Question

I installed coudera hadoop 4 on a cluster of about 20 nodes. Using cloudera manager it went really smooth and all, but when I want to create an input directory using hadoop fs -mkdir input I get the following error: mkdir: Permission denied: user=root, access=WRITE, inode="/user":hdfs:supergroup:drwxr-xr-x Looks like a classic wrong permissions case but I have no clue where to start to fix this.
I found this document which I think would solve my problem if I knew what to do with it. For starters I don’t know whether I am using MapReduce v1 of v2 (I don’t see any yarn service in my cloudera manager so my guess would be v1 (?)). Second, since the whole installation was automatic I don’t know what is installed and where.

Could anyone point me towards some easy steps to solve my problem? I’m really looking for the easiest solution here, I don’t care at all about security since it is only a test. If I could give all users all possible permissions that would be fine.

Answer 1

I solved my problem: In cloudera manager, go to hdfs configuration under advanced and put the following code in HDFS Service Configuration Safety Valve:

<property>
  <name>dfs.permissions</name>
  <value>false</value>
</property>