diff --git a/server/src/main/java/org/opensearch/action/admin/indices/searchonly/SearchOnlyRequestBuilder.java b/server/src/main/java/org/opensearch/action/admin/indices/searchonly/SearchOnlyRequestBuilder.java
index 72152da8dde0c..1ee4552390c72 100644
--- a/server/src/main/java/org/opensearch/action/admin/indices/searchonly/SearchOnlyRequestBuilder.java
+++ b/server/src/main/java/org/opensearch/action/admin/indices/searchonly/SearchOnlyRequestBuilder.java
@@ -2,8 +2,8 @@
 
 import org.opensearch.action.ActionRequestBuilder;
 import org.opensearch.action.support.clustermanager.AcknowledgedResponse;
-import org.opensearch.client.OpenSearchClient;
 import org.opensearch.common.annotation.PublicApi;
+import org.opensearch.transport.client.OpenSearchClient;
 
 @PublicApi(since = "1.0.0")
 public class SearchOnlyRequestBuilder extends ActionRequestBuilder<SearchOnlyRequest, AcknowledgedResponse> {
diff --git a/server/src/main/java/org/opensearch/action/admin/indices/shards/TransportIndicesShardStoresAction.java b/server/src/main/java/org/opensearch/action/admin/indices/shards/TransportIndicesShardStoresAction.java
index 1a3c657f5b1b8..fad504a476511 100644
--- a/server/src/main/java/org/opensearch/action/admin/indices/shards/TransportIndicesShardStoresAction.java
+++ b/server/src/main/java/org/opensearch/action/admin/indices/shards/TransportIndicesShardStoresAction.java
@@ -146,7 +146,7 @@ protected void clusterManagerOperation(
             final String customDataPath = IndexMetadata.INDEX_DATA_PATH_SETTING.get(state.metadata().index(index).getSettings());
             for (IndexShardRoutingTable routing : indexShardRoutingTables) {
                 final int shardId = routing.shardId().id();
-                ClusterShardHealth shardHealth = new ClusterShardHealth(shardId, routing);
+                ClusterShardHealth shardHealth = new ClusterShardHealth(shardId, routing, state.metadata().index(index));
                 if (request.shardStatuses().contains(shardHealth.getStatus())) {
                     shardsToFetch.add(Tuple.tuple(routing.shardId(), customDataPath));
                 }
diff --git a/server/src/main/java/org/opensearch/cluster/health/ClusterIndexHealth.java b/server/src/main/java/org/opensearch/cluster/health/ClusterIndexHealth.java
index e38f90fd45e00..6815ee92039be 100644
--- a/server/src/main/java/org/opensearch/cluster/health/ClusterIndexHealth.java
+++ b/server/src/main/java/org/opensearch/cluster/health/ClusterIndexHealth.java
@@ -156,7 +156,7 @@ public ClusterIndexHealth(final IndexMetadata indexMetadata, final IndexRoutingT
         shards = new HashMap<>();
         for (IndexShardRoutingTable shardRoutingTable : indexRoutingTable) {
             int shardId = shardRoutingTable.shardId().id();
-            shards.put(shardId, new ClusterShardHealth(shardId, shardRoutingTable));
+            shards.put(shardId, new ClusterShardHealth(shardId, shardRoutingTable, indexMetadata));
         }
 
         // update the index status
@@ -218,7 +218,7 @@ public ClusterIndexHealth(
         if (isShardLevelHealthRequired) {
             for (IndexShardRoutingTable indexShardRoutingTable : indexRoutingTable) {
                 int shardId = indexShardRoutingTable.shardId().id();
-                ClusterShardHealth shardHealth = new ClusterShardHealth(shardId, indexShardRoutingTable);
+                ClusterShardHealth shardHealth = new ClusterShardHealth(shardId, indexShardRoutingTable, indexMetadata);
                 if (shardHealth.isPrimaryActive()) {
                     computeActivePrimaryShards++;
                 }
@@ -268,7 +268,8 @@ public ClusterIndexHealth(
                     ClusterHealthStatus shardHealth = ClusterShardHealth.getShardHealth(
                         primaryShard,
                         activeShardsPerShardId,
-                        shardRoutingCountPerShardId
+                        shardRoutingCountPerShardId,
+                        indexMetadata
                     );
                     computeStatus = getIndexHealthStatus(shardHealth, computeStatus);
                 }
diff --git a/server/src/main/java/org/opensearch/cluster/health/ClusterShardHealth.java b/server/src/main/java/org/opensearch/cluster/health/ClusterShardHealth.java
index 1ba99cf7a98f0..1fb72d95b61e4 100644
--- a/server/src/main/java/org/opensearch/cluster/health/ClusterShardHealth.java
+++ b/server/src/main/java/org/opensearch/cluster/health/ClusterShardHealth.java
@@ -32,6 +32,7 @@
 
 package org.opensearch.cluster.health;
 
