Hi Everyone, I came across a Kerberos cache issue and wanted to share and possible have more ideas. I understand few of us had some issues in the past and hope this article might help. One of our clients have RedHat IDM (supported version of freeIpa) and when you install sssd along with krb5 by IDM the default cache setting is 'KEYRING' than 'File' You will still be able to get the tickets but will have GSSException error on Cluster. KEYRING persistent cache setting works with many applications however not with HADOOP Cluster, I'm sure HDO engineering team must be looking into this for a solution, since KEYRING is the future for kerberos cache and the stuff you can do with it like keylist and etc. To solve the errors you can comment out the "default_ccache_name=KEYRING....." on krb.conf or change it to "default_ccache_name = FILE:/tmp/krb5cc_%{uid}" Logout and log in again - destroy the previous tickets and you should have something like "Ticket cache: FILE:/tmp/krb5cc_" in your klist output. If you still see KEYRING PERSISTENT, kill all the running sessions of the user having the problem and restart SSSD service. Thanks Mayank ... View more