启用事务支持时是否未正确释放spring-data-redis连接？

Question

在我们的Spring 4项目中,我们希望有涉及Redis和Hibernate的数据库事务.每当Hibernate失败时,例如由于乐观锁定,Redis事务也应该中止.

这似乎有用

1. 单线程事务执行.
2. 多线程事务执行,只要事务只包含一个Redis调用.
3. 如果从我们的配置中排除Hibernate,则使用多个Redis调用执行多线程事务.

一旦事务包含多个Redis调用,并且Hibernate配置为参与事务,连接绑定和多线程似乎就会出现问题.线程被卡住RedisConnectionUtils.bindConnection(),可能是因为JedisPool连接耗尽.

这可以如下再现.

@Service
public class TransactionalService {

    @Autowired
    @Qualifier("redisTemplate")
    private RedisTemplate<String, Object> redisTemplate;

    @Transactional
    public void processTask(int i){

        redisTemplate.convertAndSend("testChannel", new Message());
        redisTemplate.convertAndSend("testChannel", new Message());
    }
}

我们使用ThreadPoolTaskExecutor核心池大小为50来模拟多线程事务.

@Service
public class TaskRunnerService {

    @Autowired
    private TaskExecutor taskExecutor;

    @Autowired
    private TransactionalService transactionalService;

    public void runTasks() {

        for (int i = 0; i < 100; i++) {

            final int j = i;

            taskExecutor.execute(new Runnable() {

                @Override
                public void run() {
                    transactionalService.processTask(j);
                }
            });
        }
    }
}

运行此结果会导致所有taskExecutor线程挂在JedisPool.getResource()中:

  "taskExecutor-1" - Thread t@18
   java.lang.Thread.State: WAITING
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for <1b83c92c> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
    at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
    at org.apache.commons.pool2.impl.LinkedBlockingDeque.takeFirst(LinkedBlockingDeque.java:524)
    at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:438)
    at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:361)
    at redis.clients.util.Pool.getResource(Pool.java:40)
    at redis.clients.jedis.JedisPool.getResource(JedisPool.java:84)
    at redis.clients.jedis.JedisPool.getResource(JedisPool.java:10)
    at org.springframework.data.redis.connection.jedis.JedisConnectionFactory.fetchJedisConnector(JedisConnectionFactory.java:90)
    at org.springframework.data.redis.connection.jedis.JedisConnectionFactory.getConnection(JedisConnectionFactory.java:143)
    at org.springframework.data.redis.connection.jedis.JedisConnectionFactory.getConnection(JedisConnectionFactory.java:41)
    at org.springframework.data.redis.core.RedisConnectionUtils.doGetConnection(RedisConnectionUtils.java:128)
    at org.springframework.data.redis.core.RedisConnectionUtils.bindConnection(RedisConnectionUtils.java:66)
    at org.springframework.data.redis.core.RedisTemplate.execute(RedisTemplate.java:175)
    at org.springframework.data.redis.core.RedisTemplate.execute(RedisTemplate.java:152)
    at org.springframework.data.redis.core.RedisTemplate.convertAndSend(RedisTemplate.java:675)
    at test.TransactionalService.processTask(TransactionalService.java:23)
    at test.TransactionalService$$FastClassBySpringCGLIB$$9b3de279.invoke(<generated>)
    at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
    at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:708)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
    at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:98)
    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:262)
  at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:95)
  at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
  at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:644)
  at test.TransactionalService$$EnhancerBySpringCGLIB$$a1b3ba03.processTask(<generated>)
  at test.TaskRunnerService$1.run(TaskRunnerService.java:28)
  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

   Locked ownable synchronizers:
    - locked <7d528cf7> (a java.util.concurrent.ThreadPoolExecutor$Worker)   

Redis配置

@Configuration
public class RedisConfig {

    @Bean
    public JedisConnectionFactory jedisConnectionFactory() {
        JedisConnectionFactory jedisConnectionFactory = new JedisConnectionFactory();
        jedisConnectionFactory.setPoolConfig(new JedisPoolConfig());
        return jedisConnectionFactory;
    }

    @Bean
    public Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer() {
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new     Jackson2JsonRedisSerializer(Object.class);
        jackson2JsonRedisSerializer.setObjectMapper(objectMapper());
        return jackson2JsonRedisSerializer;
    }

    @Bean
    public StringRedisSerializer stringRedisSerializer() {
        return new StringRedisSerializer();
    }

    @Bean
    public RedisTemplate<String, Object> redisTemplate() {
        RedisTemplate<String, Object> redisTemplate = new RedisTemplate();
        redisTemplate.setConnectionFactory(jedisConnectionFactory());
        redisTemplate.setKeySerializer(stringRedisSerializer());
        redisTemplate.setValueSerializer(jackson2JsonRedisSerializer());
        redisTemplate.setEnableTransactionSupport(true);
        return redisTemplate;
    }

    @Bean
    public ObjectMapper objectMapper() {
        ObjectMapper objectMapper = new ObjectMapper();
        objectMapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        objectMapper.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        return objectMapper;
    }
}

Hibernate配置

@EnableTransactionManagement
@Configuration
public class HibernateConfig {

    @Bean
    public LocalContainerEntityManagerFactoryBean admin() {

        LocalContainerEntityManagerFactoryBean entityManagerFactoryBean = new     LocalContainerEntityManagerFactoryBean();
        entityManagerFactoryBean.setJpaVendorAdapter(new HibernateJpaVendorAdapter());
        entityManagerFactoryBean.setPersistenceUnitName("test");

        return entityManagerFactoryBean;
    }

    @Bean
    public JpaTransactionManager transactionManager(
            @Qualifier("admin") LocalContainerEntityManagerFactoryBean     entityManagerFactoryBean) {

        JpaTransactionManager transactionManager = new JpaTransactionManager();
        transactionManager.setEntityManagerFactory(entityManagerFactoryBean.getObject());
        transactionManager.setDataSource(entityManagerFactoryBean.getDataSource());

        return transactionManager;
    }
}

这是spring-data-redis中的错误还是我们的配置有问题？

Answer 1

在我使用 opsForHAsh 并放置许多键遇到完全相同的问题之前，我（巧合地）发现了你的问题。线程转储证实了这一点。

我发现增加 JedisPoolConfig 中的线程池对我有所帮助。我将其设置如下，设置为 128，这让我再次上路。

@Bean
JedisPoolConfig jedisPoolConfig() {
    JedisPoolConfig jedisPoolConfig = new JedisPoolConfig();
    jedisPoolConfig.setMaxTotal(128);
    return jedisPoolConfig;
}

我认为在我的情况下池太小，并且所有线程都用于我的事务，因此无限期地等待。将总计设置为 128 让我可以继续。尝试将您的配置设置为对您的应用程序有意义的 maxTotal。