presto-redis/src/main/java/io/prestosql/plugin/redis/RedisJedisManager.java/RedisJedisManager/tearDown
class RedisJedisManager:    @PreDestroy
    public void tearDown()
    {
        for (Map.Entry<HostAddress, JedisPool> entry : jedisPoolCache.asMap().entrySet()) {
            try {
                entry.getValue().destroy();
            }
            catch (Exception e) {
                log.warn(e, "While destroying JedisPool %s:", entry.getKey());
            }
        }
    }