Function isPortError

core/remotes/docker/resolver.go:1013–1023

(err error, host string)

}

func isPortError(err error, host string) bool {
	if isConnError(err) || os.IsTimeout(err) {
		if _, port, _ := net.SplitHostPort(host); port != "" {
			// Port is specified, will not retry on different port with scheme change
			return false
		}
		return true
	}

	return false
}