Thread suddenly stops in NT Service

[Peter Hansen]

Matt Rapoport wrote:
> 
> I'm running an NT service with a thread.  The thread performs a
> calculation every so often and appends the number to a text file.
> Every so often the thread just stops - or so it seems.  The text file
> stops getting numbers added to it but the service is still running and
> no errors have been thrown.  I'm quite sure that the code would catch
> an error and post it to the event viewer if one were arising.
> 
> The only other relevant points I can think of are that the thread runs
> a while 1: loop and is set to run as a Daemon.  The service waits only
> for the stop command.  It doesn't seem to be operating system specific
> (happens on both XP and 2000).  It doesn't seem to be file size
> specific, it stops at various file sizes ranging from 5K - 50K.  It
> doesn't seem to be time specific - sometimes it'll stop after about a
> day.  Sometimes it'll stop after two days.

Is there any evidence to counter the theory that the thread is 
simply throwing an exception, terminating, and the main thread is 
continuing to run, unaware of the problem?

-Peter