问题描述今天在yarn上跑一个hadoop任务时，通过yarn的web管理后台(serveraddress:8088)想查看该任务的的任务时，发现提示如下错误：Java.lang.Exception:Unknown container.Container either has not started or has already completed or doesn;t belong to t

问题描述今天搭建Hadoop伪集群时在虚拟机上新创建了一个Linux系统，但当使用普通用户登录后在终端中执行sudo命令时提示以下错误：We trust you have received the usual lecture from the local SystemAdministrator. It usually boils down to these three things: