diff --git a/pulsar-broker-common/src/main/java/org/apache/pulsar/bookie/rackawareness/BookieRackAffinityMapping.java b/pulsar-broker-common/src/main/java/org/apache/pulsar/bookie/rackawareness/BookieRackAffinityMapping.java
index 0ba4f5080e606c..bfb47ff50acb80 100644
--- a/pulsar-broker-common/src/main/java/org/apache/pulsar/bookie/rackawareness/BookieRackAffinityMapping.java
+++ b/pulsar-broker-common/src/main/java/org/apache/pulsar/bookie/rackawareness/BookieRackAffinityMapping.java
@@ -124,11 +124,10 @@ public synchronized void setConf(Configuration conf) {
         store.registerListener(this::handleUpdates);
 
         try {
-            var racksWithHost = bookieMappingCache.get(BOOKIE_INFO_ROOT_PATH)
+            BookiesRackConfiguration racksWithHost = bookieMappingCache.get(BOOKIE_INFO_ROOT_PATH)
                     .thenApply(optRes -> optRes.orElseGet(BookiesRackConfiguration::new))
                     .get();
-
-            for (var bookieMapping : racksWithHost.values()) {
+            for (Map<String, BookieInfo> bookieMapping : racksWithHost.values()) {
                 for (String address : bookieMapping.keySet()) {
                     bookieAddressListLastTime.add(BookieId.parse(address));
                 }