07d861c5ff
Motivation: When DnsNameResolverContext succeeds to get the address(es), it cancels the promise of other queries in progress. Unlike expectation, DnsNameResolverContext.query() attempts to retry even when the query has failed due to cancellation. As a result, the resolver sends unnecessary extra queries to a DNS server and then tries to mark the promised that's been fulfilled already, leading to unnecessarily verbose 'failed to notify success to a promise' messages. Modifications: Do not perform an extra query when the previous query has failed due to cancellation Result: DnsNameResolver does not send unnecessary extra queries and thus does not log the 'failed to notify success to a promise' message. |
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io/netty/resolver/dns |