diff --git a/fe/src/main/java/org/apache/doris/PaloFe.java b/fe/src/main/java/org/apache/doris/PaloFe.java
index b44185f50f1270..028af1920bf07b 100644
--- a/fe/src/main/java/org/apache/doris/PaloFe.java
+++ b/fe/src/main/java/org/apache/doris/PaloFe.java
@@ -256,6 +256,7 @@ private static boolean createAndLockPidFile(String pidFilePath) throws IOExcepti
             pid.deleteOnExit();
 
             String name = ManagementFactory.getRuntimeMXBean().getName();
+            file.setLength(0);
             file.write(name.split("@")[0].getBytes(Charsets.UTF_8));
 
             return true;