1. 异常现象

Caused by: redis.clients.jedis.exceptions.JedisConnectionException: All sentinels down, cannot determine where is 127.0.0.1 master is running...

Caused by: redis.clients.jedis.exceptions.JedisConnectionException: All sentinels down, cannot determine where is mymaster master is running...

Caused by: redis.clients.jedis.exceptions.JedisConnectionException: All sentinels down, cannot determine where is mymaster master is running...
	at redis.clients.jedis.JedisSentinelPool.initSentinels(JedisSentinelPool.java:180)
	at redis.clients.jedis.JedisSentinelPool.<init>(JedisSentinelPool.java:95)
	at redis.clients.jedis.JedisSentinelPool.<init>(JedisSentinelPool.java:82)
	at redis.clients.jedis.JedisSentinelPool.<init>(JedisSentinelPool.java:70)
	at redis.clients.jedis.JedisSentinelPool.<init>(JedisSentinelPool.java:39)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
	at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:142)
	... 43 more

2. 排查分析

哨兵宕机，不能确定主机位置，即没有启动主从机。

3. 解决方案

看看是否已经开启 主节点、从节点 的服务端和 Sentinel。如果没有正常开启的话，确认开启后问题解决。

Redis 进击物语：
Redis进击（一）从0到1，Redis的安装与使用
Redis进击（二）搭建Redis主从复制服务集群（一主两从、反客为主）【Windows环境】
Redis进击（三）搭建Redis高可用集群的哨兵模式（Redis-Sentinel）【Windows环境】
Redis进击（四）Java中配置和使用Redis高可用集群的哨兵模式（Redis-Sentinel）【Spring&SpringBoot环境】
Redis进击（五）redis.conf配置文件说明备注手册
Redis异常：Creating Server TCP listening socket *:26379: bind : No such file or directory
Redis异常：JedisException: Can connect to sentinel, but 127.0.0.1:6379 seems to be not monitored...
Redis异常：JedisConnectionException: All sentinels down, cannot determine where is mymaster master is