[Zope] zope process goes to sleep
Fri, 14 Mar 2003 22:21:20 +0100
AM wrote at 2003-3-13 11:23 -0800:
> We have Zope 2.6.1 (upgraded) running behind Apache 2.0 on a Redhat 8
> dual processor machine with Py 2.1.3. Its been live for quite a few days.
> Now every night at around 3-5 AM the server sort of stops responding. A
> ps -ax still shows the process running, and a ping to port 8080 on the
> machine returns a valid response, just that the server doesnt respond
> and Apache returns a proxy error.
> Any ideas as to what might be causing that? Has anybody seen that before?/
We have a similar effect:
Zope suddenly stops and sometimes even a SIGTERM is unable
to kill it (requires SIGKILL).
I was once able to provoke this behaviour by pressing
the "minimize" button in "Control_Panel --> Database Management
--> Flush Cache".
Therefore, I expect the problem to be a deadlock somehow
related to invalidation (something requiring two looks
acquired in different order at different places).
I did not yet seriously analyse the problem.