MapR 5.0 Documentation : Enable Impersonation for the mapr Superuser

Follow the steps below to enable impersonation in your MapR installation.

  1. Open the core-site.xml file in a text editor. 
  2. Add the these hadoop.proxyuser properties:

    <property>
        <name>hadoop.proxyuser.mapr.hosts</name>
        <value>*</value>
    </property>
    <property>
        <name>hadoop.proxyuser.mapr.groups</name>
        <value>*</value>
    </property>

    The hosts setting (*) allows the mapr superuser to impersonate any user in any group.
    The groups setting (*) allows the mapr superuser to connect from any host to impersonate a user.

    Do not use anything other than a single asterisk here. Other parts of MapR ignore the values here and treat them as if each is set to a single asterisk.

  3. Close the file, saving changes.