CANCEL DECOMMISSION description 该语句用于撤销一个节点下线操作。(仅管理员使用!) 语法: CANCEL DECOMMISSION BACKEND "host:heartbeat_port"[,"host:heartbeat_port"...]; example 取消两个节点的下线操作: CANCEL DECOMMISSION BACKEND "host1:port", "host2:port"; keyword CANCEL,DECOMMISSION,BACKEND