#5550: Fix concurrent access of file based cache at expiry time breaks
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Reporter: timr | Type: Bug
Status: new | Priority: Medium
Milestone: 1.2.x.x | Component: Cache
Version: RC2 | Severity: Normal
Keywords: | Php_version: n/a
Cake_version: 1.2.0.7296 RC2 |
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I believe this patch actually fixes the bug I was trying to fix in patch
https://trac.cakephp.org/ticket/5541
If you did multiple ajax requests (technically they didn't have to be
ajax) and they both hit at the same time while the cache was expired, one
of them would error out.
By turning locking on (which was broken before issue 5541), I hoped to
avoid that problem, but it seems the existing locking wasn't good enough.
I added lock and unlock methods to the file object and had the file cache
use them. That way it can lock during the multiple reads it does, and
upgrade the lock if the cache is expired.
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Ticket URL: <https://trac.cakephp.org/ticket/5550>
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