Zope 2.9.0
Python 2.4.2
Amd dual Opteron

I am seeing occasional (several per day)  Zope crashes under load.  The 
event.log immediately before and after the crash looks like:

2006-02-06T14:07:20 INFO ZPublisher.Conflict ConflictError at 
<some path>: 
database conflict error (oid 0x086e, class BTrees._OOBTree.OOBTree, serial 
this txn started with 0x03633ca95f75e900 2006-02-06 22:01:22.373575, 
serial currently committed 0x03633caf59114244 2006-02-06 22:07:20.875176) 
(463 conflicts (0 unresolved) since startup at Mon Feb  6 08:21:26 2006)
2006-02-06T14:09:09 INFO ZServer HTTP server started at Mon Feb  6 
14:09:09 2006
        Hostname: x-harper
        Port: 8081

which also triggers a connection drop and restarBt of ZEO.

The failure happens silently even with 

  level ALL
    path $INSTANCE/log/event.log
    level info

When this happens zope is running under zopectl and zeo isi running under

What sort of Zope failure can cause this sort of behavior?  What's the 
best approach to get more information to localize the failure.

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