SharePoint 2010. I've been using out of the box approval workflow for several month now. I did some minor changes to it, like to who and when emails should be send, but that's all.
Then out of a sudden it stopped working. New request status is "Failed on start (retrying)". Sometimes (!) status is "In Progress", but no tasks are created. In both cases there is nothing on workflow history and error report is also empty (it even cause an error "Report contains no data").
I'm sure that I didn't change anything in a workflow. The only think that I changed was an InfoPath form, but I only added there field "Created By", so I would see in calendar later who created this request. I couldn't see how this might affect workflow process.
I'm confused as I don't even know where to start searching for the solution. Why this might happen? Any ideas are very welcome!