[QGIS-Developer] Need help troubleshooting Browser Panel freezing QGIS

i-s-o 46.i.s.o.64 at gmail.com
Thu Oct 8 19:45:23 PDT 2020 

The Browser Panel hasn't worked for me for at least the past couple of
years (I'm on Windows 10). My best guess: this is related to my computer
being part of a Windows Domain. Seeing that DB Manager may be discontinued,
and several of its functionalities are being moved to the Browser Panel, I
tried to figure out what is wrong with it.

The problem manifests itself when I disconnect my laptop from the company
network: if the Browser Panel is enabled, QGIS would freeze 20-40 seconds
every minute or so during active use. I am pretty sure this is not limited
to my computer: I provide training to other staff, and they all have the
same problem (both OSGeo4W-advanced and standalone installations).

Note that the problem disappears if I remotely connect to my company's
network via VPN: it looks like QGIS Browser Panel (or Qt) is periodically
trying to query some resource(s) on the company's network, and gives up
after some time.

I ran QGIS with debug options, but I didn't see a clear pattern pointing to
the source of the problem. Any suggestions about what to do next to figure
out what's going on?

Here is a redacted log around the freeze episodes:

..\..\..\src\app\main.cpp(510) : (main) [0ms] Starting qgis main
..\..\..\src\core\qgsapplication.cpp(172) :
(QgsApplication::QgsApplication) [32ms] loading of qgis translation failed
C:/tools/OSGeo4W64/apps/qgis-dev/./i18n//qgis_en_US
..\..\..\src\core\qgsapplication.cpp(187) :
(QgsApplication::QgsApplication) [0ms] loading of qt translation failed
C:/tools/OSGeo4W64/apps/Qt5/translations/qt_en_US
..\..\..\src\core\qgsmessagelog.cpp(29) : (QgsMessageLog::logMessage)
[488ms] 2020-10-01T11:31:52 [1] Successfully loaded globalsettingsfile
path: C:/tools/OSGeo4W64/apps/qgis-dev/./resources/qgis_global_settings.ini
..\..\..\src\app\main.cpp(1080) : (main) [2ms] User profile details:
... skip
line 645
..\..\..\src\gui\qgsmaptool.cpp(90) : (QgsMapTool::activate) [0ms] Cursor
has been set
..\..\..\src\gui\qgsmapcanvas.cpp(529) : (QgsMapCanvas::refresh) [16ms]
CANVAS refresh - invalid settings -> nothing to do
..\..\..\src\core\qgsdataitem.cpp(391) : (QgsDataItem::populate) [10543ms]
mPath = favorites:
..\..\..\src\core\qgsdataitem.cpp(463) : (QgsDataItem::populate) [0ms]
mPath = favorites:
... skip
line 743
..\..\..\src\core\qgsbrowsermodel.cpp(783) :
(QgsBrowserModel::addProviderRootItem) [0ms] Add new top level item :
Spatial Bookmarks
..\..\..\src\gui\qgsbrowsertreeview.cpp(73) :
(QgsBrowserTreeView::restoreState) [1ms] mExpandPaths = favorites:
..\..\..\src\core\qgsbrowsermodel.cpp(406) : (QgsBrowserModel::findPath)
[0ms] Arrived favorites:
..\..\..\src\core\qgsbrowsermodel.cpp(579) :
(QgsBrowserModel::itemDataChanged) [11946ms] Entered
..\..\..\src\core\qgsbrowsermodel.cpp(579) :
(QgsBrowserModel::itemDataChanged) [340ms] Entered
... skip
line 14860
..\..\..\src\providers\wms\qgswmsprovider.cpp(247) :
(QgsWmsProvider::~QgsWmsProvider) [0ms] deconstructing.
