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net:getaddrinfo/2 never returns 'nxdomain': unknown names are reported as 'enoname' and temporary failures, such as DNS timeouts, as 'eagain'. Therefore, timed out lookups were never detected, and error reasons differed from those of the gethostbyname path. Map 'eagain' to 'timeout' and 'enoname' to 'nxdomain'. Don't retry failed lookups, as the resolver already retries according to its own configuration.
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Since commit 3b6acfe, net:getaddrinfo/2 is used for hostname resolution. That function never returns
nxdomain: unknown names are reported asenonameand temporary failures, such as DNS timeouts, aseagain. Therefore, timed out lookups were never detected, and error reasons differed from those of the gethostbyname path.Map
eagaintotimeoutandenonametonxdomain. Don't retry failed lookups, as the resolver already retries according to its own configuration.