[Zope] Zope is hanging repeatedly

[Chris McDonough]

Hi Doug,

It would be helpful to get the "debug log' output from Zope.  To make 
Zope write a debug log, start it in a shell that has the environment 
variable "STUPID_LOG_FILE=/path/to/debug.log".  Then when the site 
starts to become unresponsive, check the log.

The PCGI processes probably come as a result of Zope not being able to 
service any requests.  It is a symptom of the problem, and not the cause.

HTH,

- C

Granzow, Doug (NCI) wrote:
> I am having problems with a Zope installation hanging after running for
> several minutes or hours.  This started a couple of days ago after Zope had
> been running fine for the past few months.  Here are the details of the
> installation:
> 
> - Zope 2.3.1  (old, but what I'm stuck with for now)
> - Solaris 7
> - Apache 1.3.19 with several virtual hosts
> - the virtual hosts that connect to Zope are using mod_rewrite, some are
> like this:
> 
>   RewriteRule ^/(.*) /usr/local/apache/cgi-bin/Zope.cgi/$1
> [e=HTTP_CGI_AUTHORIZATION:%1,t=application/x-httpd-cgi,l] [PT]
> 
> ...while others are like this:
> 
>   RewriteRule ^/(.*) http://virtualhostname.com:8080/$1 [P]
> 
> (We are not using Virtual Host Monster -- just found out about that
> yesterday)
> 
> When Zope hangs I notice that there are a lot of Zope.cgi processes running
> on the system.  I am not sure, though, if Zope is hanging because of the
> Zope.cgi processes, or if the Zope.cgi processes are hanging because of Zope
> hanging.
> 
> One thing that concerns me is the size of our Data.fs file:
> 
> -rw-r--r--   1 zope     nobody   702930743 Mar  7 23:37 Data.fs
> 
> I know this needs to be packed, and I know the large size causes Zope to
> take a long time to start up.  I don't have reason to believe that it is
> causing Zope to hang, however.
> 
> When Zope hangs, the load average on the machine does not go up, Zope does
> not take excessive CPU.  It seems to be just sleeping, perhaps waiting for
> something external to happen.  The only solution I have found has been to
> restart it, which only helps temporarily.  We initially suspected search
> bots were hitting the site and overloading it (we were seeing connections
> from googlebot.com).  We configured Apache yesterday to reject those
> connections, but Zope still had problems last night.
> 
> Any suggestions or advice would be appreciated!
> 
> Thanks,
> Doug
> 
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-- 
Chris McDonough                    Zope Corporation
http://www.zope.org             http://www.zope.com
"Killing hundreds of birds with thousands of stones"