On Fri, Sep 2, 2011 at 4:33 PM, Kent Belan <kbe...@mchsi.com> wrote: > I have an application that stays running 24/7 and during some parts of the > day can have very heavy volume. > > Every once in a while and not at the same place in the code, the program > will error with 1104 - Error reading file. "The operating system returned an > error while VFP was attempting to read the specified file" > > If I stop the EXE and start it right back up, everything is good. > > Nothing is done to the computer, no reboot or remapping of network drives, > just restart the VFP EXE. > > This is a very unique setup.
Kent: You may be surprised to learn that it's not. Many VFP developers have implemented similar farms of VFP apps feed by job queues. I've worked on a couple of projects that used something similar. It's a dirty little secret that apps that support pools of worker threads like IIS or MySQL terminate the threads after so many calls, or so much time, in order to avoid them failing in the various modes long-running threads do: memory bloat, failed garbage collection, etc. > Since VFP is not multi-threaded, there is a VB > program that receives requests from a TCP/IP socket and then passes the > request to one of many VFP EXE's waiting for a transaction. > > There can be 2 to 20 VFP EXE's running at the same time waiting and > processing requests. Are they all running on the same machine? Which OS (es)? > > Everything works great, until the 1104 error starts happening and then all > VFP EXE's get the same error and all have to be shut down and restarted. > > It does not happen very often, but when it happens it is a real hassle and > shuts down the operations. > > Any ideas on what may cause the 1104 and a possible solution ? Yeah, something broke the shared file handle and all the apps lose the connection. How is VFP getting the new job? Is is trying to read a file or a DBF it keeps open long-term? Try closing it and opening it only when needed. Google's got a couple of useful hits on "VFP Error 1104" -- Ted Roche Ted Roche & Associates, LLC http://www.tedroche.com _______________________________________________ Post Messages to: ProFox@leafe.com Subscription Maintenance: http://leafe.com/mailman/listinfo/profox OT-free version of this list: http://leafe.com/mailman/listinfo/profoxtech Searchable Archive: http://leafe.com/archives/search/profox This message: http://leafe.com/archives/byMID/profox/cacw6n4u3x1_jsj7mhrubnk7idvdajkk+mpg4+hr_up-dpsy...@mail.gmail.com ** All postings, unless explicitly stated otherwise, are the opinions of the author, and do not constitute legal or medical advice. This statement is added to the messages for those lawyers who are too stupid to see the obvious.
