#14 Checker Concurrency Issues?

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opened 3 months ago by hz · 0 comments
hz commented 3 months ago

With cs_checker_parallel_checks >= 1, there is a chance that the results recorded to the problemstate log are not actually associated with the most recent submission. A check should be added to make sure that the result we just computed is actually associated with the most recent submission before writing to the problemstate log.

I think this is what happened on 6.009’s quiz 3 last term, where several students’ submissions were left spinning.

Some work needs to be done here to reproduce the issue before we can really track down a fix.

With <code>cs_checker_parallel_checks</code> >= 1, there is a chance that the results recorded to the <code>problemstate</code> log are not actually associated with the most recent submission. A check should be added to make sure that the result we just computed is actually associated with the most recent submission before writing to the <code>problemstate</code> log. I think this is what happened on 6.009's quiz 3 last term, where several students' submissions were left spinning. Some work needs to be done here to reproduce the issue before we can really track down a fix.
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