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Re: Race in svn_atomic_namespace__create

From: Philip Martin <philip.martin_at_wandisco.com>
Date: Mon, 29 Oct 2012 21:46:00 +0000

Philip Martin <philip.martin_at_wandisco.com> writes:

> Philip Martin <philip.martin_at_wandisco.com> writes:
>
>> I can't see any order in which we can do attach/create that doesn't have
>> a similar race. I think the best solution is a short loop trying
>> attach-create a few times before giving up.
>
> I've committed a loop in r1403463. That doesn't fix the race but it is
> now very unlikely to fail.

I've just observed the same failure with the looping code. I'm not sure
what is wrong. I suppose there is a window during the creation process
where the file exists, so the create fails, but the memory is not yet
ready, so the attach also fails. If one process is in this state
another process might loop around 10 times and have both create and
attach fail. Perhaps a short and/or random delay would help?

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Received on 2012-10-29 22:46:37 CET

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