jedis连接不上redis，sentinel报错

[wangbin0016]

// 通过Jedis连接池创建一个Sentinel连接池
JedisSentinelPool pool = new JedisSentinelPool("mymaster", sentinels, poolConfig);
// 获取master的主机和端口
HostAndPort currentHostMaster = pool.getCurrentHostMaster();

System.out.println(currentHostMaster.getHost() + "--" + currentHostMaster.getPort());

// 从Sentinel池中获取资源
Jedis resource = pool.getResource();

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可以获取到 currentHostMaster 地址也是正确的。但是 Jedis resource = pool.getResource();就报异常说redis.clients.jedis.exceptions.JedisException: Could not get a resource from the pool。

相同的地址，直接连是可以的。但是这个JedisSentinelPool为什么不行？