diff --git a/dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/service/impl/TaskInstanceServiceImpl.java b/dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/service/impl/TaskInstanceServiceImpl.java
index ab53c58878..e25cde6bc2 100644
--- a/dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/service/impl/TaskInstanceServiceImpl.java
+++ b/dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/service/impl/TaskInstanceServiceImpl.java
@@ -143,8 +143,9 @@ public class TaskInstanceServiceImpl extends BaseServiceImpl implements TaskInst
         Map<Integer, User> userMap = users.stream().collect(Collectors.toMap(User::getId, v -> v));
         for (TaskInstance taskInstance : taskInstanceList) {
             taskInstance.setDuration(DateUtils.format2Duration(taskInstance.getStartTime(), taskInstance.getEndTime()));
-            if (userMap.containsKey(taskInstance.getExecutorId())) {
-                taskInstance.setExecutorName(userMap.get(taskInstance.getExecutorId()).getUserName());
+            User user = userMap.get(taskInstance.getExecutorId());
+            if (user != null) {
+                taskInstance.setExecutorName(user.getUserName());
             }
         }
         pageInfo.setTotal((int) taskInstanceIPage.getTotal());
diff --git a/dolphinscheduler-common/src/main/java/org/apache/dolphinscheduler/common/utils/CollectionUtils.java b/dolphinscheduler-common/src/main/java/org/apache/dolphinscheduler/common/utils/CollectionUtils.java
index 295fb776f4..a48ed1f29d 100644
--- a/dolphinscheduler-common/src/main/java/org/apache/dolphinscheduler/common/utils/CollectionUtils.java
+++ b/dolphinscheduler-common/src/main/java/org/apache/dolphinscheduler/common/utils/CollectionUtils.java
@@ -78,9 +78,6 @@ public class CollectionUtils {
      */
     public static <T extends Object> List<Map<String, Object>> getListByExclusion(List<T> originList, Set<String> exclusionSet) {
         List<Map<String, Object>> instanceList = new ArrayList<>();
-        if (exclusionSet == null) {
-            exclusionSet = new HashSet<>();
-        }
         if (originList == null) {
             return instanceList;
         }
@@ -89,7 +86,7 @@ public class CollectionUtils {
             BeanMap beanMap = new BeanMap(instance);
             instanceMap = new LinkedHashMap<>(16, 0.75f, true);
             for (Map.Entry<Object, Object> entry : beanMap.entrySet()) {
-                if (exclusionSet.contains(entry.getKey())) {
+                if (exclusionSet != null && exclusionSet.contains(entry.getKey())) {
                     continue;
                 }
                 instanceMap.put((String) entry.getKey(), entry.getValue());