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Delete the entry for the waiter when the timeout is reached #694

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merged 1 commit into from
Apr 8, 2020

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ankon
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@ankon ankon commented Apr 7, 2020

When the lock times out the promise rejects, and the calling code will do "something sensible". Something sensible
could be to retry later -- but that actually requires the lock to be able to be acquired again. Right now this is
not possible, because the failed tryToAcquire is still inside the waiting queue -- and will never release the lock.

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ankon commented Apr 7, 2020

This should fix one aspect of the problem mentioned in #666 (comment): We should be able to continue, even after a client has hit the timeout.

I still need to find the reason for timeout, but I think this is independent and might be more caused by what my application code is doing with KafkaJS.

src/utils/lock.js Outdated Show resolved Hide resolved
When the lock times out the promise rejects, and the calling code will do "something sensible". Something sensible
could be to retry later -- but that actually requires the lock to be able to be acquired again. Right now this is
not possible, because the failed `tryToAcquire` is still inside the waiting queue -- and will never release the lock.
@ankon ankon force-pushed the pr/lock-delete-waiter-on-timeout branch from 42c15be to 86ef01b Compare April 8, 2020 16:30
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ankon commented Apr 8, 2020

I think the first option is fine. It is a bit unintuitive since there's nothing to indicate that the error will contain a reference to the waiting list, but it's fine.

Changed. I added a comment as well, so that readers of the code won't be too confused :)

@Nevon Nevon merged commit 2faef07 into tulios:master Apr 8, 2020
@ankon ankon deleted the pr/lock-delete-waiter-on-timeout branch April 8, 2020 17:31
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2 participants