Support Questions

cjervis · ‎01-15-2014

when i use hdfs comands it display errors:

hadoop fs -mkdir /user/,,myfile,, or "hadoop fs -put myfile.txt /user/,,/,,"

hadoop will display"Permission denied: user=root, access=WRITE, inode="/user":hdfs:supergroup:dr,,,"and so on,why?who can help me?

cconner · ‎01-16-2014

Hey,

The /user/ directory is owned by "hdfs" with 755 permissions. As a result only hdfs can write to that directory. Unlike unix/linux, hdfs is the superuser and not root. So you would need to do this:

sudo -u hdfs hadoop fs -mkdir /user/,,myfile,,
sudo -u hdfs hadoop fs -put myfile.txt /user/,,/,,

If you want to create a home directory for root so you can store files in his directory, do:

sudo -u hdfs hadoop fs -mkdir /user/root
sudo -u hdfs hadoop fs -chown root /user/root

Then as root you can do "hadoop fs -put file /user/root/".

Hope this helps.

Chris

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Pandeyg2106 · ‎09-24-2017

Still cant copy files to the folder under user.

csguna · ‎09-24-2017

@Pandeyg2106 could you let us know the error and the user you are firing

AshisP · ‎11-16-2017

export HADOOP_USER_NAME=hdfs

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Support Questions

HDFS Permission Denied: Why Root Cannot Write to the /user Directory