[Qgis-user] QGIS-Server write log on stdoutput ?

[Larry Shaffer]

Hi Andrea,

I suggest posting this to the dev list and asking Marco Hugentobler for
assistance. I personally do not know enough about threading on Linux to
help with that issue. Sorry.

You could also create an issue ticket and assign to Marco, though posting
to the dev list should probably be the first step.

On a side note: is the log file populated with output when running the
server with the OK project file?

Regards,

Larry Shaffer
Dakota Cartography
Black Hills, South Dakota


On Sat, Jun 21, 2014 at 1:36 PM, Andrea Peri <aperi2007 at gmail.com> wrote:

> Hi, Larry.
>
> Thx for hint.
>
> I set the two variables and the log file is create.
> :)
>
> But unfortunately it is absolutely empty.
> :(
>
> It seem the qgis-server will crash quite istantaneously.
>
> As I report before , I Guess this is something due to the qgis project
> because another project will work without any problem.
>
> So I set a local environment and run the qgis-server from a shell with
> a gdb debug to see effectively what it send to stdout.
>
> This is what it report:
>
> ...................
> [Thread debugging using libthread_db enabled]
> Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
> Warning 1: Unable to find driver ECW to unload from GDAL_SKIP
> environment variable.
> Warning 1: Unable to find driver ECW to unload from GDAL_SKIP
> environment variable.
> Warning 1: Unable to find driver JP2ECW to unload from GDAL_SKIP
> environment variable.
> Warning 1: Unable to find driver ECW to unload from GDAL_SKIP
> environment variable.
> Warning 1: Unable to find driver JP2ECW to unload from GDAL_SKIP
> environment variable.
> [New Thread 0x7fffe307c700 (LWP 823)]
> [New Thread 0x7fffe27ea700 (LWP 824)]
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x00007ffff0e50421 in __dynamic_cast ()
>    from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
> (gdb)
> ..................
>
> I see the version my linux run is the
>         libstdc++.so.6 (libc6,x86-64) =>
> /usr/lib/x86_64-linux-gnu/libstdc++.so.6
>
> There is some know issue of qgis-server with the libstdc++.so.6
> ?
>
> 2014-06-21 20:53 GMT+02:00 Larry Shaffer <larrys at dakotacarto.com>:
> > Hi Andrea,
> >
> > You can set the QGIS_LOG_FILE environment variable to have the
> > qgis_mapserv.fcgi process log to a file. It needs to be set within the
> > server process environment (if it has a loadable FCGI module) or within
> the
> > FCGI-spawning process environment, e.g. uWSGI or spawn-fcgi.
> >
> > For Apache:
> >
> > <IfModule mod_fastcgi.c>  (or mod_fcgid.c)
> >   ...
> >   SetEnv QGIS_LOG_FILE /path/to/qgis_server.log
> > </IfModule>
> >
> > Of course, the log needs to be writable by your Apache or FCGI-spawning
> > process user.
> >
> > NOTE: if using latest master builds (or upcoming 2.4 release), the env
> var
> > is now QGIS_SERVER_LOG_FILE, with the new env var QGIS_SERVER_LOG_LEVEL
> to
> > define verbose level [0,1].
> >
> > I haven't tested this, but the amount of debug output is usually
> relative to
> > the CMake build type, e.g. Release vs. RelWithDebInfo or Debug, like is
> the
> > case for the QGIS desktop output. Pretty sure that is always a
> compile-time
> > choice, and can't be be overridden at run-time. Your qgis_mapserv.fcgi
> > binary may need to be (re)built as RelWithDebInfo or Debug to trigger
> enough
> > output to debug your issue.
> >
> > [0]
> >
> https://github.com/qgis/QGIS/commit/29c39b9f0209ddedd0d51eda1dc926e6e0f2ea9e
> > [1]
> >
> https://github.com/qgis/QGIS/commit/bdf1ac8d46d89869e58884c5f55ff711a1f5f76d
> >
> > Regards,
> >
> > Larry Shaffer
> > Dakota Cartography
> > Black Hills, South Dakota
> >
> >
> > On Sat, Jun 21, 2014 at 9:25 AM, Andrea Peri <aperi2007 at gmail.com>
> wrote:
> >>
> >> Hi,
> >>
> >> Our qgis-server is crashing on a project .
> >> This is quite strange because on the same project on a qi-desktop (on
> >> another machine) it run without any problem.
> >> And also the qgis-server run without any problem with another different
> >> project.
> >>
> >> I try to read from the log of server web to see any useful information
> >> but the log none report of qgis.
> >> The web server ,og come from the stdout so perhaps there is some
> >> specific setting to say to QS to output to stdout log ?
> >>
> >> Thx,
> >>
> >>
> >> --
> >> -----------------
> >> Andrea Peri
> >> . . . . . . . . .
> >> qwerty àèìòù
> >> -----------------
> >> _______________________________________________
> >> Qgis-user mailing list
> >> Qgis-user at lists.osgeo.org
> >> http://lists.osgeo.org/mailman/listinfo/qgis-user
> >
> >
>
>
>
> --
> -----------------
> Andrea Peri
> . . . . . . . . .
> qwerty àèìòù
> -----------------
>
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