redis从服务报错日志：

62270:S 31 May 2022 13:57:03.039 # Error condition on socket for SYNC: Connection refused
62270:S 31 May 2022 13:57:04.091 * Connecting to MASTER 192.168.211.190:6379
62270:S 31 May 2022 13:57:04.091 * MASTER <-> REPLICA sync started
62270:S 31 May 2022 13:57:04.091 # Error condition on socket for SYNC: Connection refused
62270:S 31 May 2022 13:57:05.097 * Connecting to MASTER 192.168.211.190:6379
62270:S 31 May 2022 13:57:05.097 * MASTER <-> REPLICA sync started
62270:S 31 May 2022 13:57:05.097 # Error condition on socket for SYNC: Connection refused
62270:S 31 May 2022 13:57:06.112 * Connecting to MASTER 192.168.211.190:6379
62270:S 31 May 2022 13:57:06.112 * MASTER <-> REPLICA sync started
62270:S 31 May 2022 13:57:06.112 # Error condition on socket for SYNC: Connection refused
62270:S 31 May 2022 13:57:07.119 * Connecting to MASTER 192.168.211.190:6379
 

排查：

1.防火墙 状态

2.redis主配置文件

    bind 127.0.0.1 -::1这个是默认值，主服务器绑定了127.0.0.1，其他的服务器IP访问就会拒绝

    先要将 bind 127.0.0.1 -::1注释，或修改为bind 0.0.0.0 （本人就是直接添加bind 0.0.0.0，没注释默认值，导致报错）