[MapProxy] GetCapabilities request produces read data timeout in 40seconds

[Rahkonen Jukka]

Hi,

It is a good habit to do WMS GetCapabilities with all the parameters, in your case 
http://<productionserver>/mapproxy/service?SERVICE=WMS&VERSION=1.1.1&REQUEST=GetCapabilities

Probably your request is not the reason for your troubles but if you test various servers you can never know for sure what they deside to do with the missing parameters. According to the standard in GetCapabilities request SERVICE is compulsory while VERSION is not (the server must then use the highest version it supports). 

-Jukka Rahkonen-

Christian Willmes wrote:

> Hi,
> 
> I'm having a problem with the GetCapabilities request from our
> production MapProxy instance.
> When I try to access the GetCapabilities from
> http://<productionserver>/mapproxy/service?REQUEST=GetCapabilities
> 
> I get an Internal Server Error 500 from Apache (MapProxy is 
> running via
> Apache2 with mod_fcgid).
> 
> And the following appaers in the error logs:
> 
> 2011-04-27 10:24:14,706 - INFO -
> 1466:mapproxy.config.loader:load_configuration - Reading services
> configuration: /var/local/mapproxy/etc/mapproxy.yaml
> 2011-04-27 10:24:14,773 - WARNING - 
> 1466:mapproxy.config.loader:__init__
> - unexpected key grid
> 2011-04-27 10:24:14,774 - WARNING - 
> 1466:mapproxy.config.loader:__init__
> - unexpected key grid
> 2011-04-27 10:24:14,774 - WARNING - 
> 1466:mapproxy.config.loader:__init__
> - unexpected key grid
> [Wed Apr 27 10:24:54 2011] [warn] mod_fcgid: read data 
> timeout in 40 seconds
> [Wed Apr 27 10:24:54 2011] [error] [client 134.95.150.136] 
> Premature end
> of script headers: mapproxy.fcgi, referer:
> http://<productionserver>/mapproxy/demo/
> [Wed Apr 27 10:25:05 2011] [warn] mod_fcgid: process 1466 
> graceful kill
> fail, sending SIGKILL
> [Wed Apr 27 10:25:11 2011] [notice] mod_fcgid: process
> /var/local/mapproxy/etc/mapproxy.fcgi(1466) exit(communication error),
> get stop signal 9
> 
> 
> I think the critical line is the "read data timeout"? The funny thing
> is, on my test virtual machine with the same configuration and setup
> (also with Apache+mod_fcgid) this is working, no errors are logged.
> The key grid warnigs are also appearing on the test environment for
> normal tile requests (but not on the GetCapabilities request, for the
> GetCapabilities Request there are no logs at all on the
> testenvironment), so I don't think key grid issue is causing the
> GetCapabilities issue?
> Can it be some access rights? At least this is what could be different
> on the production setup from the testenvironment...
> 
> Thanks very much and regards,
> Christian
> 
> 
> -- 
> Christian Willmes
> AG GIS & Fernerkundung      | GIS & RS Group
> Geographisches Institut     | Institute of Geography
> Universität zu Köln         | University of Cologne
> Tel.: +49 (0)221 470 6234
> Fax.: +49 (0)221 470 2280
> http://www.geographie.uni-koeln.de/gis
> http://www.sfb806.de
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