系统存在两个Scheduled定时任务,其中一个执行失败?

两个Scheduled几乎同一时间执行.如果某一个定时任务执行时间比较长,会导致另一个任务执行失败?

根本问题是Scheduled是单线程执行任务的

	//出问题代码
  @Scheduled(cron = "0/5 * * * * ?")
    public void test1() throws InterruptedException {
        Thread.sleep(10000);  //模拟复杂任务
        log.info("定时任务1: 当前线程 {}", Thread.currentThread().getName());
    }


  @Scheduled(cron = "0/5 * * * * ?")
  public void test2() throws InterruptedException {
      Thread.sleep(10000);  //模拟复杂任务
      log.info("定时任务2,当前线程 {}", Thread.currentThread().getName());
  }

启动异步线程池来解决问题:

1.定义线程池

@Configuration
@Slf4j
public class AsyncThreadPoolConfig {

    @Bean("asyncThreadPoolTaskExecuter")
    public Executor ThreadPoolTaskExecuter() {
        int coreNum = Runtime.getRuntime().availableProcessors();
        log.info("cpu数量 {}", coreNum);
        ThreadPoolTaskExecutor threadPoolExecutor = new ThreadPoolTaskExecutor();
        threadPoolExecutor.setCorePoolSize(coreNum);
        threadPoolExecutor.setThreadNamePrefix("aysc_thread_");
        threadPoolExecutor.setMaxPoolSize(2*coreNum);
        threadPoolExecutor.setQueueCapacity(20);
        threadPoolExecutor.setKeepAliveSeconds(10);
        threadPoolExecutor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        return threadPoolExecutor;
    }
}

2.springBoot启动类注解

@EnableAsync    //  开启异步请求注解
@EnableScheduling

3.业务代码

 	@Scheduled(cron = "0/5 * * * * ?")
    @Async("asyncThreadPoolTaskExecuter")
    public void test1() throws InterruptedException {
        Thread.sleep(10000);  //模拟复杂任务
        log.info("定时任务1: 当前线程 {}", Thread.currentThread().getName());
    }


  @Scheduled(cron = "0/5 * * * * ?")
  @Async("asyncThreadPoolTaskExecuter")
  public void test2() throws InterruptedException {
      Thread.sleep(10000);  //模拟复杂任务
      log.info("定时任务2,当前线程 {}", Thread.currentThread().getName());
  }