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Article ID: 820448 - Last Review: May 30, 2003 - Revision: 1.3
PRB: CLB Clients May Be Slow to Respond After a COM+ Application Server Stops Responding
SYMPTOMS
After a COM+ application server stops responding, some Component Load Balancing (CLB) clients may not respond for about 40 seconds.
CAUSE
CLB detects a COM+ application server that is not responding when CLB polls for response times (by default, every 800milliseconds). If any COM+ component activation request comes in
after the server stops responding and
before the next CLB poll, the CLB routers continue to send object activation requests to the unresponsive server. The COM+ client thread waits until DCOM times out (by default, after about 40 seconds) before the object creation request is considered unsuccessful and the thread continues. Depending on the client program design, this may make the application appear to be unresponsive until DCOM times out.
RESOLUTION
To resolve this problem:
- Design your applications to handle user input on threads that are different from those threads that create remote COM+ objects.
- Try to create an object again after an unsuccessful attempt.
STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.
APPLIES TO
- Microsoft Application Center 2000 Standard Edition
- Microsoft Application Center 2000 Service Pack 2
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