ableegoldman commented on a change in pull request #11857:
URL: https://github.com/apache/kafka/pull/11857#discussion_r821099068



##########
File path: 
streams/src/main/java/org/apache/kafka/streams/processor/internals/TopologyMetadata.java
##########
@@ -84,14 +84,14 @@
         public AtomicLong topologyVersion = new AtomicLong(0L); // the local 
topology version
         public ReentrantLock topologyLock = new ReentrantLock();
         public Condition topologyCV = topologyLock.newCondition();
-        public List<TopologyVersionWaiters> activeTopologyWaiters = new 
LinkedList<>();
+        public List<TopologyVersionListener> activeTopologyUpdateListeners = 
new LinkedList<>();

Review comment:
       Oh right actually no, we. do still need it to be an AtomicLong as we 
check it in the StreamThread main loop when looking for topology updates. And 
obviously we don't want to have to grab the full lock for that




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