noblepaul commented on code in PR #1964:
URL: https://github.com/apache/solr/pull/1964#discussion_r1510479018


##########
solr/solrj-zookeeper/src/java/org/apache/solr/common/cloud/ZkStateReader.java:
##########
@@ -1763,26 +1784,29 @@ public void registerCollectionStateWatcher(
    * <p>The Watcher will automatically be removed when it's 
<code>onStateChanged</code> returns
    * <code>true</code>
    */
-  public void registerDocCollectionWatcher(String collection, 
DocCollectionWatcher stateWatcher) {
-    AtomicBoolean watchSet = new AtomicBoolean(false);
+  public void registerDocCollectionWatcher(
+      String collection, DocCollectionWatcher docCollectionWatcher) {
+    AtomicReference<StateWatcher> newWatcherRef = new AtomicReference<>();
     collectionWatches.compute(
         collection,
         (k, v) -> {
           if (v == null) {
-            v = new StatefulCollectionWatch();
-            watchSet.set(true);
+            StateWatcher stateWatcher = new StateWatcher(collection);

Review Comment:
   same here too
   ```
               v = new StatefulCollectionWatch(new StateWatcher(collection));
               newWatcherRef.set(v.associatedWatcher);
   ```



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