今天在hdfs上面创建文件夹的时候报了:org.apache.hadoop.dfs.SafeModeException: Cannot delete /user/hadoop/input. Name node is in safe mode 据资料是说hdfs刚刚启动,还在验证和适配,所以进入安全模式,等一会儿就好了,然后我等了几分钟并没有好..(惊了) 然后找到了解决安全模式的办法: 用户可以通过dfsadmin -safemode value 来操作安全模式,参数value的说明如下:…
往Linux系统中上传文件时候,我们经常会使用FTP连接Linux,也经常会使用mkdir命令来创建目录.最近发现用mkdir创建目录时提示550 Create directory operation failed(创建目录失败).需要改一个配置文件即可. [root@cc ~]# vi /etc/selinux/config # This file controls the state of SELinux on the system. # SELINUX= can take one of t…
Gradle Goodness: Task Output Annotations Create Directory Automatically One of the great features of Gradle is incremental build support. With incremental build support a task is only executed if it is really necessary. For example if a task generate…