+import org.opensearch.cluster.metadata.IndexMetadata;
 import org.opensearch.cluster.routing.IndexShardRoutingTable;
 import org.opensearch.cluster.routing.RecoverySource;
 import org.opensearch.cluster.routing.ShardRouting;
@@ -113,7 +114,7 @@ public final class ClusterShardHealth implements Writeable, ToXContentFragment {
     private int delayedUnassignedShards;
     private final boolean primaryActive;
 
-    public ClusterShardHealth(final int shardId, final IndexShardRoutingTable shardRoutingTable) {
+    public ClusterShardHealth(final int shardId, final IndexShardRoutingTable shardRoutingTable, final IndexMetadata indexMetadata) {
         this.shardId = shardId;
         int computeActiveShards = 0;
         int computeRelocatingShards = 0;
@@ -139,13 +140,13 @@ public ClusterShardHealth(final int shardId, final IndexShardRoutingTable shardR
             }
         }
         final ShardRouting primaryRouting = shardRoutingTable.primaryShard();
-        this.status = getShardHealth(primaryRouting, computeActiveShards, shardRoutingTable.size());
+        this.status = getShardHealth(primaryRouting, computeActiveShards, shardRoutingTable.size(), indexMetadata);
         this.activeShards = computeActiveShards;
         this.relocatingShards = computeRelocatingShards;
         this.initializingShards = computeInitializingShards;
         this.unassignedShards = computeUnassignedShards;
         this.delayedUnassignedShards = computeDelayedUnassignedShards;
-        this.primaryActive = primaryRouting.active();
+        this.primaryActive = primaryRouting != null && primaryRouting.active();
     }
 
     public ClusterShardHealth(final StreamInput in) throws IOException {
@@ -230,16 +231,23 @@ public void writeTo(final StreamOutput out) throws IOException {
      *     Shard health is RED when the primary is not active.
      * </p>
      */
-    public static ClusterHealthStatus getShardHealth(final ShardRouting primaryRouting, final int activeShards, final int totalShards) {
-        // TO DO
-        // assert primaryRouting != null : "Primary shard routing can't be null";
+    public static ClusterHealthStatus getShardHealth(final ShardRouting primaryRouting, final int activeShards, final int totalShards, final IndexMetadata indexMetadata) {
+        if (primaryRouting == null) {
+            boolean isSearchOnlyEnabled = indexMetadata.getSettings()
+                .getAsBoolean(IndexMetadata.INDEX_BLOCKS_SEARCH_ONLY_SETTING.getKey(), false);
+            return isSearchOnlyEnabled ? ClusterHealthStatus.GREEN : ClusterHealthStatus.RED;
+        }
+
         if (primaryRouting.active()) {
+            // If primary is active, check if all replicas are active
             if (activeShards == totalShards) {
                 return ClusterHealthStatus.GREEN;
             } else {
+                // Primary is active but some replicas are not
                 return ClusterHealthStatus.YELLOW;
             }
         } else {
+            // Primary is not active, determine health based on recovery state
             return getInactivePrimaryHealth(primaryRouting);
         }
     }
diff --git a/server/src/main/java/org/opensearch/rest/action/admin/indices/RestSearchonlyAction.java b/server/src/main/java/org/opensearch/rest/action/admin/indices/RestSearchonlyAction.java
index cb103197ce22c..55696ca6deb4d 100644
--- a/server/src/main/java/org/opensearch/rest/action/admin/indices/RestSearchonlyAction.java
+++ b/server/src/main/java/org/opensearch/rest/action/admin/indices/RestSearchonlyAction.java
@@ -1,10 +1,10 @@
 package org.opensearch.rest.action.admin.indices;
 
-import org.opensearch.client.node.NodeClient;
 import org.opensearch.core.common.Strings;
 import org.opensearch.rest.BaseRestHandler;
 import org.opensearch.rest.RestRequest;
 import org.opensearch.rest.action.RestToXContentListener;
+import org.opensearch.transport.client.node.NodeClient;
 
 import java.util.List;