Spring Boot利用@Async异步调用：ThreadPoolTaskScheduler线程池的优雅关闭详解

@SpringBootApplication
public class Application {
 public static void main(String[] args) {
 SpringApplication.run(Application.class, args);
 }

 @EnableAsync
 @Configuration
 class TaskPoolConfig {
 @Bean("taskExecutor")
 public Executor taskExecutor() {
  ThreadPoolTaskScheduler executor = new ThreadPoolTaskScheduler();
  executor.setPoolSize(20);
  executor.setThreadNamePrefix("taskExecutor-");
  return executor;
 }
 }
}

@Slf4j
@Component
public class Task {

 @Autowired
 private StringRedisTemplate stringRedisTemplate;
 @Async("taskExecutor")
 public void doTaskOne() throws Exception {
 log.info("开始做任务一");
 long start = System.currentTimeMillis();
 log.info(stringRedisTemplate.randomKey());
 long end = System.currentTimeMillis();
 log.info("完成任务一，耗时：" + (end - start) + "毫秒");
 }

 @Async("taskExecutor")
 public void doTaskTwo() throws Exception {
 log.info("开始做任务二");
 long start = System.currentTimeMillis();
 log.info(stringRedisTemplate.randomKey());
 long end = System.currentTimeMillis();
 log.info("完成任务二，耗时：" + (end - start) + "毫秒");
 }

 @Async("taskExecutor")
 public void doTaskThree() throws Exception {
 log.info("开始做任务三");
 long start = System.currentTimeMillis();
 log.info(stringRedisTemplate.randomKey());
 long end = System.currentTimeMillis();
 log.info("完成任务三，耗时：" + (end - start) + "毫秒");
 }
}

@RunWith(SpringJUnit4ClassRunner.class)
@SpringBootTest
public class ApplicationTests {
 @Autowired
 private Task task;
 @Test
 @SneakyThrows
 public void test() {
 for (int i = 0; i < 10000; i++) {
  task.doTaskOne();
  task.doTaskTwo();
  task.doTaskThree();

  if (i == 9999) {
  System.exit(0);
  }
 }
 }
}

org.springframework.data.redis.RedisConnectionFailureException: Cannot get Jedis connection; nested exception is redis.clients.jedis.exceptions.JedisConnectionException: Could not get a resource from the pool
 at org.springframework.data.redis.connection.jedis.JedisConnectionFactory.fetchJedisConnector(JedisConnectionFactory.java:204) ~[spring-data-redis-1.8.10.RELEASE.jar:na]
 at org.springframework.data.redis.connection.jedis.JedisConnectionFactory.getConnection(JedisConnectionFactory.java:348) ~[spring-data-redis-1.8.10.RELEASE.jar:na]
 at org.springframework.data.redis.core.RedisConnectionUtils.doGetConnection(RedisConnectionUtils.java:129) ~[spring-data-redis-1.8.10.RELEASE.jar:na]
 at org.springframework.data.redis.core.RedisConnectionUtils.getConnection(RedisConnectionUtils.java:92) ~[spring-data-redis-1.8.10.RELEASE.jar:na]
 at org.springframework.data.redis.core.RedisConnectionUtils.getConnection(RedisConnectionUtils.java:79) ~[spring-data-redis-1.8.10.RELEASE.jar:na]
 at org.springframework.data.redis.core.RedisTemplate.execute(RedisTemplate.java:194) ~[spring-data-redis-1.8.10.RELEASE.jar:na]
 at org.springframework.data.redis.core.RedisTemplate.execute(RedisTemplate.java:169) ~[spring-data-redis-1.8.10.RELEASE.jar:na]
 at org.springframework.data.redis.core.RedisTemplate.randomKey(RedisTemplate.java:781) ~[spring-data-redis-1.8.10.RELEASE.jar:na]
 at com.didispace.async.Task.doTaskOne(Task.java:26) ~[classes/:na]
 at com.didispace.async.Task$$FastClassBySpringCGLIB$$ca3ff9d6.invoke(<generated>) ~[classes/:na]
 at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204) ~[spring-core-4.3.14.RELEASE.jar:4.3.14.RELEASE]
 at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:738) ~[spring-aop-4.3.14.RELEASE.jar:4.3.14.RELEASE]
 at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157) ~[spring-aop-4.3.14.RELEASE.jar:4.3.14.RELEASE]
 at org.springframework.aop.interceptor.AsyncExecutionInterceptor$1.call(AsyncExecutionInterceptor.java:115) ~[spring-aop-4.3.14.RELEASE.jar:4.3.14.RELEASE]
 at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_151]
 at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) [na:1.8.0_151]
 at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) [na:1.8.0_151]
 at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_151]
 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_151]
 at java.lang.Thread.run(Thread.java:748) [na:1.8.0_151]
Caused by: redis.clients.jedis.exceptions.JedisConnectionException: Could not get a resource from the pool
 at redis.clients.util.Pool.getResource(Pool.java:53) ~[jedis-2.9.0.jar:na]
 at redis.clients.jedis.JedisPool.getResource(JedisPool.java:226) ~[jedis-2.9.0.jar:na]
 at redis.clients.jedis.JedisPool.getResource(JedisPool.java:16) ~[jedis-2.9.0.jar:na]
 at org.springframework.data.redis.connection.jedis.JedisConnectionFactory.fetchJedisConnector(JedisConnectionFactory.java:194) ~[spring-data-redis-1.8.10.RELEASE.jar:na]
 ... 19 common frames omitted
Caused by: java.lang.InterruptedException: null
 at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.reportInterruptAfterWait(AbstractQueuedSynchronizer.java:2014) ~[na:1.8.0_151]
 at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2088) ~[na:1.8.0_151]
 at org.apache.commons.pool2.impl.LinkedBlockingDeque.pollFirst(LinkedBlockingDeque.java:635) ~[commons-pool2-2.4.3.jar:2.4.3]
 at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:442) ~[commons-pool2-2.4.3.jar:2.4.3]
 at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:361) ~[commons-pool2-2.4.3.jar:2.4.3]
 at redis.clients.util.Pool.getResource(Pool.java:49) ~[jedis-2.9.0.jar:na]
 ... 22 common frames omitted

@Bean("taskExecutor")
public Executor taskExecutor() {
 ThreadPoolTaskScheduler executor = new ThreadPoolTaskScheduler();
 executor.setPoolSize(20);
 executor.setThreadNamePrefix("taskExecutor-");
 executor.setWaitForTasksToCompleteOnShutdown(true);
 executor.setAwaitTerminationSeconds(60);
 return executor;
}