万里数据库GreatDB集中式故障诊断：组复制问题处理-6

启动失败问题

参数配置问题

1. 没有配置 group_replication_group_seeds 参数

    greatdb> start group_replication;
    ERROR 3097 (HY000): The START GROUP_REPLICATION command failed as there was an error when joining the communication group.
   

   执行启动命令，提示无法加入复制组，但没有更具体的错误提示。此时，同样查看错误日志，有如下信息，其中关键的为第一行，perrs not configured，表示没有配置 group_replication_group_seeds 参数。

    [ERROR] [MY-011735] [Repl] Plugin group_replication reported: '[GCS] Unable to join the group: peers not configured. '
    [ERROR] [MY-011639] [Repl] Plugin group_replication reported: 'Error on group communication engine start'
    [Note] [MY-011649] [Repl] Plugin group_replication reported: 'Requesting to leave the group despite of not being a member'
    [ERROR] [MY-011735] [Repl] Plugin group_replication reported: '[GCS] The member is leaving a group without being on one.'
   

   注意：该参数格式为多个 group_replication_local_address的组合，使用逗号分隔。一般配置时，需要将所有包含所有节点的 group_replication_local_address 值。