jackjlli commented on a change in pull request #4662: Add wait for condition 
for toggle test
URL: https://github.com/apache/incubator-pinot/pull/4662#discussion_r330393204
 
 

 ##########
 File path: 
pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/PinotHelixResourceManager.java
 ##########
 @@ -268,44 +268,42 @@ private void addInstanceGroupTagIfNeeded() {
    */
 
   /**
-   * Get all instance Ids.
-   *
+   * Get all instance Ids. If it's related to segment operation like assigning 
segments to instances, cache accessor would be used.
+   * Otherwise, direct data accessor would be used.
+   * @param segmentRelatedOperation whether it's related to segment operation
    * @return List of instance Ids
    */
   @Nonnull
-  public List<String> getAllInstances() {
-    return _cacheInstanceConfigsDataAccessor.getChildNames("/", 
AccessOption.PERSISTENT);
+  public List<String> getAllInstances(boolean segmentRelatedOperation) {
 
 Review comment:
   One of the usages of this method is to toggle the segment state, which can 
also be a segment operation though.

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