[Zope] Problem with AdManager

[Jake]

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
>
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