[BUG]: DotNetCoreCLI@2 Error: Failed find: EACCES: permission denied

[ReinhardvdBerg]

New issue checklist

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

Task name

DotNetCoreCLI@2

Task version

2.247.3

Issue Description

Hi, I we starting getting this error a couple hours ago when trying to run C# unit tests across allot of our pipelines:

##[error]Error: Failed find: EACCES: permission denied, scandir '/agent/_work/_temp/.cache/fanal'

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

Ubuntu 20.04

Relevant log output

Starting: Unit Tests (if any)
==============================================================================
Task         : .NET Core
Description  : Build, test, package, or publish a dotnet application, or run a custom dotnet command
Version      : 2.247.3
Author       : Microsoft Corporation
Help         : https://docs.microsoft.com/azure/devops/pipelines/tasks/build/dotnet-core-cli
==============================================================================
Info: .NET Core SDK/runtime 2.2 and 3.0 are now End of Life(EOL) and have been removed from all hosted agents. If you're using these SDK/runtimes on hosted agents, kindly upgrade to newer versions which are not EOL, or else use UseDotNet task to install the required version.
Info: Azure Pipelines hosted agents have been updated and now contain .Net 5.x SDK/Runtime along with the older .Net Core version which are currently lts. Unless you have locked down a SDK version for your project(s), 5.x SDK might be picked up which might have breaking behavior as compared to previous versions. You can learn more about the breaking changes here: https://docs.microsoft.com/en-us/dotnet/core/tools/ and https://docs.microsoft.com/en-us/dotnet/core/compatibility/ . To learn about more such changes and troubleshoot, refer here: https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/build/dotnet-core-cli?view=azure-devops#troubleshooting
##[error]Error: Failed find: EACCES: permission denied, scandir '/agent/_work/_temp/.cache/fanal'
Finishing: Unit Tests (if any)

Full task logs with system.debug enabled

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Repro steps

[justastudenttryingtolearn]

In our case it seems the cause of the build agents becoming corrupted was that we had some builds still using SonarQube Tasks on a deprecated version (specifically @5) but theses builds didn't fail as usual - leading to subsequent builds failing.
The finer details of why this happens still alludes me but ultimately updating these versions and deleting the poisoned build agents fixed the problem.