diff --git a/infra/common/src/main/java/org/apache/shardingsphere/infra/metadata/ShardingSphereMetaData.java b/infra/common/src/main/java/org/apache/shardingsphere/infra/metadata/ShardingSphereMetaData.java
index 79102546f1330..edc56a025b2ec 100644
--- a/infra/common/src/main/java/org/apache/shardingsphere/infra/metadata/ShardingSphereMetaData.java
+++ b/infra/common/src/main/java/org/apache/shardingsphere/infra/metadata/ShardingSphereMetaData.java
@@ -103,8 +103,7 @@ public void addDatabase(final String databaseName, final DatabaseType protocolTy
      * @param databaseName database name
      */
     public void dropDatabase(final String databaseName) {
-        ShardingSphereDatabase toBeRemovedDatabase = databases.remove(databaseName.toLowerCase());
-        closeResources(toBeRemovedDatabase);
+        closeResources(databases.remove(databaseName.toLowerCase()));
     }
     
     private void closeResources(final ShardingSphereDatabase database) {