Jedis，无法获取jedis连接：无法从池获取资源

Question

我已经在几个线程中看到了答案，但对我却没有解决，而且由于我的问题偶尔发生，因此问这个问题是否有人有任何想法。

我正在使用jedis版本2.8.0，Spring Data Redis版本1.7.5。和redis服务器版本2.8.4用于我们的缓存应用程序。

我有多个缓存保存在redis中，并且从redis获得请求。我正在使用spring数据redis API保存和获取数据。

所有保存和获取都可以正常工作，但偶尔会遇到以下异常：

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：

@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;
 }

 }

有没有人遇到这个问题或对此有任何想法，为什么会发生？

Answer 1

我从redis.template迁移到了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：

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

对于redis模板：

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

上面相同的配置也可以在redis模板中添加。