我试图在hdfs中格式化namenode，但说：权限被拒绝 [英] I am trying to format namenode in hdfs but says: permission denied

问题描述

我试图格式化namenode。

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

它表示：

  bin / hdfs：第304行：/root/software/jdk1.8.0_45/bin/java：权限被拒绝
 bin / hdfs：第304行：exec：/ root / software / jdk1。 8.0_45 / bin / java：can not execute：Permission denied 
  

解决方案

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（这非常不寻常）。您正在获取权限，因为您试图将命令作为非特权运行，而该特权取决于您的用户无法访问的JDK安装。

以root身份运行可能会导致此错误消失，但您可能需要重新考虑非正统安装。

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

解决方案

So, you have an odd install. It looks like you are trying to reference a JDK installation that is installed to /root (this is very unusual). You are getting permission denied because you are trying to run a command as a non-privileged that depends on that JDK installation that your user can't access.

Running as root would probably make this error go away but you probably have an unorthodox installation that might need to be reconsidered.

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