Re: [ZODB-Dev] Wrong blob file being returned (similar to https://mail.zope.org/pipermail/zodb-dev/2011-February/014067.html )
On Wednesday 13 July 2011, you wrote: hmmm, interesting. Since we are using Amazon's Elastic LB to load balance these app. servers running of EC2 instances and we do not have any direct access to the ELB logs or systems, pining this problem on the ELB might be difficult (although AFIAK, the ELB setup also uses apache -- I could be mistaken though). If it isn't too much effort could you please point me to the apache bug you mentioned ? https://issues.apache.org/bugzilla/show_bug.cgi?id=46949 That is one I ran into before. There are some others like it but I did not immediately find them. The bug has been closed as fixed but people still seem to be having that problem. I found others besides myself that ran into that problem also on supposedly fixed versions and most just ending up going to nginx instead. ___ For more information about ZODB, see the ZODB Wiki: http://www.zope.org/Wikis/ZODB/ ZODB-Dev mailing list - ZODB-Dev@zope.org https://mail.zope.org/mailman/listinfo/zodb-dev
Re: [ZODB-Dev] Wrong blob file being returned (similar to https://mail.zope.org/pipermail/zodb-dev/2011-February/014067.html )
On Tuesday 12 July 2011, steve wrote: Hi, I have a setup where 4 ZEO clients running on separate machines connect to a single DB server which runs on a different system by itself. The ZEO clients and the DB server all are at version ZODB3-3.10.2. Now, since the last few weeks some of our users have been reporting that they occasionally see incorrect images being returned. One thing you may want to look at is the load balancer. Apache has a bug that keeps being opened and closed again for swapping data between requests under load. Because it happens at the apache level and not the zope level you will never see this problem in any of the zope logs. Just make sure you don't have a similar situation or you could end up debugging the wrong thing to a huge waste of time. In my case I spent a lot of time debugging zope and when I finally discovered it was apache that was screwing up I ended up just dumping apache for nginx. ___ For more information about ZODB, see the ZODB Wiki: http://www.zope.org/Wikis/ZODB/ ZODB-Dev mailing list - ZODB-Dev@zope.org https://mail.zope.org/mailman/listinfo/zodb-dev
