Create a Proxy User
You must specify the proxy user properties for groups and hosts for the Oozie
process in the Hadoop core-site.xml file.
Steps
In Ambari, select the HDFS component.
Click Configs>Advanced.
Scroll to the Custom core-site section and expand the section.
Specify the following properties:
Field name: hadoop.proxyuser.oozie.groupsValue: $USER_GROUPS_THAT_ALLOW_IMPERSONATIONDescription: A comma-separated list of the groups that the impersonated user belongs to. Field name: hadoop.proxyuser.oozie.hostsValue: $OOZIE_SERVER_HOSTNAMEDescription: A comma-separated list of the hosts from which the user can connect to impersonate a user in the specified groups.