diff --git a/server/src/main/java/org/opensearch/action/support/clustermanager/TransportClusterManagerNodeAction.java b/server/src/main/java/org/opensearch/action/support/clustermanager/TransportClusterManagerNodeAction.java
index 345be620703bd..a24b50bee4287 100644
--- a/server/src/main/java/org/opensearch/action/support/clustermanager/TransportClusterManagerNodeAction.java
+++ b/server/src/main/java/org/opensearch/action/support/clustermanager/TransportClusterManagerNodeAction.java
@@ -125,6 +125,7 @@ protected void masterOperation(Request request, ClusterState state, ActionListen
         throw new UnsupportedOperationException("Must be overridden");
     }
 
+    // TODO: Add abstract keyword after removing the deprecated masterOperation()
     protected void clusterManagerOperation(Request request, ClusterState state, ActionListener<Response> listener) throws Exception {
         masterOperation(request, state, listener);
     }
diff --git a/server/src/main/java/org/opensearch/action/support/clustermanager/info/TransportClusterInfoAction.java b/server/src/main/java/org/opensearch/action/support/clustermanager/info/TransportClusterInfoAction.java
index 1411ff7b30695..c43256a61e8b4 100644
--- a/server/src/main/java/org/opensearch/action/support/clustermanager/info/TransportClusterInfoAction.java
+++ b/server/src/main/java/org/opensearch/action/support/clustermanager/info/TransportClusterInfoAction.java
@@ -88,6 +88,7 @@ protected final void clusterManagerOperation(final Request request, final Cluste
         doClusterManagerOperation(request, concreteIndices, state, listener);
     }
 
+    // TODO: Add abstract keyword after removing the deprecated doMasterOperation()
     protected void doClusterManagerOperation(
         Request request,
         String[] concreteIndices,
diff --git a/test/framework/src/main/java/org/opensearch/test/TestCluster.java b/test/framework/src/main/java/org/opensearch/test/TestCluster.java
index c2e90f0369e6c..478b692fb06ef 100644
--- a/test/framework/src/main/java/org/opensearch/test/TestCluster.java
+++ b/test/framework/src/main/java/org/opensearch/test/TestCluster.java
@@ -127,6 +127,7 @@ public void assertAfterTest() throws Exception {
     /**
      * Returns the number of data and cluster-manager eligible nodes in the cluster.
      */
+    // TODO: Add abstract keyword after removing the deprecated numDataAndMasterNodes()
     public int numDataAndClusterManagerNodes() {
         return numDataAndMasterNodes();
     }