[ZODB-Dev] Debugging ReadConflictErrors on ZODB 3.4 (Zope 2.8)

[Florent Guillaume]

This is a ZODB 3.4 version of the patch I previously posted last June:
http://mail.zope.org/pipermail/zodb-dev/2005-June/008907.html

The following patch may be helpful to some of you for debugging. It
collects in memory information about objects when they are loaded
from the ZODB, so that when a ReadConflictError is raised, you can
not only display the oid but also the chain of objects (and their id)
that lead to it, in effect giving you its path.

There's a "log" that you can uncomment to see all objects loaded.

Works on ZODB 2.6 too IIRC. Or the changes are trivial.

Feedback welcome.
Some people have reported infinite loops starting zopectl debug, but  
I haven't had time to dig.

Florent

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-- 
Florent Guillaume, Nuxeo (Paris, France)   Director of R&D
+33 1 40 33 71 59   http://nuxeo.com   fg at nuxeo.com