diff --git a/pulsar-broker-common/src/main/java/org/apache/pulsar/bookie/rackawareness/IsolatedBookieEnsemblePlacementPolicy.java b/pulsar-broker-common/src/main/java/org/apache/pulsar/bookie/rackawareness/IsolatedBookieEnsemblePlacementPolicy.java
index 37ea5632e5ca7..9062c25a21ce0 100644
--- a/pulsar-broker-common/src/main/java/org/apache/pulsar/bookie/rackawareness/IsolatedBookieEnsemblePlacementPolicy.java
+++ b/pulsar-broker-common/src/main/java/org/apache/pulsar/bookie/rackawareness/IsolatedBookieEnsemblePlacementPolicy.java
@@ -197,7 +197,8 @@ private Set<BookieId> getBlacklistedBookiesWithIsolationGroups(int ensembleSize,
         try {
             if (bookieMappingCache != null) {
                 Optional<BookiesRackConfiguration> optional =
-                        bookieMappingCache.get(BookieRackAffinityMapping.BOOKIE_INFO_ROOT_PATH).get(30, TimeUnit.SECONDS);
+                        bookieMappingCache.get(BookieRackAffinityMapping.BOOKIE_INFO_ROOT_PATH)
+                                .get(30, TimeUnit.SECONDS);
                 if (!optional.isPresent()) {
                     throw new KeeperException.NoNodeException(ZkBookieRackAffinityMapping.BOOKIE_INFO_ROOT_PATH);
                 }