Workflows communication exception

I had deployed a workflow wsp using powershell and while activating a feature, I received an exception in browser:

Microsoft.Workflow.Client.WorkflowCommunicationException: The request was aborted: The request was canceled. Client ActivityId : <<guid>> ---> System.Net.WebException: The request was aborted: The request was canceled.

Though all services were running, workflow manager was connected; there was no clue why this happened. Just by resetting the IIS, the issue got solved.