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https://issues.apache.org/jira/browse/TS-825?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Leif Hedstrom updated TS-825:
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Backport to Version: (was: 3.0.0)
Fix Version/s: 3.0.0
> negative caching caches responses that should never be cached
> -------------------------------------------------------------
>
> Key: TS-825
> URL: https://issues.apache.org/jira/browse/TS-825
> Project: Traffic Server
> Issue Type: Bug
> Components: HTTP
> Affects Versions: 2.1.9, 2.1.8, 2.1.7, 2.1.6, 2.1.5, 2.1.4
> Reporter: William Bardwell
> Assignee: Leif Hedstrom
> Priority: Minor
> Fix For: 3.1.0, 3.0.0
>
> Attachments: negative-caching-patch.diff
>
>
> If you turn on negative caching almost all status codes are cached. But some
> of those status codes can not be reasonably cached IMHO and so I would
> propose not caching 401, 303 and 407 statuses. (The negative caching code
> ends up marking just about everything as cacheable, and then later decides
> that some stuff is 'negative cacheable' but things that aren't negative
> cacheable are still just cached, and there is no way to say 'never cache
> this'. So you just have to add clauses to
> HttpTransact::is_response_cacheable(), which is what my patch does.
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