diff --git a/dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/service/ProcessInstanceService.java b/dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/service/ProcessInstanceService.java
index 05cb9d5830458f70162cd57985dd6b072016c7e5..2239646787d3f7614c5c150890527d1037faadbc 100644
--- a/dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/service/ProcessInstanceService.java
+++ b/dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/service/ProcessInstanceService.java
@@ -194,7 +194,11 @@ public class ProcessInstanceService extends BaseDAGService {
                 project.getId(), processDefineId, searchVal, statusArray, host, start, end);
 
         for(ProcessInstance processInstance:processInstanceList.getRecords()){
-            processInstance.setDuration(DateUtils.differSec(processInstance.getStartTime(),processInstance.getEndTime()));
+            if (StringUtils.isNotEmpty(startDate)
+                    && StringUtils.isNotEmpty(endDate)){
+                processInstance.setDuration(DateUtils.differSec(processInstance.getStartTime(),processInstance.getEndTime()));
+            }
+
         }
 
         Set<String> exclusionSet = new HashSet<String>(){{
@@ -205,7 +209,7 @@ public class ProcessInstanceService extends BaseDAGService {
         }};
 
         PageInfo pageInfo = new PageInfo<ProcessInstance>(pageNo, pageSize);
-        pageInfo.setTotalCount((int)processInstanceList.getTotal());
+        pageInfo.setTotalCount((int) processInstanceList.getTotal());
         pageInfo.setLists(CollectionUtils.getListByExclusion(processInstanceList.getRecords(), exclusionSet));
         result.put(Constants.DATA_LIST, pageInfo);
         putMsg(result, Status.SUCCESS);
diff --git a/dolphinscheduler-server/src/main/java/org/apache/dolphinscheduler/server/zk/ZKMasterClient.java b/dolphinscheduler-server/src/main/java/org/apache/dolphinscheduler/server/zk/ZKMasterClient.java
index af2f25b9aa00cacfef4a6604ae4876bf40760cf5..758e29bd5ce0be9dc691d5a1cc9f075ec058a8e2 100644
--- a/dolphinscheduler-server/src/main/java/org/apache/dolphinscheduler/server/zk/ZKMasterClient.java
+++ b/dolphinscheduler-server/src/main/java/org/apache/dolphinscheduler/server/zk/ZKMasterClient.java
@@ -141,7 +141,7 @@ public class ZKMasterClient extends AbstractZKClient {
 	 */
 	public void initDao(){
 		this.alertDao = DaoFactory.getDaoInstance(AlertDao.class);
-		this.processDao = DaoFactory.getDaoInstance(ProcessDao.class);
+//		this.processDao = DaoFactory.getDaoInstance(ProcessDao.class);
 	}
 	/**
 	 * get alert dao