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List:       apache-httpd-users
Subject:    RE: [users@httpd] mod_proxy issue - intermittent 502 response
From:       Haroon Rafique <haroon.rafique () utoronto ! ca>
Date:       2009-11-27 13:31:37
Message-ID: Pine.LNX.4.64.0911270829040.19693 () haroon ! sis ! utoronto ! ca
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On Today at 9:52am, CP=>Cristian Pini <cris.pini@fsite.com> wrote:

CP> Thx for taking the time to read the post.
CP> 

Hi,

Have you looked at "Protocol Adjustments" at:
http://httpd.apache.org/docs/2.2/mod/mod_proxy.html#envsettings
Those settings recently helped me get rid of intermittent 502 errors.

Hope that helps,

CP> 
CP> You're right in that it's difficult to determine whether Apache is the 
CP> problem, however, there's nothing sitting between the proxy and the 
CP> app server and the only things that are running on the app server are 
CP> apache (mod_perl) and sendmail.
CP> 
CP> Having reviewed the access and error log on the proxy I can see an 
CP> entry for a request that subsequently fails, however, neither the 
CP> access or error logs on the app server have an entry for the request. 
CP> This suggests that the request is never reaching the app server but as 
CP> there's only one hop between them I'm struggling to understand what is 
CP> happening to the request from the proxy.
CP> 
CP> Rgds,
CP> 
CP> Cris
CP> 

--
Haroon Rafique
<haroon.rafique@utoronto.ca>


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