diff --git a/apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/service/ClusterService.java b/apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/service/ClusterService.java
index e357d243c0169e052db2be1062a574ec833e8afd..511c13a702d771a3281f4050b5c653f0e64e2937 100644
--- a/apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/service/ClusterService.java
+++ b/apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/service/ClusterService.java
@@ -22,7 +22,7 @@ public class ClusterService {
 
   public ClusterDTO createCluster(Env env, ClusterDTO cluster){
     if (!clusterAPI.isClusterUnique(cluster.getAppId(), env, cluster.getName())){
-      throw new BadRequestException(String.format("cluster %s already exist.", cluster.getName()));
+      throw new BadRequestException(String.format("cluster %s already exists.", cluster.getName()));
     }
     return clusterAPI.createOrUpdate(env, cluster);
   }