ambari-server restart --debug giving "su: cannot open session: Permission denied"

The jenkins job is as follows : <http://linux-
jenkins.qe.hortonworks.com:8080/job/Nightly-Start-EC2-Run-HDP/407827/>

STR :
1) Execute "ambari-server setup-ldap"
2) Once LDAP setup goes through fine, call "ambari-server restart --debug "

The following error pops up :

/usr/lib64/python2.7/getpass.py:83: GetPassWarning: Can not control echo on the terminal.
passwd = fallback_getpass(prompt, stream)
Warning: Password input may be echoed.
Enter Manager Password* :
Warning: Password input may be echoed.
Re-enter password:

[EXIT CODE]
0
2017-02-28 04:13:39,529 INFO com.hw.ambari.ui.util.cluster_managers.LDAPClusterManager.ambariServerSetupLDAP():
Ambari server LDAPS setup process ended

2017-02-28 04:13:39,529 INFO com.hw.ambari.ui.util.cluster_managers.AmbariManager.getStartAmbariServerCommand(): Trying to restart Ambari server ...
2017-02-28 04:13:39,530 DEBUG com.hw.ambari.ui.util.cluster_managers.CommandExecutor.executeCommandSequence(): Sending commands to host [ctr-e129-1487033772569-27178-01-000003.hwx.site]:
2017-02-28 04:13:39,530 DEBUG com.hw.ambari.ui.util.cluster_managers.CommandExecutor.executeCommandSequence(): Sending command [export AMBARI_JVM_ARGS="-Xms512m -Xmx2048m -XX:PermSize=1024m -XX:MaxPermSize=1024m"]
2017-02-28 04:13:39,531 DEBUG com.hw.ambari.ui.util.cluster_managers.CommandExecutor.executeCommandSequence(): Sending command [ambari-server restart --debug]
2017-02-28 04:13:41,753 DEBUG com.hw.ambari.ui.util.cluster_managers.ProcessData.buildOutputAndErrorStreamData(): su: cannot open session: Permission denied
2017-02-28 04:13:59,989 DEBUG com.hw.ambari.ui.util.cluster_managers.CommandExecutor.executeCommandSequence(): [OUTPUT STREAM]
Using python /usr/bin/python
Restarting ambari-server
Waiting for server stop...
Ambari Server stopped
Ambari Server running with administrator privileges.
Organizing resource files at /var/lib/ambari-server/resources...
Ambari database consistency check started...
Server PID at: /var/run/ambari-server/ambari-server.pid
Server out at: /var/log/ambari-server/ambari-server.out
Server log at: /var/log/ambari-server/ambari-server.log
Waiting for server start.........Unable to determine server PID. Retrying...
......Unable to determine server PID. Retrying...
......Unable to determine server PID. Retrying...

I ran ulimit on the root user :

[root@ctr-e129-1487033772569-27178-01-000003 ~]# ulimit
unlimited

Ran service ambari-server start :

[root@ctr-e129-1487033772569-27178-01-000003 ~]# service ambari-server start
Using python /usr/bin/python
Starting ambari-server
Ambari Server running with administrator privileges.
Organizing resource files at /var/lib/ambari-server/resources...
Ambari database consistency check started...
Server PID at: /var/run/ambari-server/ambari-server.pid
Server out at: /var/log/ambari-server/ambari-server.out
Server log at: /var/log/ambari-server/ambari-server.log
Waiting for server start....su: cannot open session: Permission denied

The ambari logs don't have any data

Artifacts :
<http://qelog.hortonworks.com/log/nat-yc-r7-qafs-ambari-api-rbac-8/artifacts/a
rtifacts/screenshots/com.hw.ambari.ui.tests.console.ldap.LDAPRBACSanity/setupL
DAPAndRBACSanity/28_4_14_3_Couldn_t_create_user_clusteruser_due_to_java_lang
NullPointerException/test_logs/test_LDAPRBACSanity_debug.log>