService.java:941)
at oracle.bpel.services.workflow.task.impl.TaskService.updateTaskOutcome(TaskService.java:920)
at oracle.bpel.services.workflow.task.ejb.TaskServiceBean.updateTaskOutcome(TaskServiceBean.java:410)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at com.evermind.server.ejb.interceptor.joinpoint.EJBJoinPointImpl.invoke(EJBJoinPointImpl.java:35)
at com.evermind.server.ejb.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:119)
at com.evermind.server.ejb.interceptor.system.DMSInterceptor.invoke(DMSInterceptor.java:52)
at com.evermind.server.ejb.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:119)
at com.evermind.server.ejb.interceptor.system.JAASInterceptor$1.run(JAASInterceptor.java:31)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:396)
at com.evermind.server.ThreadState.runAs(ThreadState.java:622)
at com.evermind.server.ejb.interceptor.system.JAASInterceptor.invoke(JAASInterceptor.java:34)
at com.evermind.server.ejb.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:119)
at com.evermind.server.ejb.interceptor.system.TxRequiresNewInterceptor.invoke(TxRequiresNewInterceptor.java:52)
at com.evermind.server.ejb.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:119)
at com.evermind.server.ejb.interceptor.system.DMSInterceptor.invoke(DMSInterceptor.java:52)
at com.evermind.server.ejb.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:119)
at com.evermind.server.ejb.InvocationContextPool.invoke(InvocationContextPool.java:55)
at com.evermind.server.ejb.StatelessSessionEJBObject.OC4J_invokeMethod(StatelessSessionEJBObject.java:87)
at TaskServiceBean_RemoteProxy_68d4144.updateTaskOutcome(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at com.evermind.server.rmi.RmiMethodCall.run(RmiMethodCall.java:53)
at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:303)
at java.lang.Thread.run(Thread.java:595)
The code that i am using for updating the task outcome is as follows:
The error should not come as the context of user is same for acquiring and updating.
IWorkflowContext wfCtx=wfSvcClient.getTaskQueryService().authenticate("oc4jadmin", "oc4jadmin",
               "jazn.com", "admin");
               ITaskService objITaskService=wfSvcClient.getTaskService();
               objITaskService.acquireTask(wfCtx, strTaskID);
               objITaskService.updateTaskOutcome(wfCtx, strTaskID, "APPROVE");
Here admin is the user that belongs to group AdminGroup and the task is assigned to AdminGroup.
It was working fine a week ago on the same enviornment but from past few days am getting this error.
The BPEL version is 10.1.3.0.
Help appreciated!!
Regards,
Bhavik

Answer 1

hi,
Thanks Marc for the reply.
Before acquiring the task , I have checked the acquiredby column in wftask table in orable schema and its value is null.
So it allows me to acquire the task. The error that i am getting is on updating the task outcome.
While updating it is giving error as: task already acquired by some other user.
This should not happen as the workflow context that i am using for acquiring the task and updating the task is same.
Regards,
Bhavik