When I installed the Cumulative Update for Workflow Manager 1.0 I received a Microsoft.Workflow.Common.FatalException error. The Workflow Manager Backend Service stopped working and when I tried to re-start the service it crashed.

Navigating to the workflow management site gave me a 500 internal server error.

I checked the Event Viewer and the following error message showed up:

Microsoft.Workflow.Common.FatalException: An unrecoverable error occurred. For diagnostic purposes, this English message is associated with the failure: 'A required Workflow Manager configuration 'WorkflowServiceScopeSnapshotProcessBatchSize' is not present. Please add this configuration value.'. ---> System.IO.InvalidDataException: A required Workflow Manager configuration 'WorkflowServiceScopeSnapshotProcessBatchSize' is not present. Please add this configuration value.

at Microsoft.Workflow.Common.AsyncResult.End[TAsyncResult](IAsyncResult result)

at Microsoft.Workflow.Service.WorkflowServiceBackendHost.OnStartCompleted(IAsyncResult result)

--- End of inner exception stack trace ---

at Microsoft.Workflow.Common.Fx.<>c__DisplayClass2.<FailFast>b__0()

at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)

at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)

at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)

at System.Threading.ThreadHelper.ThreadStart()

It seems that there are some configuration values missing from the Workflow Resource Management Database. Add the below values to the WorkflowServiceConfig table:

  • WorkflowServiceScopeSnapshotProcessBatchSize : 20

  • WorkflowServiceScopeSnapshotProcessLoopInterval : 00:05:00

  • WorkflowServiceSuspendedInstanceRetentionDuration : 30.00:00:00

  • WorkflowServiceMaxInstanceCompressedSizeKB : 5120

Restart the Workflow Manager Backend Service and navigate to the Workflow Management Site. You should be seeing the below information on the page:

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