diff --git a/dolphinscheduler-common/src/main/java/org/apache/dolphinscheduler/common/utils/ResInfo.java b/dolphinscheduler-common/src/main/java/org/apache/dolphinscheduler/common/utils/ResInfo.java
index e0cea1d7e0..aa8d44fa42 100644
--- a/dolphinscheduler-common/src/main/java/org/apache/dolphinscheduler/common/utils/ResInfo.java
+++ b/dolphinscheduler-common/src/main/java/org/apache/dolphinscheduler/common/utils/ResInfo.java
@@ -15,7 +15,6 @@
  * limitations under the License.
  */
 package org.apache.dolphinscheduler.common.utils;
-
 import org.apache.dolphinscheduler.common.Constants;
 import org.apache.dolphinscheduler.common.model.Server;
 
@@ -135,14 +134,15 @@ public class ResInfo {
      * @return heartbeat info to Server
      */
     public static Server parseHeartbeatForZKInfo(String heartBeatInfo){
-        Server masterServer =  null;
+        if (StringUtils.isEmpty(heartBeatInfo)) {
+            return null;
+        }
         String[] masterArray = heartBeatInfo.split(Constants.COMMA);
-        if(masterArray == null ||
-                masterArray.length != Constants.HEARTBEAT_FOR_ZOOKEEPER_INFO_LENGTH){
-            return masterServer;
+        if(masterArray.length != Constants.HEARTBEAT_FOR_ZOOKEEPER_INFO_LENGTH){
+            return null;
 
         }
-        masterServer = new Server();
+        Server masterServer = new Server();
         masterServer.setHost(masterArray[0]);
         masterServer.setPort(Integer.parseInt(masterArray[1]));
         masterServer.setResInfo(getResInfoJson(Double.parseDouble(masterArray[2]),
diff --git a/dolphinscheduler-common/src/main/java/org/apache/dolphinscheduler/common/utils/ArrayUtils.java b/dolphinscheduler-common/src/test/java/org/apache/dolphinscheduler/common/utils/ResInfoTest.java
similarity index 54%
rename from dolphinscheduler-common/src/main/java/org/apache/dolphinscheduler/common/utils/ArrayUtils.java
rename to dolphinscheduler-common/src/test/java/org/apache/dolphinscheduler/common/utils/ResInfoTest.java
index 163c56bbcc..1e1b154d93 100644
--- a/dolphinscheduler-common/src/main/java/org/apache/dolphinscheduler/common/utils/ArrayUtils.java
+++ b/dolphinscheduler-common/src/test/java/org/apache/dolphinscheduler/common/utils/ResInfoTest.java
@@ -14,13 +14,30 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-
 package org.apache.dolphinscheduler.common.utils;
 
+import org.junit.Assert;
+import org.junit.Test;
+import java.util.Date;
+import org.apache.dolphinscheduler.common.model.Server;
+
+public class ResInfoTest {
+    @Test
+    public void testGetHeartBeatInfo() {
+        String info = ResInfo.getHeartBeatInfo(new Date());
+        Assert.assertEquals(info.split(",").length, 7);
+    }
 
-public class ArrayUtils {
+    @Test
+    public void testParseHeartbeatForZKInfo() {
+        //normal info
+        String info = ResInfo.getHeartBeatInfo(new Date());
+        Server s = ResInfo.parseHeartbeatForZKInfo(info);
+        Assert.assertNotNull(s);
+        Assert.assertNotNull(s.getResInfo());
 
-  public static boolean isEmpty(final int[] array) {
-    return array == null || array.length == 0;
-  }
+        //null param
+        s = ResInfo.parseHeartbeatForZKInfo(null);
+        Assert.assertNull(s);
+    }
 }