Handle version during repository registration for prefix mode verification (#16831)

Signed-off-by: Ashish Singh <[email protected]>

Author: ashking94

server/src/main/java/org/opensearch/cluster/service/ClusterApplierService.java

@@ -233,6 +233,13 @@ public ClusterState state() {
         return clusterState;
     }
 
+    /**
+     * Returns true if the appliedClusterState is not null
+     */
+    public boolean isStateInitialised() {
+        return this.state.get() != null;
+    }
+
     /**
      * Returns true if the appliedClusterState is not null
      */

server/src/main/java/org/opensearch/cluster/service/ClusterService.java

@@ -183,6 +183,13 @@ public ClusterState state() {
         return clusterApplierService.state();
     }
 
+    /**
+     * Returns true if the state in appliedClusterState is not null
+     */
+    public boolean isStateInitialised() {
+        return clusterApplierService.isStateInitialised();
+    }
+
     /**
      * The state that is persisted to store but may not be applied to cluster.
      * @return ClusterState

server/src/main/java/org/opensearch/repositories/blobstore/BlobStoreRepository.java

@@ -2994,7 +2994,12 @@ public String startVerification() {
      */
     private BlobContainer testContainer(String seed) {
         BlobPath testBlobPath;
-        if (prefixModeVerification == true) {
+
+        if (prefixModeVerification == true
+            && (clusterService.isStateInitialised() == false
+                || clusterService.state().nodes().getMinNodeVersion().onOrAfter(Version.V_2_17_0))) {
+            // During the remote store node bootstrap, the cluster state is not initialised
+            // Otherwise, the cluster state is initialised and available with the min node version information
             PathInput pathInput = PathInput.builder().basePath(basePath()).indexUUID(seed).build();
             testBlobPath = PathType.HASHED_PREFIX.path(pathInput, FNV_1A_COMPOSITE_1);
         } else {