MultiThread Socket on NT

Cliff Wells logiplexsoftware at
Sat Nov 17 01:08:37 CET 2001

On Friday 16 November 2001 14:26, David Bolen wrote:
> Cliff Wells <logiplexsoftware at> writes:
> > Be sure you are using at least SP5.  NT 4 had serious threading issues
> > prior to that.
> Do you have any pointers or references to what the problem was?  I've
> been using multi-threaded applications (although not a high density
> connection server) under NT4 SP4 without any observable problems.

It's been around three or four years since I encountered that, so the 
details are pretty vague now.... I was writing an instant messaging server 
that spawned a thread for every incoming connection (not the best way, but 
it was my first attempt at network programming, multithreading and my 
first Python program to boot =).  I was stress-testing my server and I had 
an adjustable parameter limiting the number of threads allowed at any one 
time.  If I set this higher than, say 20 (highly questionable if that's 
the number), NT would flake out (I think to the point of BSOD, but I can't 
recall).  Anyway, without changing any code, applying SP5 fixed it, and I 
seem to recall that threading was one of the issues addressed in SP5.

Cliff Wells
Software Engineer
Logiplex Corporation (
(503) 978-6726 x308
(800) 735-0555 x308

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