The fact that the class is Products.Transience.Transience.Increaser makes me suspect that you're using sessions and within the same session you make too many read requests to the ZODB. When the load is too high, after a certain amount of attempts Zope will say, "piss off! ...for a while and come back later". So it comes back later and works fine. Are you using lots of AJAX requests? That can sometimes cause read conflict errors.
2009/8/28 Dragos Chirila <objectval...@gmail.com>: > Hello everyone, > > I have a question regarding a database read conflict error. I would > appreciate any thoughts on this issue. > > I am using Zope 188.8.131.52-final, Python 2.3.7 with a ZEO server and 4 > clients for 6 months now. I have noticed that the event.log is filled > with read conflict errors like the one below: > > 2009-08-28T10:29:26 INFO ZODB.Conflict database read conflict error > (oid 0x09, class Products.Transience.Transience.Increaser) at > /VirtualHostBase/http/metropotam.ro:80/metropotam/VirtualHostRoot/Opera/loc4769172835-Ateneul-Roman/ > (21 conflicts, of which 0 were unresolved, since startup at Thu Aug 27 > 15:25:02 2009) > > This URL of the object is > http://metropotam.ro/Opera/loc4769172835-Ateneul-Roman . We have > around 2000 objects of the same type and this is *the only one* that > generates read conflict errors. > > I have tried a few things: > > 1. Edit object and recatalog it > 2. Rename it > 3. Delete object, pack database, create a new object and then rename > it to keep the URL alive > 4. checked the data.fs and got no errors (fstest.py) > > None of the above solved the problem; I still get a lot of conflicts. > > Is there a way to fix this? I found it very strange that I get > conflicts only for this object and for no other of the same type, even > in the same folder... > > Thank you, > Dragos Chirila > _______________________________________________ > Zope maillist - z...@zope.org > https://mail.zope.org/mailman/listinfo/zope > ** No cross posts or HTML encoding! ** > (Related lists - > https://mail.zope.org/mailman/listinfo/zope-announce > https://mail.zope.org/mailman/listinfo/zope-dev ) > -- Peter Bengtsson, work www.fry-it.com home www.peterbe.com hobby www.issuetrackerproduct.com fun crosstips.org _______________________________________________ Zope maillist - Zope@zope.org https://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - https://mail.zope.org/mailman/listinfo/zope-announce https://mail.zope.org/mailman/listinfo/zope-dev )