关于#关闭服务器，数据库线程未关闭#的问题，如何解决？

Question

sts开启服务器后直接关闭是正常的，一旦中间有了数据库的操作之后，在关闭就会提示两个警告，MySQL Statement Cancellation Timer和HikariPool-1 housekeeper的线程没有关闭。
The web application [ROOT] appears to have started a thread named [HikariPool-1 housekeeper] but has failed to stop it. This is very likely to create a memory leak.
java.base@17.0.7/jdk.internal.misc.Unsafe.park(Native Method)
java.base@17.0.7/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:252)
java.base@17.0.7/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:1672) java.base@17.0.7/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1182)
**java.base@17.0.7/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:899)
java.base@17.0.7/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1062)
java.base@17.0.7/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1122)
java.base@17.0.7/java.util.concurrent.ThreadPoolExecutor$**Worker.run(ThreadPoolExecutor.java:635)

The web application [ROOT] appears to have started a thread named [MySQL Statement Cancellation Timer] but has failed to stop it. This is very likely to create a memory leak.
java.base@17.0.7/java.lang.Object.wait(Native Method)
java.base@17.0.7/java.util.TimerThread.mainLoop(Timer.java:563)
java.base@17.0.7/java.util.TimerThread.run(Timer.java:516)

我只用了这些，没有额外用别的连接池，tomcat是sts自己带的

自学的，不知道描述的是不是清楚， 这个怎么办呢？

Answer 1

在关闭STS服务器时出现MySQL Statement Cancellation Timer和HikariPool-1 housekeeper的线程没有关闭的警告是正常的。
因为在进行数据库操作时，可能会创建一些后台线程或定时器，这些线程或定时器在关闭服务器时可能无法立即停止。
但是这并不会对数据库或应用程序造成任何影响，只是提示一些后台线程或定时器没有被正确关闭而已。
如果担心这些警告会影响应用程序的正常运行，可以手动停止这些线程或定时器，或者等待一段时间让它们自动停止。