5d39260079
To avoid any cancelation of the parent context from affecting lookupGroup operations, Resolver.LookupIPAddr previously used an entirely new context created from context.Background(). However, this meant that all the values in the parent context with which LookupIPAddr was invoked were dropped. This change provides a custom context implementation that only preserves values of the parent context by composing context.Background() and the parent context. It only falls back to the parent context to perform value lookups if the parent context has not yet expired. This context is never canceled, and has no deadlines. Fixes #28600 Change-Id: If2f570caa26c65bad638b7102c35c79d5e429fea Reviewed-on: https://go-review.googlesource.com/c/148698 Run-TryBot: Emmanuel Odeke <emm.odeke@gmail.com> Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org> |
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