How are calling the ads, as I don't think you need these two calls in a normal ad display.
URL: /advert_chooser/manage_main URL: /site/advertisements/show_banner/manage_main Also: Try turning off "count views" and maybe "count clicks" and see if it does the same thing. It might be that Zope can't write to the ZODB that fast, although I run AdManager on about 10 sites in one Zope install that gets 20,000+ views (page) a day with no problems. Jake -- http://www.ZopeZone.com David said: > Hi > > Setup is: Zope 2.7.5, Python 2.3.5 (UNIX/gcc 2.95) (No ZEO, no CMF, no > Plone!) > > We are trying to use the AdManager ZClass, a great product doing > exactly what we needed. > > Testing this on the developer's machine, we had no problems. But having > now done a "small scale" stress testing (requesting about 20 pages per > second) on the server, some pages suddenly throw errors of the > following kind (see traceback below). The errors are not all 100% like > this one, but similar enough, I guess. The errors occur on a ratio of > about 1:4 (so 4 successful pages, then one error). [I know this is not > really scientific or would stand in a statistical analysis, but just to > give you an idea.] We could also not find any connection between the > errors and any of the 5 banners we're using for testing. (The product > rotates which banner is displayed.) > > -- from the traceback -- > ZODB.POSException.ReadConflictError > > Sorry, a site error occurred. > Traceback (innermost last): > > Module ZPublisher.Publish, line 175, in publish_module_standard > Module ZPublisher.Publish, line 149, in publish > Module ZPublisher.Publish, line 149, in publish > Module ZPublisher.Publish, line 149, in publish > Module ZPublisher.Publish, line 139, in publish > Module Zope.App.startup, line 163, in zpublisher_exception_hook > Module ZPublisher.Publish, line 101, in publish > Module ZPublisher.mapply, line 88, in mapply > Module ZPublisher.Publish, line 39, in call_object > Module OFS.DTMLMethod, line 144, in __call__ > Module DocumentTemplate.DT_String, line 474, in __call__ > Module DocumentTemplate.DT_Var, line 214, in render > Module OFS.DTMLMethod, line 137, in __call__ > Module DocumentTemplate.DT_String, line 474, in __call__ > Module DocumentTemplate.DT_Var, line 214, in render > Module OFS.DTMLMethod, line 137, in __call__ > <DTMLMethod instance at 91a9b90> > URL: /advert_chooser/manage_main > Physical Path:/advert_chooser > Module DocumentTemplate.DT_String, line 474, in __call__ > Module DocumentTemplate.DT_With, line 76, in render > Module OFS.DTMLMethod, line 137, in __call__ > <DTMLMethod instance at 9281cb0> > URL: /site/advertisements/show_banner/manage_main > Physical Path:/site/advertisements/show_banner > Module DocumentTemplate.DT_String, line 474, in __call__ > Module DocumentTemplate.DT_With, line 76, in render > Module DocumentTemplate.DT_In, line 703, in renderwob > Module DocumentTemplate.DT_Util, line 192, in eval > __traceback_info__: date_end > Module ZODB.Connection, line 599, in setstate > Module ZODB.Connection, line 628, in _is_invalidated > ReadConflictError: database read conflict error (oid 0x3244, class > *ilYYN6piu7CmJucspzx0gA==.AdBanner) > > -- end traceback -- > > Any idea what is happening here?? This is beyond my understanding of > Zope/ZODB and as it only happens occasionally, it does not seem to be a > straight bug. > Any suggestions on what I could try would be very welcomed. > (If you are using a Banner Ad Manager that is a proper product, not a > ZClass, that runs on a plain Zope, let me know.) > > Thanks in advance, > > DR > > _______________________________________________ > Zope maillist - Zope@zope.org > http://mail.zope.org/mailman/listinfo/zope > ** No cross posts or HTML encoding! ** > (Related lists - > http://mail.zope.org/mailman/listinfo/zope-announce > http://mail.zope.org/mailman/listinfo/zope-dev ) > _______________________________________________ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )