[Zope] Frequent ZOPE crashes

Tres Seaver tseaver at palladion.com
Sun Nov 29 15:57:53 EST 2009

Hash: SHA1

Andreas Krasa wrote:
> Am 25.11.09 17:37, schrieb Jaroslav Lukesh:
>> At first, try to eliminate error outside of the Zope itself. Try to
>> install it all into plain whole new (and reliable!) machine. Do not use
>> restore of any backups!
>> ----- Original Message ----- From: "Andreas Krasa"
>> <andreas.krasa at wu-wien.ac.at>
>>> A week ago we switched to a new layout (for corporate reasons) and now
>>> we're experiencing frequent crashes of the Zope servers. Fortunately
> Hi Jaroslav,
> we're right in the process of tracking down the error outside of ZOPE.
> We have completely installed a new server from scratch with RHEL 5.4 and 
> have re-installed python 2.4.6 and the latest versions of libxml2 and 
> libxslt there. We double checked the LD config, and made sure that te 
> correct shared objects get loaded (via lsof).
> We also reinstalled a few other modules that contain C-code (such as 
> python-ldap) which we need for being able to do authenitcation.
> Unfortunately that didn't really help much. We still experience crashes.
> Are there any known issues with Zope 2.11.2, LibXML2 and/or LibXSLT that 
> could cause these problems?
> The only thing we re-used is the Data.fs, which we have to, because 
> we're talking about a production system here.
> Also note, that we have used excatly the same setup for a long time now, 
> even on the same hardware, without any of these troubles. The problems 
> only started when we switched over to a new (and probably more 
> resource-intensive layout).
> We're unfortunately still not able to reproduce these crashes.

Can you set 'ulimit -c' to get a core file, which might at least help
point to the extension which is to blame (although it may just show the
"downstream" victim of a heap munge).

What versions of libxml2 / libxslt are you using?  How about lxml?

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Tres Seaver          +1 540-429-0999          tseaver at palladion.com
Palladion Software   "Excellence by Design"    http://palladion.com
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