tasanuma commented on code in PR #6510:
URL: https://github.com/apache/hadoop/pull/6510#discussion_r1476061151


##########
hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/server/namenode/ha/RouterObserverReadProxyProvider.java:
##########
@@ -84,7 +84,8 @@ public class RouterObserverReadProxyProvider<T> extends 
AbstractNNFailoverProxyP
 
   public RouterObserverReadProxyProvider(Configuration conf, URI uri, Class<T> 
xface,
       HAProxyFactory<T> factory) {
-    this(conf, uri, xface, factory, new IPFailoverProxyProvider<>(conf, uri, 
xface, factory));
+    this(conf, uri, xface, factory,
+        new ConfiguredFailoverProxyProvider<>(conf, uri, xface, factory));

Review Comment:
   As an alternative approach, what if we created a 
`RouterObserverReadProxyProviderWithIPFailover` using `IPFailoverProxyProvider` 
to align it with `ObserverReadProxyProviderWithIPFailover`?
   
   ```java
   public class RouterObserverReadProxyProviderWithIPFailover<T>  
       extends RouterObserverReadProxyProvider<T> {  
     
     @VisibleForTesting  
     static final Logger LOG =  
         
LoggerFactory.getLogger(RouterObserverReadProxyProviderWithIPFailover.class);  
     
     public RouterObserverReadProxyProviderWithIPFailover(Configuration conf, 
URI uri, Class<T> xface,  
         HAProxyFactory<T> factory) {  
       super(conf, uri, xface, factory, new IPFailoverProxyProvider<>(conf, 
uri, xface, factory));  
     }  
   }
   ```



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