Bug report #17087: WFS provider deadlock (freezes forever waiting for mMutex to unlock) - QGIS Application - QGIS Issue Tracking

Bug report #17087

WFS provider deadlock (freezes forever waiting for mMutex to unlock)

Added by Alessandro Pasotti over 6 years ago. Updated over 6 years ago.

Status:	Closed
Priority:	High
Assignee:	Even Rouault
Category:	Web Services clients/WFS
Affected QGIS version:	master	Regression?:	No
Operating System:		Easy fix?:	No
Pull Request or Patch supplied:	No	Resolution:
Crashes QGIS or corrupts data:	Yes	Copied to github as #:	24986

Description

Steps to reproduce:

- a WFS endpoint is needed (tested with both geoserver and qgis server with same results)
- connect to the WFS server and load a layer in QGIS
- from the python cosole get the publicSource of the layer , for example with iface.currentLayer().publicSource() (in the example below it is 'restrictToRequestBBOX=\'1\' srsname=\'EPSG:4326\' typename=\'world\' url=\'http://localhost:8081/cgi-bin/qgis_mapserv.fcgi?MAP=/web/projects/helloworld.qgs\' version=\'auto\' table="" sql='
- from the python console inside QGIS (change the source to your valid WFS public source)

vl = QgsVectorLayer('restrictToRequestBBOX=\'1\' srsname=\'EPSG:4326\' typename=\'world\' url=\'http://localhost:8081/cgi-bin/qgis_mapserv.fcgi?MAP=/web/projects/helloworld.qgs\' version=\'auto\' table="" sql=', 'mywfs', 'WFS'); QgsProject.instance().addMapLayers([vl]) and [f for f in vl.dataProvider().getFeatures()]

Expected behavior:
- QGIS loads the layer in the canvas

Actual behavior:
- QGIS freezes forever

stacktrace.txt - Full stacktrace (80.5 KB) Alessandro Pasotti, 2017-08-29 03:57 PM

Related issues

Associated revisions

Revision e5b11d42
Added by Alessandro Pasotti over 6 years ago

Merge pull request #5085 from boundlessgeo/wfs_mutex_offline

Offline editing: workaround for bug 17087 deadlock

Revision 75c41f5e
Added by Even Rouault over 6 years ago

[WFS provider] Fix deadlock when adding WFS layer to project from Python console (fixes #17087)

Revision 505e3659
Added by Even Rouault over 6 years ago

[WFS provider] Fix deadlock when adding WFS layer to project from Python console (fixes #17087)

History

#1 Updated by Alessandro Pasotti over 6 years ago

Regression? changed from Yes to No

It also affects 2.18

vl = iface.addVectorLayer('user=\'admin\' restrictToRequestBBOX=\'1\' srsname=\'EPSG:4326\' typename=\'opengeo:countries\' url=\'http://localhost:8080/geoserver/wfs\' version=\'auto\' table="" sql=', 'mywfs', 'WFS'); [f for f in vl.dataProvider().getFeatures()]