threadlocaltests.runthreadlocaltest8_values thows taskschedulerexception on SLES

[runfoapp]

Runfo Tracking Issue: threadlocaltests.runthreadlocaltest8_values thows taskschedulerexception on SLES

Build	Definition	Kind	Run Name	Console	Core Dump	Test Results	Run Client
961727	runtime	Rolling	net6.0-Linux-Release-x64-Mono_release-SLES.12.Amd64.Open
961572	runtime	Rolling	net6.0-Linux-Release-x64-Mono_release-SLES.12.Amd64.Open
961065	runtime	Rolling	net6.0-Linux-Release-x64-Mono_release-SLES.12.Amd64.Open
960758	runtime	Rolling	net6.0-Linux-Release-x64-Mono_release-SLES.12.Amd64.Open
959437	runtime	PR 47210	net5.0-Linux-Debug-x64-Mono_release-SLES.12.Amd64.Open	console.log		test results	runclient.py
957661	runtime	PR 47210	net5.0-Linux-Debug-x64-Mono_release-SLES.12.Amd64.Open	console.log		test results	runclient.py
952932	runtime	Rolling	net5.0-Linux-Release-x64-Mono_release-SLES.12.Amd64.Open	console.log		test results	runclient.py
951047	runtime	PR 47002	net5.0-Linux-Debug-x64-Mono_release-SLES.12.Amd64.Open	console.log		test results	runclient.py
949699	runtime	Rolling	net5.0-Linux-Release-x64-Mono_release-SLES.12.Amd64.Open	console.log		test results	runclient.py
946185	runtime	PR 46745	net5.0-Linux-Debug-x64-Mono_release-SLES.12.Amd64.Open	console.log		test results	runclient.py

Build Result Summary

Day Hit Count	Week Hit Count	Month Hit Count
0	0	0

[dotnet-issue-labeler]

I couldn't figure out the best area label to add to this issue. If you have write-permissions please help me learn by adding exactly one area label.

[hoyosjs]

@kouvel do you know who would be the best to help look at this?

[stephentoub]

The relevant part of the error:
" ---- System.ExecutionEngineException : Couldn't create thread. Error 0x0"

[lambdageek]

That said, there is something very strange going on:

System.ExecutionEngineException : Couldn't create thread. Error 0x0

The only code that I can find that has that string is

runtime/src/mono/mono/metadata/threads.c

Line 1441 in ce4c725

mono_error_set_execution_engine (error, "Couldn't create thread. Error 0x%x", mono_w32error_get_last());

but that code is explicitly for non-netcore Mono. It shouldn't even be compiled - how is it running???

[akoeplinger]

How is this test even running, it's supposed to be disabled on mono:

runtime/src/libraries/System.Threading/tests/ThreadLocalTests.cs

Lines 227 to 228 in 16e6e95

	[ActiveIssue("https://github.com/dotnet/runtime/issues/43981", TestRuntimes.Mono)]
	public static void RunThreadLocalTest8_Values()

[akoeplinger]

Ah, looks like all of these failures come from PRs/builds targetting the release/5.0 branch where this test is still enabled: #43981 (comment)

[akoeplinger]

I've opened a backport PR for 5.0 here: #47276

I don't think there's anything else to do here so closing.