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From "Boyle Owen" <Owen.Bo...@six-group.com>
Subject RE: [users@httpd] proxy 502 problem uploading a large file
Date Wed, 25 Nov 2009 10:00:22 GMT
> -----Original Message-----
> From: Scott Chapman [mailto:schapman@mischko.com] 
> Sent: Wednesday, November 25, 2009 12:28 AM
> To: users@httpd.apache.org
> Subject: [users@httpd] proxy 502 problem uploading a large file
> 
> I have Apache 2.2.11 and a web server behind it (CherryPy).
> When I upload a large file to the CherryPy server, I see the file in
> /tmp/modrproxy.tmp.FOO
> It uploads completely.
> Then Apache returns a 502 error without ever hitting the backend (the
> first line of code in the handler is to spit out a log line saying it
> was reached).

502 is Bad Gateway, which means that apache and back-end had a protocol
problem. Probably the back-end didn't handle the upload correctly. What
do the back-end logs say?

You mention a "large" file without saying what that means 1 Mb? 1 Gb? 1
Tb? what happens with a "small" file (10 b, 1 kb, 10 kb...)?

Rgds,
Owen Boyle
Disclaimer: Any disclaimer attached to this message may be ignored. 

> 
> The access and error logs are below and my virtual host config.
> I can't think what else to try.  I was using RewriteRules for this.
> Same situation.
> 
> This is a production server and it's having problems.  Any 
> help would be
> greatly appreciated.
> 
> Scott
> 
> 
> access log
> <IPADDRESS> - - [24/Nov/2009:16:13:46 -0500] "POST
> /lertwfm/addFileToCase HTTP/1.1" 502 422
> 
> error log
> [Tue Nov 24 16:18:23 2009] [error] [client <IPADDRESS>] (70014)End of
> file found: proxy: error reading status line from remote server
> 127.0.0.1, referer:
> http://lertwfmdev.odc.vzwcorp.com/lertwfm/detail_edit_case?cas
e_id=6667
> [Tue Nov 24 16:18:23 2009] [error] [client <IPADDRESS>] proxy: Error
> reading from remote server returned by 
> /lertwfm/addFileToCase, referer:
> http://lertwfmdev.odc.vzwcorp.com/lertwfm/detail_edit_case?cas
e_id=6667
> 
> 
> <VirtualHost *>
>     DocumentRoot "/opt/webapp/wfm"
>     ServerName foo.bar.com
>     ErrorLog "|/usr/local/apache2/bin/rotatelogs
> /usr/local/apache2/logs/lert_wfm-error_log 86400"
>     CustomLog "|/usr/local/apache2/bin/rotatelogs
> /usr/local/apache2/logs/lert_wfm-access_log 86400" common
> 
>   <Location ~ "^/static/.*$">
>     FileETag None
> 
>     ExpiresActive On
>     ExpiresDefault "access plus 2 hours"
> 
>     Order allow,deny
>     allow from all
>     SetHandler default-handler
>   </Location>
> 
>   ProxyPass /static/ !
>   ProxyPass /lertwfm/static/js/ !
>   ProxyPass /fax/ http://127.0.0.1:9010/fax/
>   ProxyPass / http://127.0.0.1:9000/ connectiontimeout=900 timeout=900
> 
>   <Location ~ "^(?!/static/).*$">
>     Order allow,deny
>     allow from all
>   </Location>
> 
> </VirtualHost>
> 
> 
> 
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