ndimiduk commented on a change in pull request #812: HBASE-23275: Track active 
master's address in ActiveMasterManager
URL: https://github.com/apache/hbase/pull/812#discussion_r347628985
 
 

 ##########
 File path: 
hbase-server/src/main/java/org/apache/hadoop/hbase/master/ActiveMasterManager.java
 ##########
 @@ -57,12 +56,18 @@
   final AtomicBoolean clusterHasActiveMaster = new AtomicBoolean(false);
   final AtomicBoolean clusterShutDown = new AtomicBoolean(false);
 
+  // This server's information.
   private final ServerName sn;
   private int infoPort;
   private final Server master;
 
+  // Active master's server name. Invalidated anytime active master changes 
(based on ZK
+  // notifications) and lazily fetched on-demand.
+  // ServerName is immutable, so we don't need heavy synchronization around it.
 
 Review comment:
   No, this is a fair point. It would be nice to consolidate these concerns, 
but if we don't have the test coverage and you don't have the capacity for a 
manual test, better leave it as is.

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