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[Cache] Fixed expiry could be int in ChainAdapter due to race conditions #38879

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Merged
merged 0 commits into from
Oct 29, 2020
Merged

[Cache] Fixed expiry could be int in ChainAdapter due to race conditions #38879

merged 0 commits into from
Oct 29, 2020

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@phamviet
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@phamviet phamviet commented Oct 29, 2020

Q A
Branch? 4.4
Bug fix? yes
New feature? no
Deprecations? no
Tickets Fix #38635
License MIT
Doc PR no

This bug is hard to re-produce and seems only happen with ArrayAdapter only.

Steps to reproduce:

cache.yaml

simple.cache:
        adapters:
          - cache.adapter.array
          - cache.adapter.redis

if (isset($item->metadata[CacheItem::METADATA_EXPIRY])) {
    $logger->debug($item->key, $item->metadata);
    $format = is_int($item->metadata[CacheItem::METADATA_EXPIRY]) ? 'U' : 'U.u';
    $item->expiresAt(\DateTime::createFromFormat($format, $item->metadata[CacheItem::METADATA_EXPIRY]));
 }

Refresh webpage multiple time to make web server busy and logs:

[2020-10-29T17:04:51.119653+07:00] application.DEBUG: item-key {"expiry":1603965892.118222,"ctime":4} []
[2020-10-29T17:04:54.322937+07:00] application.DEBUG: item-key {"expiry":1603965895.308393,"ctime":17} []
[2020-10-29T17:04:54.745923+07:00] application.DEBUG: item-key {"expiry":1603965895,"ctime":16} []

@carsonbot carsonbot added this to the 4.4 milestone Oct 29, 2020
@phamviet phamviet mentioned this pull request Oct 29, 2020
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@nicolas-grekas
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nicolas-grekas commented Oct 29, 2020

Thank you @phamviet.

@nicolas-grekas nicolas-grekas merged commit fdff819 into symfony:4.4 Oct 29, 2020
@nicolas-grekas
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nicolas-grekas commented Oct 29, 2020

For ref, I improved this a bit in 13af58c

@Nyholm
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Nyholm commented Oct 29, 2020

Thank you @phamviet for finding and fixing this!

@fabpot fabpot mentioned this pull request Nov 10, 2020
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4 participants

@phamviet @nicolas-grekas @Nyholm @carsonbot