fapifta commented on a change in pull request #704: HDDS-3248. shutdown 
defaultMetricsSystem before tests
URL: https://github.com/apache/hadoop-ozone/pull/704#discussion_r397231320
 
 

 ##########
 File path: 
hadoop-hdds/container-service/src/test/java/org/apache/hadoop/ozone/container/common/impl/TestHddsDispatcher.java
 ##########
 @@ -276,6 +283,13 @@ private HddsDispatcher createDispatcher(DatanodeDetails 
dd, UUID scmId,
     return hddsDispatcher;
   }
 
+  private void shutdownDispatcher(HddsDispatcher dispatcher){
+    if(dispatcher != null) {
+      dispatcher.shutdown();
+    }
+    ContainerMetrics.remove();
 
 Review comment:
   I am not convinced whether this step to remove the ContainerMetrics belongs 
to a method called shutdownDispatcher, at least from the name it is not clear 
it will do so besides shutting down the dispatcher. Shouldn't we separate this 
two?

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