Bug report #11206: QGIS Server crashes on GetLegendGraphic and GetFeatureInfo requests with master - QGIS Application - QGIS Issue Tracking

Bug report #11206

QGIS Server crashes on GetLegendGraphic and GetFeatureInfo requests with master

Added by Nicolas Boisteault about 10 years ago. Updated over 9 years ago.

Status:	Closed
Priority:	High
Assignee:	-
Category:	QGIS Server
Affected QGIS version:	master	Regression?:	No
Operating System:		Easy fix?:	No
Pull Request or Patch supplied:	No	Resolution:	fixed/implemented
Crashes QGIS or corrupts data:	Yes	Copied to github as #:	19516

Description

When I send GetLegendGraphic or GetFeatureInfo requests I get a 500 internal server error.
Here is my error_log for apache2 :

[Mon Sep 15 12:35:44 2014] [warn] [client IP] mod_fcgid: error reading data, FastCGI server closed connection
[Mon Sep 15 12:35:44 2014] [error] [client IP] Premature end of script headers: qgis_mapserv.fcgi
[Mon Sep 15 12:35:47 2014] [error] mod_fcgid: process /usr/lib/cgi-bin/qgis_mapserv.fcgi(23117) exit(communication error), get unexpected signal 11
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.
/usr/lib/cgi-bin/qgis_mapserv.fcgi: symbol lookup error: /usr/lib/cgi-bin/qgis_mapserv.fcgi: undefined symbol: _ZN11QgsSymbolV215drawPreviewIconEP8QPainter5QSize

The issue doesn't exist in QGIS 2.4

History

#1 Updated by Giovanni Manghi about 10 years ago

Priority changed from High to Severe/Regression

confirmed here on Ubuntu 14.04 and qgis master.

#2 Updated by Martin Dobias about 10 years ago

Status changed from Open to Feedback
Priority changed from Severe/Regression to High

Are you sure that you do not have some mix-up with QGIS libraries on your system? (e.g. server fcgi picking up wrong version of qgis_core library?)

The drawPreviewIcon method requested by server binary has been changed recently (in API compatible way), but it should work fine if you recompile the server binary fcgi.

#3 Updated by Simon Bowyer almost 10 years ago

Similar problem here, with qgis-server 2.6.1.1 on Ubuntu Server 14.04.1 LTS, a clean install. When a GetLegendRequest references a map like this it works:
?map=/usr/lib/cgi-bin/testmap/testmap.qgs

And when formed like this it fails with 'Internal Server Error' and the above-mentioned 'Unable to find driver' warnings in the apache2 log:
?map=testmap.qgs