On Jan 22, 2008, at 23:33 , Peter Bengtsson wrote:

On 22/01/2008, Dieter Maurer <[EMAIL PROTECTED]> wrote:
Peter Bengtsson wrote at 2008-1-22 15:23 +0000:
Perhaps I'm wrong but I suspect that a Zope I'm running is dying because
of running out of threads.

This is very unlikely. It may no longer respond when all its threads
are working -- but it will not die for this reason.

By dying I don't mean crashing and stopping but instead staying up and
running but not responding to anything. Like a coma.

This symptom, especially when these "hanging" threads cause no load at all on the system, certainly point to connections to outside systems that do not respond for some reason. I have seen this issue with Zope instances that make HTTP calls to other systems, or even with a hanging LDAP server which accepted connections from Zope but never returned. Any software that makes outgoing network connections from Zope is a potential suspect.

GDB can help you determine where the hanging condition originates. Here's some links:




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