[Zope] Re: Frequent Zope crashes (Zope 2.9.8)

[Tres Seaver]

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Paul Brettschneider wrote:
> Hello,
> 
> my Zope 2.9.8 instance crashes up to 6 times per hour.
> This is very unfortunate since the constant restarting
> brings performance to its knees.
> 
> It runs under Linux in 64 bit mode on an AMD64 .
> I managed to catch two backtraces with gdb
> (see end of the mail). Both backtraces show a crash
> in cc_oid_unreferenced(ccobject *self, PyObject *oid)
> in persistent/cPickleCache.c:
> Either in line 576: v = PyDict_GetItem(self->data,
> oid);
> or in line 607: Py_DECREF((ccobject
> *)((cPersistentObject *)v)->cache);
> 
> v and v->cache seem to point to heap:
> (gdb) print v
> $1 = (PyObject *) 0x5f8920
> (gdb) print ((cPersistentObject *)v)->cache
> $2 = (PerCache *) 0x613620
> 
> Always called from Per_dealloc(cPersistentObject
> *self) in persistent/cPersistence.c
> in line 578:
> cPersistenceCAPI->percachedel(self->cache, self->oid);
> 
> Is this a known issue?
> 
> Thank you for any help,

Can you reproduce using the following from-scratch build?

 $ cd /tmp
 $ wget http://www.zope.org/Products/Zope/2.9.8/Zope-2.9.8-final.tgz
 $ tar xzf Zope-2.9.8-final.tgz
 $ cd Zope-2.9.8-final
 $ ./configure --with-python=/path/to/64-bin-python \
               --prefix=/tmp/z298 && make && make install
 $ /tmp/z298/bin/mkzopeinstance.py -d /tmp/instance -u admin:123
 $ /tmp/instance/bin/zopectl fg



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