Why user is unable to access file on a nfs-share, despite having the required permissions?

Solution Verified - Updated -

Issue

  • The user is having the required permissions; However, accessing the file results in permission denied.
[user2@hostname ~] $ id
uid=1200001230(user2) gid=185419(group2) groups=185419(group2),185058(group1)

[user2@hostname ~] $ ls -l /home/drrepo/prod/Source_Files/IPX/tdw                                                                                                                                                                                                         
-rwxrwx--- 1 user1 group1 5 Feb  5 11:28 /home/drrepo/prod/Source_Files/IPX/tdw

[user2@hostname ~] $ cat /home/drrepo/prod/Source_Files/IPX/tdw                                                                                                                                                                                                          
cat: /home/drrepo/prod/Source_Files/IPX/tdw: Permission denied
  • Here, user2 is trying to open tdw file which has rwx access to users and groups.
  • The file is owned by user1 and group1
  • user2 is a member of group1.
  • The file is in a nfs-share where the nfs-server vendor is EMC Isilon.

Environment

  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • NFSv3
  • EMC Isilon

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