IndexOutOfRangeException when parsing models in multithreads

[digitaltwinconsortium]

IndexOutOfRangeException when parsing models in multithreads

[rido-min]

can we add a test to verify multi thread scenarios?

[jrdouceur]

Not really. Not a deterministic test. It shows up only probabilistically unless we were to use some concurrency test system that allows us to control the interleaving.

[rido-min]

I understand that multi-threading issues are difficult to reproduce, but we could try to reproduce, maybe using some test benchmark like https://github.com/timcassell/ProtoBenchmarkHelpers ?

[jrdouceur]

According to #87:

this can be reproduced when running unit-tests that use the model parser from the Visual Studio unit-test runner, which will execute the tests on multiple threads by default.

So one option may be to change the ci action to execute tests in parallel.

[rido-min]

@jaslawinMs can you share more details about your tests? Do you share any parser instances across threads, maybe using static variables? or is the parser instantiated on each test method?

[jaslawinMs]

tests are executed in parallel (xunit). The parser object is created for each test (a field in a test class).
I also used static field and ThreadStatic attribute but it had no effect