万里数据库GreatDB集中式故障诊断：组复制问题处理-5

启动失败问题

参数配置问题-2

• 没有配置 group_replication_local_address 变量

greatdb> start group_replication;
ERROR 3096 (HY000): The START GROUP_REPLICATION command failed as there was an error when initializing the group communication layer.

执行启动命令，同样没有提示关键的错误信息。此时，同样查看错误日志，会发现如下错误信息，其中最关键的是第一行的错误，表示 group_replication_local_address参数没有正确配置。

[ERROR] [MY-011735] [Repl] Plugin group_replication reported: '[GCS] Invalid hostname or IP address () assigned to the parameter local_node!'
[ERROR] [MY-011674] [Repl] Plugin group_replication reported: 'Unable to initialize the group communication engine'
[ERROR] [MY-011637] [Repl] Plugin group_replication reported: 'Error on group communication engine initialization'
[Note] [MY-011649] [Repl] Plugin group_replication reported: 'Requesting to leave the group despite of not being a member'
[ERROR] [MY-011718] [Repl] Plugin group_replication reported: 'Error calling group communication interfaces while trying to leave the group'

注意：在组复制集群中，每个节点需要单独配置 group_replication_local_address，该参数为 hostname/ip 和 port 的组合，其中 port 为组复制的端口号，而不是 greatdb 服务进程的端口号。参数的格式为 [ipv6]:port ，或者 ipv4:port 或者 hostname:port。其中，hostname/ip需要能够被集群其它节点正常访问。