TisonKun commented on a change in pull request #9832: [FLINK-11843] Bind 
lifespan of Dispatcher to leader session
URL: https://github.com/apache/flink/pull/9832#discussion_r337831497
 
 

 ##########
 File path: 
flink-runtime/src/main/java/org/apache/flink/runtime/entrypoint/component/DefaultDispatcherResourceManagerComponentFactory.java
 ##########
 @@ -182,26 +182,25 @@ public DispatcherResourceManagerComponent create(
 
                        final HistoryServerArchivist historyServerArchivist = 
HistoryServerArchivist.createHistoryServerArchivist(configuration, 
webMonitorEndpoint);
 
-                       jobManagerMetricGroup = 
MetricUtils.instantiateJobManagerMetricGroup(
 
 Review comment:
   We remains a `jobManagerMetricGroup` variable above. IIUC we change 
`jobManagerMetricGroup` to `JobManagerMetricGroupFactory` so that we can remove 
that variable.

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