Q1:服务启动失败，提示如下信息
Error description: {error, {cannot_delete_plugins_expand_dir, ["/var/lib/rabbitmq/mnesia/rabbit@cluster62-plugins-expand", {cannot_delete, "/var/lib/rabbitmq/mnesia/rabbit@cluster62-plugins-expand/amqp_client-3.6.8/ebin/amqp_rpc_client.beam", eacces}]}} Log files (may contain more information): /var/log/rabbitmq/rabbit@cluster62.log /var/log/rabbitmq/rabbit@cluster62-sasl.log Stack trace: [{rabbit_plugins,setup,0,[{file,"src/rabbit_plugins.erl"},{line,71}]}, {rabbit,broker_start,0,[{file,"src/rabbit.erl"},{line,293}]}, {rabbit,start_it,1,[{file,"src/rabbit.erl"},{line,417}]}, {init,start_em,1,[]}, {init,do_boot,3,[]}]
解决：
查看这个目录/var/lib/rabbitmq/mnesia/rabbit@cluster62-plugins-expand所属用户及组名，正常应该是rabbitmq
如果不是，可以使用chown -R rabbitmq.rabbitmq 目录名 修改即可！
