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cache insert null message when can't connect dns server #27

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foreversunyao opened this issue Jul 2, 2017 · 0 comments

foreversunyao commented Jul 2, 2017

forwarding.go

if absoluteErr != nil {
log.Errorf("[%d] Error looking up literal qname '%s' with upstreams: %v", req.Id, name, absoluteErr)
return nil
}

if not return nil here, cache will keep null message, and when dns server works dig will get null message from the cache.

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