diff --git a/hippo4j-core/src/main/java/cn/hippo4j/core/executor/ThreadPoolNotifyAlarmHandler.java b/hippo4j-core/src/main/java/cn/hippo4j/core/executor/ThreadPoolNotifyAlarmHandler.java
index 9be4062f31..e4fb1c11cf 100644
--- a/hippo4j-core/src/main/java/cn/hippo4j/core/executor/ThreadPoolNotifyAlarmHandler.java
+++ b/hippo4j-core/src/main/java/cn/hippo4j/core/executor/ThreadPoolNotifyAlarmHandler.java
@@ -167,7 +167,7 @@ public void checkPoolRejectedAlarm(String threadPoolId, ThreadPoolExecutor threa
      */
     public void asyncSendExecuteTimeOutAlarm(String threadPoolId, long executeTime, long executeTimeOut, ThreadPoolExecutor threadPoolExecutor) {
         ThreadPoolNotifyAlarm threadPoolNotifyAlarm = GlobalNotifyAlarmManage.get(threadPoolId);
-        if (!threadPoolNotifyAlarm.getIsAlarm()) {
+        if (Objects.isNull(threadPoolNotifyAlarm) || !threadPoolNotifyAlarm.getIsAlarm()) {
             return;
         }