[mapserver-users] Too many open files...

[Jim Klassen]

Are you running anything else significant on the machine?

It would generally be very difficult for MapServer, running in CGI mode, to use up all the open files.

The only cases I can think of that could be related to MapServer serving shapefiles would be (1) FastCGI and a bug that isn't closing files.  If this is the case, the issue should go away for awhile after you restart apache.  (2) if you have some sort of tileindex with a huge number of items in it or a tileindex that points back to itself.

Otherwise, I could see this if something else on the machine is using up all the file handles (globally or per user).

Another random thought... is there some interaction with SELinux (assuming you have SELinux enforcing)?

I think you said this behavior was new... if so, has anything changed on the machine lately?

Sorry I can't be more helpful.

Jim K

On Mar 28, 2011, at 4:45 PM, Lee Meilleur wrote:

> Fedora 12
> Apache 2.2.14
> Prefork MPM
> 
> ./shp2img: error while loading shared libraries: librx.so.0: cannot open shared object file: No such file or directory (this was news to me)
> 
> Serving shapefiles only.
> 
> MapServer version 5.6.3 OUTPUT=GIF OUTPUT=PNG OUTPUT=JPEG OUTPUT=WBMP OUTPUT=SVG SUPPORTS=PROJ SUPPORTS=AGG SUPPORTS=FREETYPE SUPPORTS=ICONV SUPPORTS=WMS_SERVER SUPPORTS=WMS_CLIENT SUPPORTS=WFS_SERVER SUPPORTS=WFS_CLIENT SUPPORTS=WCS_SERVER SUPPORTS=THREADS SUPPORTS=GEOS INPUT=EPPL7 INPUT=POSTGIS INPUT=OGR INPUT=GDAL INPUT=SHAPEFILE
> 
> Thanks
> 
> -----Original Message-----
> From: mapserver-users-bounces at lists.osgeo.org [mailto:mapserver-users-bounces at lists.osgeo.org] On Behalf Of Stephen Woodbridge
> Sent: Monday, March 28, 2011 4:29 PM
> To: mapserver-users at lists.osgeo.org
> Subject: Re: [mapserver-users] Too many open files...
> 
> On 3/28/2011 5:05 PM, Lee Meilleur wrote:
>> Hello,
>> 
>> Has anyone run into the error: "Too many open files: couldn't set 
>> child process attributes: /var/www/cgi-bin/mapserv"? This error shows 
>> up in an Apache error_log. A broken image now shows up for MapServer 
>> layers since this started. I've tried changing the ulimits or the 
>> MaxRequestsPerChild for Apache with no luck. Any other ideas?
> 
> You probably need to give us more information like:
> 
> Which OS?
> Which Apache version?
> Which Apache MPM module are you using?
> /var/www/cgi-bin/mapserv -v output?
> 
> Does this happen when you run shp2img?
> What are you serving via mapserver? vectors, imagery, database, etc?
> 
> -Steve W
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