..\..\..\src\core\qgsmaprenderersequentialjob.cpp(131) :
(QgsMapRendererSequentialJob::internalFinished) [0ms] SEQUENTIAL finished
..\..\..\src\core\qgsmaprenderersequentialjob.cpp(37) :
(QgsMapRendererSequentialJob::~QgsMapRendererSequentialJob) [0ms]
SEQUENTIAL destruct
..\..\..\src\core\qgsmaprenderercustompainterjob.cpp(73) :
(QgsMapRendererCustomPainterJob::~QgsMapRendererCustomPainterJob) [0ms]
QPAINTER destruct
..\..\..\src\core\qgsmaplayer.cpp(165) : (QgsMapLayer::name) [32572ms]
returning name 'OpenStreetMap'
..\..\..\src\core\qgsmaplayer.cpp(165) : (QgsMapLayer::name) [193ms]
returning name 'OpenStreetMap'
..\..\..\src\core\qgsvectorlayer.cpp(1769) :
(QgsVectorLayer::setDataProvider) [32020ms] Instantiated the data provider
plugin
..\..\..\src\core\qgsdatasourceuri.cpp(213) :
(QgsDataSourceUri::QgsDataSourceUri) [0ms] parameter
"Point?crs":"EPSG:4326&field=time:datetime(0,0)&uid={f2264946-651d-4539-aecc-e474431c88c9}"
added
... skip
line 14973
..\..\..\src\core\qgsmaplayer.cpp(165) : (QgsMapLayer::name) [1ms]
returning name 'temporal-test-ML'
..\..\..\src\core\qgsmaplayer.cpp(165) : (QgsMapLayer::name) [1ms]
returning name 'temporal-test-ML'
..\..\..\src\core\qgsmaplayer.cpp(165) : (QgsMapLayer::name) [21210ms]
returning name 'temporal-test-ML'
..\..\..\src\gui\qgsmapcanvas.cpp(557) : (QgsMapCanvas::refreshMap) [33ms]
CANVAS refresh!
... skip
line 48764
..\..\..\src\core\qgsmaplayer.cpp(165) : (QgsMapLayer::name) [0ms]
returning name 'OpenStreetMap'
..\..\..\src\core\qgsmaplayer.cpp(165) : (QgsMapLayer::name) [24ms]
returning name 'temporal-test-ML'
..\..\..\src\core\qgsmaplayer.cpp(165) : (QgsMapLayer::name) [28438ms]
returning name 'temporal-test-ML'
..\..\..\src\core\qgsmaplayer.cpp(165) : (QgsMapLayer::name) [4ms]
returning name 'temporal-test-ML'
... skip
line 51945
..\..\..\src\core\qgsmaplayer.cpp(165) : (QgsMapLayer::name) [0ms]
returning name 'OpenStreetMap'
..\..\..\src\core\qgsmaplayer.cpp(165) : (QgsMapLayer::name) [16ms]
returning name 'temporal-test-ML'
..\..\..\src\gui\attributetable\qgsattributetablemodel.cpp(84) :
(QgsAttributeTableModel::loadFeatureAtId) [35479ms] loading feature 1
..\..\..\src\gui\attributetable\qgsattributetablemodel.cpp(84) :
(QgsAttributeTableModel::loadFeatureAtId) [3ms] loading feature 2
... skip
line 53921
..\..\..\src\gui\attributetable\qgsattributetablemodel.cpp(84) :
(QgsAttributeTableModel::loadFeatureAtId) [0ms] loading feature 6
..\..\..\src\gui\attributetable\qgsattributetablemodel.cpp(84) :
(QgsAttributeTableModel::loadFeatureAtId) [0ms] loading feature 7
..\..\..\src\gui\attributetable\qgsattributetablemodel.cpp(84) :
(QgsAttributeTableModel::loadFeatureAtId) [11743ms] loading feature 1
..\..\..\src\gui\attributetable\qgsattributetablemodel.cpp(84) :
(QgsAttributeTableModel::loadFeatureAtId) [0ms] loading feature 2
... skip
line 72545
..\..\..\src\core\qgsmaprenderersequentialjob.cpp(131) :
(QgsMapRendererSequentialJob::internalFinished) [0ms] SEQUENTIAL finished
..\..\..\src\core\qgsmaprenderersequentialjob.cpp(37) :
(QgsMapRendererSequentialJob::~QgsMapRendererSequentialJob) [0ms]
