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

问题描述

我在几个线程中都看到了答案，但并没有为我解决，而且由于我的问题偶尔发生，问这个问题是否有人有想法.

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.

我正在使用jedis版本2.8.0，Spring Data Redis版本1.7.5.并为我们的缓存应用程序提供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，并且从Redis获取请求.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.

所有保存和获取均能正常工作，但偶尔会遇到以下异常:

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;
 }

 }

有人遇到这个问题或对此有任何想法吗，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转到了纯Jedis. 为池添加了以下配置(也可以在redis模板中添加)，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);

用于redis模板:

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

相同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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