void handleException(Exception e, Object data, int timesFetched) {
        logMessage("Unable to parse json '" + data + "' for service '" + service + "': ", e, timesFetched);
    }
@param service the service to fetch metrics from
@param port    the port to use
metrics-proxy/src/main/java/ai/vespa/metricsproxy/service/HttpMetricFetcher.java