diff --git a/mykit-concurrent-chapter19/src/main/java/io/binghe/concurrent/chapter19/task/UpdateLockTimeoutTask.java b/mykit-concurrent-chapter19/src/main/java/io/binghe/concurrent/chapter19/task/UpdateLockTimeoutTask.java
index a21593cc5d6d25b7ac4deb79539d65f125c7bacd..28df9cc5c9a45de6ecd40ddcb39f67d4dfe0dff8 100644
--- a/mykit-concurrent-chapter19/src/main/java/io/binghe/concurrent/chapter19/task/UpdateLockTimeoutTask.java
+++ b/mykit-concurrent-chapter19/src/main/java/io/binghe/concurrent/chapter19/task/UpdateLockTimeoutTask.java
@@ -27,6 +27,10 @@ public class UpdateLockTimeoutTask implements Runnable{
         //以传递的线程id为key，当前执行更新超时时间的线程为value，保存到redis中
         stringRedisTemplate.opsForValue().set(currentThreadId, String.valueOf(Thread.currentThread().getId()));
         while (true){
+            //线程停止 退出循环
+            if(Thread.interrupted()){
+                break;
+            }
             stringRedisTemplate.expire(key, 30, TimeUnit.SECONDS);
             try {
                 //每个10秒执行一次