Spring异步方法休眠失效：为何多线程下异步缓存方法延迟5秒且无法休眠？

import java.util.concurrent.Executor;
import java.util.concurrent.ThreadPoolExecutor;

import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.AsyncConfigurer;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

@Configuration
@EnableAsync
public class CustomAsyncConfiguration implements AsyncConfigurer {

    @Override
    public Executor getAsyncExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        // 配置线程池参数，例如核心线程数、最大线程数、队列大小等
        executor.setCorePoolSize(5);
        executor.setMaxPoolSize(10);
        executor.setQueueCapacity(25);
        executor.setKeepAliveSeconds(60);
        executor.setThreadNamePrefix("Async-");
        executor.setAllowCoreThreadTimeOut(true); // 关键：允许核心线程超时
        executor.initialize();
        return executor;
    }
}

import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;

import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Service;

@Service
public class AsyncService {

    private final ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(1);

    @Async
    public void asyncMethod() {
        // 异步任务逻辑
    }

    public void scheduleAsyncMethod() {
        scheduler.schedule(this::asyncMethod, 5, TimeUnit.SECONDS);
    }
}