Server fail with OutOfmemory for some GetLegendGraphic request

[gschwind]

Hello,

The server do fail with OutOfMemory error for GetLengendGraphic request with colored_contours when there are too many variable overrides in wmsConfig.xml. I tried removing overrides and the request work.

I did prepare the attached Dockerfile with needed files to generate an image to reproduce the issue. To use the image, gather the attached files

tds-issue-docker.tar.gz

in a directory, go to that directory, run docker build -t bug-tds . then run docker run -d -p 80:8080 bug-tds, and open the url [1] in your browser.

Use docker to monitor the docker container.

I use the official thredds 5.6 image.

Best regards

[1] http://localhost/thredds/wms/waves-med/IREMAREMED_WaveTm02.nc?REQUEST=GetLegendGraphic&PALETTE=default&LAYERS=WaveTm02_min_AllSeasons&STYLES=colored_contours/default

[lesserwhirls]

We've seen memory usage issues with the WMS service when loading datasets (even small grids can consume gigabytes of memory when opening the file, although that space is quickly garbage collected after the open finishes), and I'm wondering if that is what you have been experiencing. I will need to reproduce this locally, outside of docker. Have you tried serving the dataset through ncWMS2 directly?