diff --git a/hugegraph-core/src/main/java/com/baidu/hugegraph/task/TaskCallable.java b/hugegraph-core/src/main/java/com/baidu/hugegraph/task/TaskCallable.java
index 11f75a6df8..bb21ac8554 100644
--- a/hugegraph-core/src/main/java/com/baidu/hugegraph/task/TaskCallable.java
+++ b/hugegraph-core/src/main/java/com/baidu/hugegraph/task/TaskCallable.java
@@ -126,15 +126,6 @@ protected void save() {
         }
     }
 
-    private static boolean needSaveWithEx(String message) {
-        for (String error : ERROR_MESSAGES) {
-            if (message.contains(error)) {
-                return true;
-            }
-        }
-        return false;
-    }
-
     protected void graph(HugeGraph graph) {
         this.graph = graph;
     }
@@ -165,6 +156,15 @@ public static <V> TaskCallable<V> fromClass(String className) {
         }
     }
 
+    private static boolean needSaveWithEx(String message) {
+        for (String error : ERROR_MESSAGES) {
+            if (message.contains(error)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
     public static <V> TaskCallable<V> empty(Exception e) {
         return new TaskCallable<V>() {
             @Override