sdk: implement multi-threading tests for BatchSpanProcessor

[mauriciovasquezbernal]

As @Oberon00 suggested in #389 (comment), we are missing multi-threading tests for the batch span processor.
Those tests should check that shutdown, force_flush can be called concurrently without causing racing conditions.

[ocervell]

+1, this is a blocker for my customer - can we trust the BatchSpanProcessor to work across threads / processes ?

[aravinsiva]

I'd be happy to look into this if help is still needed

[codeboten]

Thanks @aravinsiva, assigning it to you

[aravinsiva]

I just need a bit more clarification on this. I was under the impression that batch processors already run on a separate thread. So what exactly is meant by 'multi-threading' tests?

[lzchen]

@aravinsiva
Have you taken a look at this comment? I believe they are referring to the behaviour for shutdown and force_flush when they are called at the same time in different threads (e.g. multiple BatchSpanProcessors)

[aabmass]

@lzchen I'm confused how you can test this with "multiple BatchSpanProcessors" here? The issue says

Those tests should check that shutdown, force_flush can be called concurrently without causing racing conditions.

doesn't that mean calling those methods on a single BatchExportSpanProcessor instance concurrently from different threads?

[aravinsiva]

Please reassign ticket as internship is concluding.

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[github-actions]

Closed as inactive. Feel free to reopen if this issue needs resolving.