diff --git a/dolphinscheduler-common/src/main/java/org/apache/dolphinscheduler/common/Constants.java b/dolphinscheduler-common/src/main/java/org/apache/dolphinscheduler/common/Constants.java
index 2240aa9b43..7460cebb5a 100644
--- a/dolphinscheduler-common/src/main/java/org/apache/dolphinscheduler/common/Constants.java
+++ b/dolphinscheduler-common/src/main/java/org/apache/dolphinscheduler/common/Constants.java
@@ -368,7 +368,7 @@ public final class Constants {
     /**
      * heartbeat threads number
      */
-    public static final int defaulWorkerHeartbeatThreadNum = 5;
+    public static final int defaulWorkerHeartbeatThreadNum = 1;
 
     /**
      * heartbeat interval
@@ -431,7 +431,7 @@ public final class Constants {
     /**
      * default master heartbeat thread number
      */
-    public static final int defaulMasterHeartbeatThreadNum = 5;
+    public static final int defaulMasterHeartbeatThreadNum = 1;
 
 
     /**