Bug report #19436
High memory usage with Snap geometries to layer and "exception:unknown" message
| Status: | Open | ||
|---|---|---|---|
| Priority: | Normal | ||
| Assignee: | - | ||
| Category: | Digitising | ||
| Affected QGIS version: | 3.7(master) | Regression?: | No |
| Operating System: | Windows 10 | Easy fix?: | No |
| Pull Request or Patch supplied: | No | Resolution: | |
| Crashes QGIS or corrupts data: | No | Copied to github as #: | 27264 |
Description
In some circumstances, the computer freezes with 99.9% memory usage (then task manager stops responding...) when using the algorithm 'Snap geometries to layer'.
It apparently happens only when snapping a line layer to a point reference layer, with a small tolerance (0.00001 or lower).
It happend initially on a huge shapefile with geometry errors, but then I could reproduce it with tempopary layers: a line layer with a single line and a point layer with 3 points: the 1st point was precisely on a vertex, the 2nd point close to a second vertex (within the tolerance radius) and the 3rd point quite far from the line.
Because I had to "brutally" shut down and restart the computer, I don't have any test file to attach and no crash log. The only details that were left were the processing history:
processing.run("qgis:snapgeometries", {'INPUT':'Point?crs=EPSG:4326&uid={50146ea0-3a7a-4515-8241-e842f2ef1717}','REFERENCE_LAYER':'LineString?crs=EPSG:4326&uid={c6586332-d416-495e-868d-e34430dab439}','TOLERANCE':1e-5,'BEHAVIOR':0,'OUTPUT':'memory:'})
History
#1
Updated by Nyall Dawson over 6 years ago
- Status changed from Open to Closed
- Resolution set to duplicate
Duplicate of #18497
#2
Updated by Antoine Lafranchis over 5 years ago
- File test_project.qgz added
- File QGIS.zip added
- File test_snap_config.png added
- File test_memory_usage.png added
- Status changed from Closed to Reopened
I still experience abnormally high memory usage and Qgis freezing when snapping points to lines with small tolerance.
This time i ended qgis-dev from the task manager without waiting for the probable crash so that i could send this update.
Memory usage was at 2.5 GB and continuously increasing. The 2 shapefiles contain only 6 features in total.
It's apparently not a duplicate of #18497 which is fixed.
#3
Updated by Giovanni Manghi over 5 years ago
- Resolution deleted (
duplicate) - Status changed from Reopened to Feedback
Antoine Lafranchis wrote:
I still experience abnormally high memory usage and Qgis freezing when snapping points to lines with small tolerance.
This time i ended qgis-dev from the task manager without waiting for the probable crash so that i could send this update.
Memory usage was at 2.5 GB and continuously increasing. The 2 shapefiles contain only 6 features in total.
It's apparently not a duplicate of #18497 which is fixed.
sure have you tested a recent build?
#4
Updated by Antoine Lafranchis over 5 years ago
- File qgis_snap_exception.png added
- File qgis_version.png added
I use build 4d5dad8172.
I tried again to snap the same layers and waited. It didn't actually crash, memory usage peaked at 2.6 GB then dropped suddenly and displayed an "exception:unknown" message.
#5
Updated by Giovanni Manghi over 5 years ago
- Category changed from Processing/Core to Digitising
- Status changed from Feedback to Open
- Priority changed from High to Normal
- Affected QGIS version changed from 3.2 to 3.7(master)
- Crashes QGIS or corrupts data changed from Yes to No
- Subject changed from Windows crash with Snap geometries to layer to High memory usage with Snap geometries to layer and "exception:unknown" message