I don’t think you can do this, because Hadoop doesn’t manage user groups. Itself needs to be configured into a user group mapping provider backed by your provided identity backends. If not provided, it uses shell login user and group in your Linux systems. With the user-group mapping provider, it can only determine the user’s groups given a user name. Again, it doesn’t be able to fetch all groups existing in your system or identity backend. Hope this helps.
Regards, Kai From: Shashi Vishwakarma [mailto:shashi.vish...@gmail.com] Sent: Thursday, September 22, 2016 5:05 PM To: user.hadoop <user@hadoop.apache.org> Subject: Get All Hadoop Groups Hi I am looking for a way to fetch all hadoop groups available on cluster. Is there any way to do this using Java? Thanks Shashi
