I can't figure out which is the best sub-forum for this question (why are there so many?), and I suspect I might be the only person in the whole world attempting to do this, but here goes...I had an application based on the .NET Web ADF originally built in 9.3. The server is being upgraded to 10.1 so the application needs to move with it (re-architecting is not an option).The automated upgrade utility was not the smoothest process and I have since fixed a couple of very obvious bugs in the ESRI JavaScript. However there is one problem I can't figure out:Intermittently, after a full page reload, the map fails to render. The application calls ESRI.ArcGIS.ADF.Web.UI.WebControls.MapHandler.ashx requesting a URL for the new map image. Sometimes that handler returns{"code":400,"type":"error","errorMessage":"Resource <service name> not found"}
The application then requests an image from ESRI.ArcGIS.ADF.Web.MimeImage.ashx passing an ImgID parameter that seems to be randomly made-up - I can't see it in any previous requests and it obviously isn't provided by MapHandler.ashx. The server then responds with a 404. If I reload the application again the same requests are sent with exactly the same parameters (in the example I saw the post-reload request even passed the same 't' parameter which I assume should represent time) and a successful response is returned.Can anyone tell me why my service is reported as unavailable? ArcGIS Server is not logging any errors or warnings.