SEQUENTIAL destruct
..\..\..\src\core\qgsmaprenderercustompainterjob.cpp(73) :
(QgsMapRendererCustomPainterJob::~QgsMapRendererCustomPainterJob) [0ms]
QPAINTER destruct
..\..\..\src\core\qgsmaplayer.cpp(165) : (QgsMapLayer::name) [16888ms]
returning name 'temporal-test-ML'
..\..\..\src\core\qgsvectorlayerundocommand.cpp(35) :
(QgsVectorLayerUndoCommandAddFeature::QgsVectorLayerUndoCommandAddFeature)
[0ms] Assigned feature id -46
... skip
line 76773
..\..\..\src\core\qgsmaprenderersequentialjob.cpp(131) :
(QgsMapRendererSequentialJob::internalFinished) [0ms] SEQUENTIAL finished
..\..\..\src\core\qgsmaprenderersequentialjob.cpp(37) :
(QgsMapRendererSequentialJob::~QgsMapRendererSequentialJob) [0ms]
SEQUENTIAL destruct
..\..\..\src\core\qgsmaprenderercustompainterjob.cpp(73) :
(QgsMapRendererCustomPainterJob::~QgsMapRendererCustomPainterJob) [0ms]
QPAINTER destruct
..\..\..\src\gui\attributetable\qgsattributetablemodel.cpp(84) :
(QgsAttributeTableModel::loadFeatureAtId) [10854ms] loading feature 1
..\..\..\src\gui\attributetable\qgsattributetablemodel.cpp(84) :
(QgsAttributeTableModel::loadFeatureAtId) [0ms] loading feature 2
... skip
line 77837
..\..\..\src\core\qgsmaprenderersequentialjob.cpp(131) :
(QgsMapRendererSequentialJob::internalFinished) [0ms] SEQUENTIAL finished
..\..\..\src\core\qgsmaprenderersequentialjob.cpp(37) :
(QgsMapRendererSequentialJob::~QgsMapRendererSequentialJob) [0ms]
SEQUENTIAL destruct
..\..\..\src\core\qgsmaprenderercustompainterjob.cpp(73) :
(QgsMapRendererCustomPainterJob::~QgsMapRendererCustomPainterJob) [2ms]
QPAINTER destruct
..\..\..\src\core\qgsvectorlayerundocommand.cpp(35) :
(QgsVectorLayerUndoCommandAddFeature::QgsVectorLayerUndoCommandAddFeature)
[12171ms] Assigned feature id -48
..\..\..\src\core\qgsmaplayer.cpp(165) : (QgsMapLayer::name) [1ms]
returning name 'temporal-test-ML'
... skip
line 80975
..\..\..\src\core\qgsmaprenderersequentialjob.cpp(131) :
(QgsMapRendererSequentialJob::internalFinished) [0ms] SEQUENTIAL finished
..\..\..\src\core\qgsmaprenderersequentialjob.cpp(37) :
(QgsMapRendererSequentialJob::~QgsMapRendererSequentialJob) [0ms]
SEQUENTIAL destruct
..\..\..\src\core\qgsmaprenderercustompainterjob.cpp(73) :
(QgsMapRendererCustomPainterJob::~QgsMapRendererCustomPainterJob) [0ms]
QPAINTER destruct
..\..\..\src\core\qgsmaplayer.cpp(165) : (QgsMapLayer::name) [10531ms]
returning name 'temporal-test-ML'
..\..\..\src\core\qgsmaplayer.cpp(165) : (QgsMapLayer::name) [0ms]
returning name 'temporal-test-ML'
... skip
line 80991
..\..\..\src\core\qgsmaplayer.cpp(165) : (QgsMapLayer::name) [0ms]
returning name 'temporal-test-ML'
..\..\..\src\core\qgsmaplayer.cpp(165) : (QgsMapLayer::name) [0ms]
returning name 'OpenStreetMap'
..\..\..\src\core\qgsmaplayer.cpp(165) : (QgsMapLayer::name) [0ms]
returning name 'OpenStreetMap'
..\..\..\src\gui\qgsbrowsertreeview.cpp(65) :
(QgsBrowserTreeView::saveState) [51391ms] expandedPaths = favorites: xyz:
..\..\..\src\core\qgsmaplayer.cpp(165) : (QgsMapLayer::name) [21ms]
returning name 'temporal-test-ML'
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