diff --git a/hugegraph-core/src/main/java/org/apache/hugegraph/util/ConfigUtil.java b/hugegraph-core/src/main/java/org/apache/hugegraph/util/ConfigUtil.java
index 6e080faed2..7607cc4a55 100644
--- a/hugegraph-core/src/main/java/org/apache/hugegraph/util/ConfigUtil.java
+++ b/hugegraph-core/src/main/java/org/apache/hugegraph/util/ConfigUtil.java
@@ -118,7 +118,8 @@ public static String writeToFile(String dir, String graphName,
         String tmpGraphName = graphName + CONF_SUFFIX;
         String fileName = Paths.get(dir, tmpGraphName).toString();
         try {
-            config.save(new File(fileName));
+            File newFile = new File(fileName);
+            config.save(newFile);
             LOG.info("Write HugeConfig to file: '{}'", fileName);
         } catch (ConfigurationException e) {
             throw new HugeException("Failed to write HugeConfig to file '%s'",