I am trying to format namenode in hdfs but says: permission denied

Question

I am trying to format namenode . For this I have tried.

hduser@Ubuntu:/usr/hadoop/hadoop-2.7.1$ bin/hdfs namenode -format

It says:

bin/hdfs: line 304: /root/software/jdk1.8.0_45/bin/java: Permission denied
bin/hdfs: line 304: exec: /root/software/jdk1.8.0_45/bin/java: cannot execute: Permission denied

Answer 1

所以，你有一个奇怪的安装。看起来您正在尝试引用安装到/ root的JDK安装（这是非常不寻常的）。您正在获得权限被拒绝，因为您尝试将命令作为非特权运行，这取决于您的用户无法访问的JDK安装。

以root身份运行可能会使此错误消失，但您可能需要重新考虑非正统安装。