[Zope] Zope hangs from time to time

[Andy]

What does IPCheck actually do? To fully check a zope is working we normally
just run a perl or python script using LWP or urllib to get various pages.
As a further check we run this from a remote box. For me this is as close to
checking that DNS, db connections, Zope etc are all working that I can get.
The only way I can see a problem is if IPCheck does something wierd.

--
  Andy McKay

----- Original Message -----
From: <george.lively@ccpace.com>
To: <Zope@zope.org>
Sent: Tuesday, April 03, 2001 8:16 AM
Subject: [Zope] Zope hangs from time to time


> I have Zope 2.2.2 on Windows NT with ProxyPass to a Linux box where
> the Apache web server is.  We use the Zope Connector to connect to
> Interbase DB also sitting on NT.  From time to time (a few times a
> day), Zope hangs.  It doesn't die, but it will hang for a few minutes
> at which time no one can connect to the site.  Then after about 5-10
> minutes, it will restore itself, and everything will be ok.  If we try
> to connect directly to the Apache web server (running off 8080), we
> connect to Apache very quickly.  When we look at the NT box during
> this time of trouble, mem usage and cpu time look normal.
>
> But here's a twist that perhaps is interesting, perhaps not.  Could be
> a coincidence.  But anyhow, we have been running IPCheck for a little
> over a week - having that little application hit our server every 60
> seconds to see if it's still responding.  When the server does not
> respond, a little alarm goes off.  The log from ipcheck shows that
> some of the non-responsive times are at times when no one is hitting
> the server (except IPCheck).  When I've been around to catch the alarm
> recently, I've immediately logged into /manage on Zope.  Each time
> I've done this, Zope stops hanging.  And it stops hanging
> immediately. Any thoughts?  Is there anything I can do to ensure that
> I don't have to log into /manage to stop the hanging?
>
> Thanks.
>
>
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