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

[15-second guess] If hdfs isn't running as root, why is it accessing paths in /root? /root is mode 0700 for a reason :) — moshbear, Jul 31 '15 at 20:04
so what is the reason and how can I get out of it?? @moshbear — Aevi, Jul 31 '15 at 20:19

score 1 · Answer 1 · answered Jul 31 '15 at 23:59

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.

So what could be the solution in this case. – Aevi Aug 01 '15 at 03:33 — Aevi, Aug 01 '15 at 03:33

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

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