[ENH] delete collection during teardown of state machine

[codetheweb]

Hoping that this will fix an issue on our nightly tests where the runner seems to crash without giving a reason--often can be due to CPU/memory starvation.

[github-actions]

Reviewer Checklist

Please leverage this checklist to ensure your code review is thorough before approving

Testing, Bugs, Errors, Logs, Documentation

• Can you think of any use case in which the code does not behave as intended? Have they been tested?
• Can you think of any inputs or external events that could break the code? Is user input validated and safe? Have they been tested?
• If appropriate, are there adequate property based tests?
• If appropriate, are there adequate unit tests?
• Should any logging, debugging, tracing information be added or removed?
• Are error messages user-friendly?
• Have all documentation changes needed been made?
• Have all non-obvious changes been commented?

System Compatibility

• Are there any potential impacts on other parts of the system or backward compatibility?
• Does this change intersect with any items on our roadmap, and if so, is there a plan for fitting them together?

Quality

• Is this code of a unexpectedly high quality (Readability, Modularity, Intuitiveness)

[tazarov]

@codetheweb, we've observed this quite some time ago, and the speculation at the time was that the default GH runners have too little memory, thus containers getting killed due to OOM. If this behaviour persists I'd suggest (and I think we may even had a PR, closed by now surely) adding a post-mortem step to dump the docker stated so we can look at the oom killed flag.

[codetheweb]

@codetheweb, we've observed this quite some time ago, and the speculation at the time was that the default GH runners have too little memory, thus containers getting killed due to OOM. If this behaviour persists I'd suggest (and I think we may even had a PR, closed by now surely) adding a post-mortem step to dump the docker stated so we can look at the oom killed flag.

if you happen to have a link to that PR would love to see it, part of the challenge is that GH doesn't seem to fully retain logs when a runner dies