[Erp5-dev] "requested resource does not exist" Error

[Jean-Paul Smets]

Bartek Gorny a écrit :
> We found it :) You'd never guess what it was. I'll describe it here
> for future reference.
>   
Great news.
> The reason was not in ERP5 - it was apache proxy, which had a timeout
> set to 10 seconds instead of the default 300 (I've no idea why). If a
> task took ERP5 more, apache returned an error. The tricky part was
> that "502 BadGateway", it said "404" and displayed a Zope's "resource
> not found" page. The reson for that was misconfiguration of
> mod_rewrite directives - mod_rewrite was rewriting everything, so when
> Apache wanted to display its HTTP_BAD_GATEWAY it tried to get it from
> Zope, which returned 404...
>
> The conclusion is that while setting up apache proxy, we should add
> RewriteCond so that some of the error pages are served locally, not
> rewritten. I'll set up a wiki page about it.
>   
Thanks. It is a good idea to add a wiki page on how to configure Apache 
proxy. It will also be the occasion for us to publish some doc on this 
(as soon as we / I review it).
> Bartek
>
>
> 2009/2/17 Rafael Monnerat <rafael at nexedi.com>:
>   
>> Hi,
>>
>> Some months ago one student that I was starting to help had some similar
>> problems because he installed by mistake 2 ERP5 sites using the same
>> MYSQL database (test test) and this is totally wrong.
>>
>> One reference related to it:
>>
>> - http://www.erp5.org/HowToCreateMultipleERP5Sites
>>
>> Regards,
>>
>> Jean-Paul Smets wrote:
>>     
>>> Jacek Medrzycki a écrit :
>>>
>>>       
>>>> Hello everybody.
>>>>
>>>> We often encounter following error:
>>>>
>>>>
>>>>         
>>> Could you describe precisely "we" (ie. situation, application, number of
>>> users, etc.)
>>>
>>>       
>>>> Resource not found
>>>> Sorry, the requested resource does not exist.
>>>>
>>>>
>>>>         
>>> I did not see such an error for ages, even on the largest sites Nexedi
>>> has implemented, with 300+ users and 10,000,000+documents.
>>>
>>> Very long ago (many years), I saw this kind of error in relation with
>>>     - Zope sessions
>>>     - caching objects into RAM (coding crime)
>>>     - misuse of volatile attributes
>>>     - creating 2 ERP5 instances on the same Zope (forbidden)
>>>
>>>       
>>>> while accessing an object or module. The object or module of course
>>>> EXISTS, and sometimes page reloading solves the problem for a while -
>>>> however sometimes error repeats very frequently.
>>>> It seems that zope restarting or database packing helps for some time
>>>> but i'm not sure - it can be just a coincidence.
>>>>
>>>>
>>>>         
>>> It is not a solution to restart or pack.
>>>
>>>       
>>>> There is nothing in zope log (except "resource not found" message itself).
>>>>
>>>> It's common on rather old erp5 site, but also appeared few times on
>>>> fresh new ERP5 installation, and this new installation wasn't used very
>>>> hard (test only). However, both sites are on the same machine.
>>>>
>>>> What this error can be related to? Can anybody had similar problems?
>>>>
>>>>
>>>>
>>>>         
>>> I do not see such error on any of our client sites. I suppose that this
>>> error is related to some customisations you made or to the use of
>>> incompatible libraries / versions of python / zope.
>>>
>>>       
>>>> The machine has 2Gs of memory. Can this be a problem?
>>>>
>>>>
>>>>
>>>>         
>>> No.
>>>
>>>       
>>>> Regards and TIA
>>>> J.
>>>> _______________________________________________
>>>> Erp5-dev mailing list
>>>> Erp5-dev at erp5.org
>>>> http://mail.nexedi.com/mailman/listinfo/erp5-dev
>>>>
>>>>
>>>>         
>>>
>>>       
>> --
>> Rafael Manhães Monnerat, Nexedi Developer - Tel. +55 (22) 8808 8500
>> ERP5 Enterprise: Free / Open Source ERP for Critical Applications
>> http://www.erp5.com
>> ERP5 Express: Hosted Open Source ERP for small companies
>> http://www.myerp5.com
>> Nexedi: Consulting and Development of Free / Open Source Software
>> http://www.nexedi.com
>>
>> _______________________________________________
>> Erp5-dev mailing list
>> Erp5-dev at erp5.org
>> http://mail.nexedi.com/mailman/listinfo/erp5-dev
>>
>>     
>
>
>
>   


-- 
Jean-Paul Smets-Solanes, Nexedi CEO - Tel. +33(0)6 62 05 76 14
ERP5 Enterprise: Free / Open Source ERP for Critical Applications
http://www.erp5.com
ERP5 Express: Hosted Open Source ERP for small companies
http://www.myerp5.com
Nexedi: Consulting and Development of Free / Open Source Software 
http://www.nexedi.com