2.x specific changes

Signed-off-by: Bharathwaj G <bharath78910@gmail.com>

CHANGELOG.md

@@ -5,6 +5,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 ## [Unreleased 2.x]
 ### Added
+- [Admission control] Add Resource usage collector service and resource usage tracker ([#9890](https://github.com/opensearch-project/OpenSearch/pull/9890))
 
 ### Dependencies
 - Bumps jetty version to 9.4.52.v20230823 to fix GMS-2023-1857 ([#9822](https://github.com/opensearch-project/OpenSearch/pull/9822))

server/src/main/java/org/opensearch/action/admin/cluster/node/stats/NodeStats.java

@@ -215,7 +215,7 @@ public NodeStats(StreamInput in) throws IOException {
         } else {
             searchPipelineStats = null;
         }
-        if (in.getVersion().onOrAfter(Version.V_3_0_0)) { // make it 2.12 when we backport
+        if (in.getVersion().onOrAfter(Version.V_2_12_0)) {
             resourceUsageStats = in.readOptionalWriteable(NodesResourceUsageStats::new);
         } else {
             resourceUsageStats = null;
@@ -465,7 +465,7 @@ public void writeTo(StreamOutput out) throws IOException {
         if (out.getVersion().onOrAfter(Version.V_2_9_0)) {
             out.writeOptionalWriteable(searchPipelineStats);
         }
-        if (out.getVersion().onOrAfter(Version.V_3_0_0)) { // make it 2.12 when we backport
+        if (out.getVersion().onOrAfter(Version.V_2_12_0)) {
             out.writeOptionalWriteable(resourceUsageStats);
         }
     }