zentol commented on a change in pull request #6702: [FLINK-10135] The 
JobManager does not report the cluster-level metrics
URL: https://github.com/apache/flink/pull/6702#discussion_r224013715
 
 

 ##########
 File path: 
flink-runtime/src/main/java/org/apache/flink/runtime/resourcemanager/ResourceManager.java
 ##########
 @@ -734,6 +744,18 @@ public void requestHeartbeat(ResourceID resourceID, Void 
payload) {
                }
        }
 
+       private void registerSlotAndTaskExecutorMetrics() {
+               jobManagerMetricGroup.gauge(
+                       TASK_SLOTS_AVAILABLE_METRIC_NAME,
+                       () -> (long) slotManager.getNumberFreeSlots());
 
 Review comment:
   Solving this issue would be overkill for this PR, I agree.

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