[BUG]: PublishCodeCoverageResults@2 fails to upload coverage for large solutions

[chris-meuzelaar]

New issue checklist

• I searched for existing GitHub issues
• I read pipeline troubleshooting guide
• I checked how to collect logs

Task name

PublishCodeCoverageResults

Task version

2.242.1

Issue Description

PublishCodeCoverageResults@2 fails to publish the coverage report when there are more than 1800 files in it. I don't have a hard number, but I have builds with ~500 files in the report that work properly and builds with 1800+ that get 60+% of the way through uploading the files and then just stop without any errors.

Environment type (Please select at least one enviroment where you face this issue)

• Self-Hosted
• Microsoft Hosted
• VMSS Pool
• Container

Azure DevOps Server type

dev.azure.com (formerly visualstudio.com)

Azure DevOps Server Version (if applicable)

No response

Operation system

Windows Server 2019 and 2022

Relevant log output

Publishing coverage summary data.
line- 35973 of 316641 covered.
Publishing file coverage data.
Publishing code coverage HTML report.
Uploading 4750 files.
Total file: 4750 ---- Processed file: 47 (0%).
Total file: 4750 ---- Processed file: 155 (3%).
Total file: 4750 ---- Processed file: 264 (5%).
Total file: 4750 ---- Processed file: 390 (8%).
Total file: 4750 ---- Processed file: 525 (11%).
Total file: 4750 ---- Processed file: 613 (12%).
Total file: 4750 ---- Processed file: 668 (14%).
Total file: 4750 ---- Processed file: 741 (15%).
Total file: 4750 ---- Processed file: 819 (17%).
Total file: 4750 ---- Processed file: 946 (19%).
Total file: 4750 ---- Processed file: 1076 (22%).

Finishing: Publish code coverage results

Full task logs with system.debug enabled

[Task Log.txt](https://github.com/user-attachments/files/17734403/Task.Log.txt)

Repro steps

[xmasux]

As there are no answer yet regarding this bug I also reported it in the Devloper Community: https://developercommunity.visualstudio.com/t/BUG:-PublishCodeCoverageResults2-fail/10799023

I'm facing the issue for a setup with more than 4000 files.