as @Bhupendra Mishra indirectly pointed out, ensure to launch pip install numpy command from a root account (sudo does not suffice) after forcing umask to 022 ( umask 022 ) so it cascades the rights to Spark (or Zeppelin) User Also, You have to be aware that you need to have numpy installed on each and every worker, and even the master itself (depending on your component placement) ... View more