pzampino commented on a change in pull request #307: KNOX-2304 - CM discovery 
cluster config monitor needs to be aware of …
URL: https://github.com/apache/knox/pull/307#discussion_r405592686
 
 

 ##########
 File path: 
gateway-discovery-cm/src/main/java/org/apache/knox/gateway/topology/discovery/cm/monitor/PollingConfigurationAnalyzer.java
 ##########
 @@ -365,12 +375,32 @@ private DiscoveryApiClient getApiClient(final 
ServiceDiscoveryConfig discoveryCo
                                                clusterName,
                                                lastTimestamp);
     for (ApiEvent event : events) {
-      restartEvents.add(new RestartEvent(event));
+      List<ApiEventAttribute> attributes = event.getAttributes();
+      Map<String,Object> map = getAttributeMap(attributes);
+      addIfRelevantEvent(restartEvents, event, map);
     }
 
     return restartEvents;
   }
 
+  @SuppressWarnings("unchecked")
+  private void addIfRelevantEvent(List<RestartEvent> restartEvents, ApiEvent 
event, Map<String, Object> map) {
+    String command = null;
+    String status = null;
+    command = (String) ((List<String>) map.get(COMMAND)).get(0);
+    status = (String) ((List<String>) map.get(COMMAND_STATUS)).get(0);
+    if (START_COMMAND.equals(command) || RESTART_COMMAND.equals(command) &&
+        SUCCEEDED_STATUS.equals(status) || STARTED_STATUS.equals(status)) {
+      restartEvents.add(new RestartEvent(event));
+    }
+  }
+
+  private Map<String, Object> getAttributeMap(List<ApiEventAttribute> 
attributes) {
+    Map<String,Object> map = new HashMap<>();
+    attributes.forEach(attr -> { map.put(attr.getName(), attr.getValues());});
 
 Review comment:
   The map is associated with a specific ApiEvent, so I'm not sure that the map 
is the concern. We may want to sort the ApiEvent collection by _timeOccurred_ 
to avoid issues associated with what you're describing.

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