Dispatcher failfast is causing the Workflow Manager backend to terminate

Question

im receiving this error on our event log - workflow, with event ID 359: i tried to restart the IIS of the Workflow Server no Luck, and then did the restart of the workflow backend service, still the same and finally i restarted the whole production server.
but still the below error is still popping up. please help on how you solve the issue below. i followed all the trouble shooting tips on this site":
http://technet.microsoft.com/en-us/library/jj193529.aspx
Dispatcher failfast is causing the Workflow Manager backend to terminate. Exception: System.AggregateException: The dispatcher failure rate has reached 11%. InnerException is the last failure; see traces for other failures. ---> System.Runtime.CallbackException:
The call to OnRequestAbort on the WorkflowInstance 'a742053a-ed2c-496d-a103-0adfbd2d4437' threw an exception. This is considered fatal. See inner exception for details. ---> System.AggregateException: Should be processing if notifying about persistable
idle. ---> System.NullReferenceException: Object reference not set to an instance of an object.    at System.Activities.Runtime.ActivityExecutor.CancelRootActivity()    at System.Activities.Hosting.WorkflowInstance.WorkflowInstanceControl.ScheduleCancel()   
at Microsoft.Activities.Hosting.HostedWorkflowInstance.Cancel()    at Microsoft.Activities.Hosting.WorkflowSession.TryDispatchNextSubroutineWorkItem()    at Microsoft.Activities.Hosting.WorkflowSession.OnPaused(HostedWorkflowInstance
pausedInstance)    at Microsoft.Activities.Hosting.HostedWorkflowInstance.ReleaseLock()    at Microsoft.Activities.Hosting.HostedWorkflowInstance.OnNotifyPaused()    at System.Activities.Runtime.ActivityExecutor.OnSchedulerIdle()   

Answer 1

Hi Jeff12.12.12,
seems your workflow got stuck in somewhere in the process,
perhaps you can elaborate me more detail regarding this,
do this workflow is a custom workflow?
is there any steps that we can try to reproduce the issue in our lab?
is there any other error from the ULS log that you able to find regarding this workflows?
please have a try to clean up the cache.ini,
http://support.microsoft.com/kb/939308/en-us
Regards,
Aries
Microsoft Online Community Support
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