diff --git a/designer-base/src/main/java/com/fr/design/carton/CartonUtils.java b/designer-base/src/main/java/com/fr/design/carton/CartonUtils.java
index b67fe8c504..df8361662b 100644
--- a/designer-base/src/main/java/com/fr/design/carton/CartonUtils.java
+++ b/designer-base/src/main/java/com/fr/design/carton/CartonUtils.java
@@ -116,10 +116,10 @@ public class CartonUtils {
                 }
                 file.createNewFile();
             }
-            BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(file, true));
-            String outputMessage = message.replaceAll("~", "\r\n") + "," + "\r\n";
-            bufferedWriter.write(outputMessage);
-            bufferedWriter.close();
+            try (BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(file, true))) {
+                String outputMessage = message.replaceAll("~", "\r\n") + "," + "\r\n";
+                bufferedWriter.write(outputMessage);
+            }
         } catch (IOException e) {
             FineLoggerFactory.getLogger().error("output fail", e);
         }
diff --git a/designer-base/src/main/java/com/fr/design/carton/latency/DesignerLatencyMetric.java b/designer-base/src/main/java/com/fr/design/carton/latency/DesignerLatencyMetric.java
index d98e26c198..766ff17dba 100644
--- a/designer-base/src/main/java/com/fr/design/carton/latency/DesignerLatencyMetric.java
+++ b/designer-base/src/main/java/com/fr/design/carton/latency/DesignerLatencyMetric.java
@@ -92,8 +92,12 @@ public class DesignerLatencyMetric {
      */
     public void stop() {
         if (SwitchForSwingChecker.isLatencyMonitoring()) {
-            this.executorService.shutdown();
-            this.scheduler.shutdown();
+            if (this.executorService != null) {
+                this.executorService.shutdown();
+            }
+            if (this.scheduler != null) {
+                this.scheduler.shutdown();
+            }
             collectAndSubmit();
         }
     }