线上环境，偶尔Could not get a resource from the pool

错误如下：
```
2019-10-14 at 13:05:26.633 CST ERROR com.br.hermes.web.cache.CodisService get-codis get exception, key =***. Exception: redis.clients.jedis.exceptions.JedisConnectionException: java.net.SocketTimeoutException: Read timed out
2019-10-14 at 13:05:27.387 CST ERROR com.br.hermes.web.cache.CodisService get-codis get exception, key =***. Exception: redis.clients.jedis.exceptions.JedisException: Could not get a resource from the pool
at io.codis.jodis.RoundRobinJedisPool.getResource(RoundRobinJedisPool.java:218) ~[jodis-0.5.1.jar:?]
2019-10-14 at 13:05:27.350 CST ERROR com.br.hermes.web.cache.CodisService get-codis get exception, key =***. Exception: redis.clients.jedis.exceptions.JedisException: Could not get a resource from the pool
at io.codis.jodis.RoundRobinJedisPool.getResource(RoundRobinJedisPool.java:218) ~[jodis-0.5.1.jar:?]
2019-10-14 at 13:05:27.304 CST ERROR com.br.hermes.web.cache.CodisService get-codis get exception, key =***. Exception: redis.clients.jedis.exceptions.JedisException: Could not get a resource from the pool
at io.codis.jodis.RoundRobinJedisPool.getResource(RoundRobinJedisPool.java:218) ~[jodis-0.5.1.jar:?]
2019-10-14 at 13:05:27.199 CST ERROR com.br.hermes.web.cache.CodisService get-codis get exception, key =***. Exception: redis.clients.jedis.exceptions.JedisException: Could not get a resource from the pool
at io.codis.jodis.RoundRobinJedisPool.getResource(RoundRobinJedisPool.java:218) ~[jodis-0.5.1.jar:?]
2019-10-14 at 13:05:27.219 CST ERROR com.br.hermes.web.cache.CodisService get-codis get exception, key =***. Exception: redis.clients.jedis.exceptions.JedisConnectionException: java.net.SocketTimeoutException: Read timed out
2019-10-14 at 13:05:27.161 CST ERROR com.br.hermes.web.cache.CodisService get-codis get exception, key =***. Exception: redis.clients.jedis.exceptions.JedisConnectionException: Could not get a resource from the pool
at io.codis.jodis.RoundRobinJedisPool.getResource(RoundRobinJedisPool.java:218) ~[jodis-0.5.1.jar:?]
2019-10-14 at 13:05:27.092 CST ERROR com.br.hermes.web.cache.CodisService get-codis get exception, key =***. Exception: redis.clients.jedis.exceptions.JedisException: Could not get a resource from the pool
at io.codis.jodis.RoundRobinJedisPool.getResource(RoundRobinJedisPool.java:218) ~[jodis-0.5.1.jar:?]
2019-10-14 at 13:05:27.071 CST ERROR com.br.hermes.web.cache.CodisService get-codis get exception, key =***. Exception: redis.clients.jedis.exceptions.JedisConnectionException: Could not get a resource from the pool
at io.codis.jodis.RoundRobinJedisPool.getResource(RoundRobinJedisPool.java:218) ~[jodis-0.5.1.jar:?]
```