empty check

Author: jeanbisutti

agent/agent-tooling/src/main/java/com/microsoft/applicationinsights/agent/internal/perfcounter/AbstractJmxPerformanceCounter.java

@@ -35,7 +35,9 @@ public synchronized void report(TelemetryClient telemetryClient) {
     try {
       Map<String, Collection<Object>> result = JmxDataFetcher.fetch(objectName, attributes);
 
-      logger.info("Fetched JMX metrics: ", result);
+      if (!result.isEmpty()) {
+        logger.info("Fetched JMX metrics: ", result);
+      }
 
       for (Map.Entry<String, Collection<Object>> displayAndValues : result.entrySet()) {
         boolean ok = true;