Jedis，无法获得 jedis 连接:无法从池中获取资源 [英] Jedis, Cannot get jedis connection: cannot get resource from pool

问题描述

我已经在几个线程中看到了答案，但对我没有用，而且由于我的问题偶尔会发生，如果有人有任何想法，请询问这个问题.

I have seen answers in couple of threads but didn't work out for me and since my problem occurs occasionally, asking this question if any one has any idea.

我使用的是 jedis 2.8.0 版，Spring Data redis 1.7.5 版.以及用于缓存应用程序的 redis 服务器版本 2.8.4.

I am using jedis version 2.8.0, Spring Data redis version 1.7.5. and redis server version 2.8.4 for our caching application.

我有多个缓存保存在 redis 中，获取请求是从 redis 完成的.我正在使用 spring 数据 redis API 来保存和获取数据.

I have multiple cache that gets saved in redis and get request is done from redis. I am using spring data redis APIs to save and get data.

所有保存和获取都可以正常工作，但偶尔会低于异常:

All save and get works fine, but getting below exception occasionally:

Cannot get Jedis connection; nested exception is redis.clients.jedis.exceptions.JedisConnectionException: Could not get a resource from the pool | org.springframework.data.redis.RedisConnectionFailureException: Cannot get Jedis connection; nested exception is redis.clients.jedis.exceptions.JedisConnectionException: Could not get a resource from the poolorg.springframework.data.redis.RedisConnectionFailureException: Cannot get Jedis connection; nested exception is redis.clients.jedis.exceptions.JedisConnectionException: Could not get a resource from the pool
org.springframework.data.redis.connection.jedis.JedisConnectionFactory.fetchJedisConnector(JedisConnectionFactory.java:198)
org.springframework.data.redis.connection.jedis.JedisConnectionFactory.getConnection(JedisConnectionFactory.java:345)
org.springframework.data.redis.core.RedisConnectionUtils.doGetConnection(RedisConnectionUtils.java:129)
org.springframework.data.redis.core.RedisConnectionUtils.getConnection(RedisConnectionUtils.java:92)
org.springframework.data.redis.core.RedisConnectionUtils.getConnection(RedisConnectionUtils.java:79)
org.springframework.data.redis.core.RedisTemplate.execute(RedisTemplate.java:191)
org.springframework.data.redis.core.RedisTemplate.execute(RedisTemplate.java:166)
org.springframework.data.redis.core.AbstractOperations.execute(AbstractOperations.java:88)
org.springframework.data.redis.core.DefaultHashOperations.get(DefaultHashOperations.java:49)

我的redis配置类:

My redis configuration class:

@Configuration
public class RedisConfiguration {

@Value("${redisCentralCachingURL}")
private String redisHost;

@Value("${redisCentralCachingPort}")
private int redisPort;

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

@Bean
JedisConnectionFactory jedisConnectionFactory() {
  JedisConnectionFactory factory = new JedisConnectionFactory();
  factory.setHostName(redisHost);
  factory.setPort(redisPort);
  factory.setUsePool(true);
  return factory;
}

@Bean
public RedisTemplate<String, Object> redisTemplate() {
  RedisTemplate<String, Object> redisTemplate = new RedisTemplate<>();
  redisTemplate.setConnectionFactory(jedisConnectionFactory());
  redisTemplate.setExposeConnection(true);
  // No serializer required all serialization done during impl
  redisTemplate.setKeySerializer(stringRedisSerializer());
  //`redisTemplate.setHashKeySerializer(stringRedisSerializer());
  redisTemplate.setHashValueSerializer(new GenericSnappyRedisSerializer());
  redisTemplate.afterPropertiesSet();
  return redisTemplate;
}

@Bean
public RedisCacheManager cacheManager() {
  RedisCacheManager redisCacheManager = new RedisCacheManager(redisTemplate());
  redisCacheManager.setTransactionAware(true);
  redisCacheManager.setLoadRemoteCachesOnStartup(true);
  redisCacheManager.setUsePrefix(true);
  return redisCacheManager;
 }

 }

有没有人遇到过这个问题或对此有任何想法，为什么会发生这种情况?

Did anyone faced this issue or have any idea on this, why might this happen?

推荐答案

我从 redis.template 移到了普通的 jedis.为pool添加了以下配置(也可以添加到redis模板中)，现在看不到任何异常:

I moved from redis.template to plain jedis. Added below configuration(can be added in redis template too) for pool and don't see any exception now:

jedisPoolConfig.setMaxIdle(30);
jedisPoolConfig.setMinIdle(10);

对于 redis 模板:

for redis template:

jedisConnectionFactory.getPoolConfig().setMaxIdle(30);
jedisConnectionFactory.getPoolConfig().setMinIdle(10);

同样的配置也可以添加到redis模板中.

Same above config can be added in redis template too.

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