redis连接异常 redis.clients.jedis.exceptions.JedisClusterException: CLUSTERDOWN The cluster is down

遇到一个问题，因为是在测试环境，之前退出使用的kill -9暴力方式，再重新启动redis集群的时候，先并没有恢复rdb和aof，使用redis-cli客户端可以连接，说明集群已经启动来了，但是使用jedis客户端代码连接不上，抛异常：

Exception in thread "main" redis.clients.jedis.exceptions.JedisClusterException: CLUSTERDOWN The cluster is down
    at redis.clients.jedis.Protocol.processError(Protocol.java:126)
    at redis.clients.jedis.Protocol.process(Protocol.java:166)
    at redis.clients.jedis.Protocol.read(Protocol.java:220)
    at redis.clients.jedis.Connection.readProtocolWithCheckingBroken(Connection.java:318)
    at redis.clients.jedis.Connection.getBinaryBulkReply(Connection.java:255)
    at redis.clients.jedis.Connection.getBulkReply(Connection.java:245)
    at redis.clients.jedis.Jedis.get(Jedis.java:181)
    at redis.clients.jedis.JedisCluster$3.execute(JedisCluster.java:161)
    at redis.clients.jedis.JedisCluster$3.execute(JedisCluster.java:158)
    at redis.clients.jedis.JedisClusterCommand.runWithRetries(JedisClusterCommand.java:106)
    at redis.clients.jedis.JedisClusterCommand.run(JedisClusterCommand.java:25)
    at redis.clients.jedis.JedisCluster.get(JedisCluster.java:163)
    at com.study.cache.JedisTest.main(JedisTest.java:17)
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重启redis集群，重试不行，还是报相同的错；

把每个redis节点下面的rdb和aof都删除（如果是生产环境谨慎操作），重启redis集群，用jedis客户端代码也可以连接了，没有抛异常；

cd D:\Redis\Redis6379

redis-server.exe --service-stop --service-name Redis6379
redis-server.exe --service-stop --service-name Redis6380
redis-server.exe --service-stop --service-name Redis6381
redis-server.exe --service-stop --service-name Redis6382
redis-server.exe --service-stop --service-name Redis6383
redis-server.exe --service-stop --service-name Redis6384

redis-server.exe --service-start --service-name Redis6379
redis-server.exe --service-start --service-name Redis6380
redis-server.exe --service-start --service-name Redis6381
redis-server.exe --service-start --service-name Redis6382
redis-server.exe --service-start --service-name Redis6383
redis-server.exe --service-start --service-name Redis6384

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代码正常运行