Installing watson centos7 installer on centos6 machine does not give error but does not install properly

Installing centos7 version on centos6 machines:

couchbases-MacBook-Pro:testrunner prernamanaktala$ ssh root@172.23.107.56
root@172.23.107.56's password:
Last login: Fri Sep 4 00:20:05 2015 from 192.168.2.50
[root@localhost ~]# /etc/init.d/
auditd ip6tables lvm2-monitor postfix sandbox udev-post
blk-availability iptables netconsole rdisc saslauthd xe-linux-distribution
crond killall netfs restorecond single
halt lvm2-lvmetad network rsyslog sshd
[root@localhost ~]# rpm -e couchbase-server
error: package couchbase-server is not installed
[root@localhost ~]# rpm -i http://172.23.120.24/builds/latestbuilds/couchbase-server/watson/196/couchbase-server-enterprise-4.1.0-196-centos7.x86_64.rpm
Minimum RAM required : 4 GB
System RAM configured : 3.79 GB

Minimum number of processors required : 4 cores
Number of processors on the system : 4 cores

Starting couchbase-server

You have successfully installed Couchbase Server.
Please browse to http://localhost.localdomain:8091/ to configure your server.
Please refer to http://couchbase.com for additional resources.

Please note that you have to update your firewall configuration to
allow connections to the following ports: 11211, 11210, 11209, 4369,
8091, 8092, 8093, 9100 to 9105, 9998, 18091, 18092, 11214, 11215 and
from 21100 to 21299.

By using this software you agree to the End User License Agreement.
See /opt/couchbase/LICENSE.txt.

[root@localhost ~]# /etc/init.d/couchbase-server status
couchbase-server is not running
[root@localhost ~]# /etc/init.d/couchbase-server start
Starting couchbase-server

[root@localhost ~]# /etc/init.d/couchbase-server status
couchbase-server is not running

It should not have installed centos7 version on centos6 machine. There should have been a message/error displayed in the beginning.