User not returning any groups for hdfs groups <ID>

[#1]

Hello,

I have one user ID which is not returning any groups for hdfs groups <ID>. However, groups <ID> is giving proper group mapping. Any thoughts? 

[#2]

Thank you for following up here! [1] Glad to hear you were able to chase down the cause.

[1] - https://xkcd.com/979/