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respond with REFUSED when max_concurrent is exceeded to avoid caching it (#4326)

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Signed-off-by: Chris O'Haver <cohaver@infoblox.com>
This commit is contained in:
Chris O'Haver
2020-12-15 08:02:15 -05:00
committed by GitHub
parent 45bf23f145
commit 9cb53487ec
3 changed files with 12 additions and 2 deletions
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2
plugin/forward/forward.go
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@@ -83,7 +83,7 @@ func (f *Forward) ServeDNS(ctx context.Context, w dns.ResponseWriter, r *dns.Msg
defer atomic.AddInt64(&(f.concurrent), -1)
if count > f.maxConcurrent {
MaxConcurrentRejectCount.Add(1)
return dns.RcodeServerFailure, f.ErrLimitExceeded
return dns.RcodeRefused, f.ErrLimitExceeded
}
}