redis集群，模块启动报错：PoolException: Returned connection io.lettuce.core.cluster.StatefulRedisClusterConnectionImpl@49bd0985 was either previously returned or does not belong to this connection provider

redis 3主3从的配置 启动正常，客户端命令使用正常，突然今天开发测试环境 有些模块报错了：

org.springframework.data.redis.connection.PoolException: Returned connection io.lettuce.core.cluster.StatefulRedisClusterConnectionImpl@49bd0985 was either previously returned or does not belong to this connection provider

 

有些模块重启正常，能拿到连接，但是之后的报错信息就是 一直ping失败：

2023-04-06 09:52:11.924|ERROR|10.42.12.188|redisson-timer-4-1|org.redisson.client.handler.PingConnectionHandler|run|Unable to send PING command over channel: [id: 0x59d6f772, L:/$ip:$port - R:/$redis1-ip:$redis1-port ]

2023/4/6 09:52:11 org.redisson.client.RedisTimeoutException: Command execution timeout for command: (PING), params: [], Redis client: [addr=redis://$redis1-ip:$redis1-port]

 

我就纳闷为什么总是这一台，所以想去重启，shutdown报错，让我去看日志

(error) ERR Errors trying to SHUTDOWN. Check logs.

 

结果去redis配置文件看日志目录 （logfile  "/usr/local/redis/log/redis_6379_log.log"  ），发现日志很大，df -h看了下磁盘，满了！！ 所以 清除日志：cat /dev/null > redis_6379_log.log 后 ，恢复成功