Ignore when live data after GC size is zero

In some cases, the live data after GC size in the GC notification is
reported as 0. We should ignore these notifications.

Closes gh-4497

micrometer-core/src/main/java/io/micrometer/core/instrument/binder/jvm/JvmGcMetrics.java

@@ -218,11 +218,12 @@ public void handleNotification(Notification notification, Object ref) {
             }
 
             // Some GC implementations such as G1 can reduce the old gen size as part of a
-            // minor GC. To track the
-            // live data size we record the value if we see a reduction in the long-lived
-            // heap size or
-            // after a major/non-generational GC.
-            if (longLivedAfter < longLivedBefore || shouldUpdateDataSizeMetrics(notificationInfo.getGcName())) {
+            // minor GC. To track the live data size we record the value if we see a
+            // reduction in the long-lived
+            // heap size or after a major/non-generational GC. In some cases,
+            // longLivedAfter is 0, we ignore those notifications, see: gh-4497.
+            if (longLivedAfter > 0 && (longLivedAfter < longLivedBefore
+                    || shouldUpdateDataSizeMetrics(notificationInfo.getGcName()))) {
                 liveDataSize.set(longLivedAfter);
                 maxDataSize.set(longLivedPoolNames.stream().mapToLong(pool -> after.get(pool).getMax()).sum());
             }