在cloud foundry上使用spring-data-redis时检测到资源泄漏

Question

我们开发了一个spring-boot服务，它提供了一个rest api（spring-webflux）并通过RabbitMQ（spring-rabbit）发送数据。该服务部署在cloud foundry上，我们在版本2.1.4中使用spring-boot。我们添加了spring-boot-starter-data-redis来使用redis缓存一些数据，我们得到了以下错误：

[io.netty.util.ResourceLeakDetector] [] LEAK: HashedWheelTimer.release() was not called before it's garbage-collected. See http://netty.io/wiki/reference-counted-objects.html for more information.
Recent access records: 
Created at:
    io.netty.util.HashedWheelTimer.<init>(HashedWheelTimer.java:284)
    io.netty.util.HashedWheelTimer.<init>(HashedWheelTimer.java:217)
    io.netty.util.HashedWheelTimer.<init>(HashedWheelTimer.java:196)
    io.netty.util.HashedWheelTimer.<init>(HashedWheelTimer.java:178)
    io.netty.util.HashedWheelTimer.<init>(HashedWheelTimer.java:162)
    io.lettuce.core.resource.DefaultClientResources.<init>(DefaultClientResources.java:169)
    io.lettuce.core.resource.DefaultClientResources$Builder.build(DefaultClientResources.java:532)
    io.lettuce.core.resource.DefaultClientResources.create(DefaultClientResources.java:233)
    io.lettuce.core.AbstractRedisClient.<init>(AbstractRedisClient.java:98)
    io.lettuce.core.RedisClient.<init>(RedisClient.java:87)
    io.lettuce.core.RedisClient.create(RedisClient.java:124)
    org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory.lambda$createClient$7(LettuceConnectionFactory.java:971)
    java.base/java.util.Optional.orElseGet(Unknown Source)
    org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory.createClient(LettuceConnectionFactory.java:971)
    org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory.afterPropertiesSet(LettuceConnectionFactory.java:273)
    org.springframework.cloud.service.keyval.RedisConnectionFactoryCreator.create(RedisConnectionFactoryCreator.java:88)
    org.springframework.cloud.service.keyval.RedisConnectionFactoryCreator.create(RedisConnectionFactoryCreator.java:31)
    org.springframework.cloud.Cloud.getServiceConnector(Cloud.java:288)
    org.springframework.cloud.Cloud.getSingletonServiceConnector(Cloud.java:202)
    org.springframework.cloud.config.java.CloudServiceConnectionFactory.redisConnectionFactory(CloudServiceConnectionFactory.java:260)
    org.springframework.cloud.config.java.CloudServiceConnectionFactory.redisConnectionFactory(CloudServiceConnectionFactory.java:242)
    ...

@Configuration
@Profile( "cloud" )
public class CloudSpecificConfig extends AbstractCloudConfig {

   @Bean
   public RedisConnectionFactory redisConnectionFactory() {
      return connectionFactory().redisConnectionFactory();
   }
}

@Component
@RequiredArgsConstructor
public final class RequestUtil {

   private final StringRedisTemplate myRedisTemplate;

   public String cacheId(String id, String value) {
      myRedisTemplate.opsForValue().set( id, value );

   }
}

<properties>
  <spring-boot-version>2.1.4.RELEASE</spring-boot-version>
</properties>

  <dependency>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-webflux</artifactId>
     <version>${spring-boot-version}</version>
  </dependency>
  <dependency>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-configuration-processor</artifactId>
     <version>${spring-boot-version}</version>
  </dependency>
  <dependency>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-actuator</artifactId>
     <version>${spring-boot-version}</version>
  </dependency>
  <dependency>
     <groupId>org.springframework.cloud</groupId>
     <artifactId>spring-cloud-starter-sleuth</artifactId>
     <version>${spring-boot-version}</version>
  </dependency>
  <dependency>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-cloud-connectors</artifactId>
     <version>${spring-boot-version}</version>
  </dependency>
  <dependency>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-amqp</artifactId>
     <version>${spring-boot-version}</version>
  </dependency>
  <dependency>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-data-redis</artifactId>
     <version>${spring-boot-version}</version>
  </dependency>

我们这边相当迷茫，因为我们这边没有做任何具体的配置。对我们来说，云上的spring配置似乎有问题。我们做错什么了吗？我们是否需要进行不同的配置？这是窃听器吗？

Answer 1

这是我必须做的

我会看看能不能找到更优雅的方式

@Bean(destroyMethod = "shutdown")
public DefaultClientResources lettuceClientResources() {
    return DefaultClientResources.create();
}

@SuppressWarnings("unused")
@Bean
public RedisConnectionFactory redisConnectionFactory(DefaultClientResources dependency) {
    return connectionFactory().redisConnectionFactory("redis-pcf-service");
}