diff --git a/server/src/main/java/org/opensearch/indices/IndicesRequestCache.java b/server/src/main/java/org/opensearch/indices/IndicesRequestCache.java
index 269d27e43fb50..abc77bb19a312 100644
--- a/server/src/main/java/org/opensearch/indices/IndicesRequestCache.java
+++ b/server/src/main/java/org/opensearch/indices/IndicesRequestCache.java
@@ -108,6 +108,10 @@ public final class IndicesRequestCache implements RemovalListener<IndicesRequest
      * A setting to enable or disable request caching on an index level. Its dynamic by default
      * since we are checking on the cluster state IndexMetadata always.
      */
+    public static final String SETTING_INDICES_REQUEST_CACHE_STALENESS_THRESHOLD_SETTING =
+        "indices.requests.cache.cleanup.staleness_threshold";
+    public static final String SETTING_INDICES_REQUEST_CACHE_CLEAN_INTERVAL_SETTING = "indices.requests.cache.cleanup.interval";
+
     public static final Setting<Boolean> INDEX_CACHE_REQUEST_ENABLED_SETTING = Setting.boolSetting(
         "index.requests.cache.enable",
         true,
@@ -125,12 +129,12 @@ public final class IndicesRequestCache implements RemovalListener<IndicesRequest
         Property.NodeScope
     );
     public static final Setting<TimeValue> INDICES_REQUEST_CACHE_CLEAN_INTERVAL_SETTING = Setting.positiveTimeSetting(
-        "indices.requests.cache.cleanup.interval",
+        SETTING_INDICES_REQUEST_CACHE_CLEAN_INTERVAL_SETTING,
         INDICES_CACHE_CLEAN_INTERVAL_SETTING,
         Property.NodeScope
     );
     public static final Setting<String> INDICES_REQUEST_CACHE_STALENESS_THRESHOLD_SETTING = new Setting<>(
-        "indices.requests.cache.cleanup.staleness_threshold",
+        SETTING_INDICES_REQUEST_CACHE_STALENESS_THRESHOLD_SETTING,
         "0%",
         IndicesRequestCache::validateStalenessSetting,
         Property.Dynamic,
@@ -452,7 +456,7 @@ class IndicesRequestCacheCleanupManager implements Closeable {
         private final Set<CleanupKey> keysToClean;
         private final ConcurrentMap<ShardId, HashMap<String, Integer>> cleanupKeyToCountMap;
         private final AtomicInteger staleKeysCount;
-        private double stalenessThreshold;
+        private volatile double stalenessThreshold;
         private final IndicesRequestCacheCleaner cacheCleaner;
 
         IndicesRequestCacheCleanupManager(ThreadPool threadpool, TimeValue cleanInterval, double stalenessThreshold) {