Use TransportVersion V9

Author: arteam

server/src/main/java/org/elasticsearch/TransportVersions.java

@@ -173,6 +173,7 @@ static TransportVersion def(int id) {
     public static final TransportVersion INFERENCE_REQUEST_ADAPTIVE_RATE_LIMITING = def(8_839_0_00);
     public static final TransportVersion ML_INFERENCE_IBM_WATSONX_RERANK_ADDED = def(8_840_0_00);
     public static final TransportVersion ELASTICSEARCH_9_0 = def(9_000_0_00);
+    public static final TransportVersion REMOVE_DESIRED_NODE_VERSION = def(9_000_0_01);
 
     /*
      * STOP! READ THIS FIRST! No, really,

server/src/main/java/org/elasticsearch/cluster/metadata/DesiredNode.java

@@ -162,8 +162,7 @@ public static DesiredNode readFrom(StreamInput in) throws IOException {
         }
         final var memory = ByteSizeValue.readFrom(in);
         final var storage = ByteSizeValue.readFrom(in);
-        // if (in.getTransportVersion().before(TransportVersion.V_9_00_0)) {
-        if (true) {
+        if (in.getTransportVersion().before(TransportVersions.REMOVE_DESIRED_NODE_VERSION)) {
             final String version;
             if (in.getTransportVersion().onOrAfter(TransportVersions.V_8_13_0)) {
                 version = in.readOptionalString();
@@ -187,8 +186,7 @@ public void writeTo(StreamOutput out) throws IOException {
         }
         memory.writeTo(out);
         storage.writeTo(out);
-        // if (out.getTransportVersion().before(TransportVersion.V_9_00_0)) {
-        if (true) {
+        if (out.getTransportVersion().before(TransportVersions.REMOVE_DESIRED_NODE_VERSION)) {
             if (out.getTransportVersion().onOrAfter(TransportVersions.V_8_13_0)) {
                 out.writeOptionalString(null);
             } else {