Hi Rob,
Next I would remove the ECW support/reliance and try to trigger the
error without ECW data (yes with a local mapfile called from shp2img).
Maybe others have ideas.
-jeff
--
Jeff McKenna
MapServer Consulting and Training Services
co-founder of FOSS4G
http://gatewaygeo.com/
On 2020-10-12 2:11 p.m., Rob Marjot wrote:
Hi Jeff, all,
Thank you for your thoughts on this. Can you elaborate on the PROJ<6
remark; serious performance hits?
Indeed, I am on the NG (SWIG) MapScript. Trying with shp2img and mapserv
-nh will require to have the equivalent .map file on disk; I will work
on that soon.
Taking a complete different approach, I have been able to reproduce the
same problem by:
1. Installing *binaries* for MapServer 7.6.1, GDAL 3.1.3 and PROJ 7.1.1
from UbuntuGIS Unstable
2. Add ECW support through compiling the simple GDAL-plugin (tested:
gdal_translate from ECW to GTiff works brilliantly)
3. Configured this to run in the context of 7.4 PHP-FPM
Again the seg fault. Connecting to PHP-FPM from either Apache or NGINX
does not make a difference, but that's no surprise.
Rob
Op ma 12 okt. 2020 om 15:38 schreef Jeff McKenna
<[email protected] <mailto:[email protected]>>:
Hi Rob,
I'm not sure what is happening in your case, but make sure that you are
using the recommended PHP SWIG MapScript in your build
(-DWITH_PHPNG=1),
as the old PHP MapScript is unmaintained.
Some other thoughts:
- can you trigger this with shp2img at the commandline? (this will
remove MapScript/Apache/WMS from the equation)
https://mapserver.org/utilities/shp2img.html
- also, try your GetMap request at the commandline with:
mapserv -nh
"QUERY_STRING=map=/ms4w/apps/local-demo/local-demo.map&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&..."
> ttt.png
But if I can speak openly here, I believe most production instances are
still running PROJ<6, so everyone is beginning to experiment with
settings of FCGI/PHP-FPM for GDAL3+PROJ7 (as there is a noticeable
performance hit with the new PROJ).
In other words, keep us posted here on your testing and configuration;
also, do consider documenting your configuration and workaround on the
MapServer wiki, so others can follow:
https://github.com/MapServer/MapServer/wiki
Thanks Rob!
-jeff
--
Jeff McKenna
MapServer Consulting and Training Services
co-founder of FOSS4G
http://gatewaygeo.com/
On 2020-10-09 9:44 p.m., Rob Marjot wrote:
> Hi All,
>
> I am running latest MapServer 7.6.1 compiled from source on
Ubuntu 20.04
> with (also from source):
> - proj-7.1.0
> - gdal-3.1.2
>
> Using the ppa:ondrej/php repo, I installed the following PHP
packages:
> php7.4 php7.4-fpm php7.4-dev
> Apache/2.4.41 proxies into the FPM over unix socket
>
> Compiling MapServer went smoothly and through the configuration
of the
> extension in PHP, MapScript is available. When I call (HTTP GET)
my PHP
> script to handle a WMS-formatted request [ OWSDispatch() ], the
first 2
> requests are handled fine (returns a rendered map image), but the
next
> two make the PHP-FPM crash:
> /var/log/syslog:
> Oct 10 01:59:25 as02 kernel: [3663532.034251] php-fpm7.4[1260175]:
> segfault at 28 ip 00007fbce21fb3eb sp 00007ffe87f600e0 error 6 in
> libgdal.so.27.0.2[7fbce152e000+d50000]
> Oct 10 01:59:25 as02 kernel: [3663532.034262] Code: 8b 15 81 de
56 00 e9
> 24 2d 38 ff 0f 1f 40 00 f3 0f 1e fa 41 54 49 89 f4 55 48 89 d5 53
89 fb
> 48 89 cf e8 e8 f0 ff ff 48 63 fb <4c> 89 24 f8 48 89 ac f8 00 01
00 00
> 5b 5d 41 5c c3 0f 1f 40 00 f3
>
> What could be the problem? Any help is much appreciated.
>
> Best,
> Rob Marjot
>
>
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