ambari-server/src/main/resources/stacks/HDP/2.0._/services/HBASE/package/templates/hbase_regionserver_jaas.conf.j2

Client {
com.sun.security.auth.module.Krb5LoginModule required
useKeyTab=true
storeKey=true
useTicketCache=false
keyTab="{{regionserver_keytab_path}}"
principal="{{regionserver_jaas_princ}}";
};