diff --git a/fe/fe-core/src/main/java/org/apache/doris/datasource/iceberg/IcebergMetadataOps.java b/fe/fe-core/src/main/java/org/apache/doris/datasource/iceberg/IcebergMetadataOps.java
index c1fbaee7fee7f8..87aaca90b95dff 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/datasource/iceberg/IcebergMetadataOps.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/datasource/iceberg/IcebergMetadataOps.java
@@ -87,16 +87,12 @@ public boolean databaseExist(String dbName) {
 
     public List<String> listDatabaseNames() {
         try {
-            preExecutionAuthenticator.execute(() -> {
-                return nsCatalog.listNamespaces().stream()
-                        .map(Namespace::toString)
-                        .collect(Collectors.toList());
-
-            });
+            return preExecutionAuthenticator.execute(() -> nsCatalog.listNamespaces().stream()
+                   .map(Namespace::toString)
+                   .collect(Collectors.toList()));
         } catch (Exception e) {
             throw new RuntimeException("Failed to list database names, error message is: " + e.getMessage());
         }
-        return new ArrayList<>();
     }