User Impersonation for Hive

User impersonation enables Hive to submit jobs as a particular user. Without impersonation, Hive submits queries and hadoop commands as the user that started HiveServer2 and Hive Metastore. On a MapR cluster, this user is typically the mapr user or the user specified in the MAPR_USER environment variable.

Note: Impersonation is enabled by default.