Description of problem:
When virt-who is running on the CLI , it need to press "ctrl+c" key more than one time to kill the running virt-who, And it will generate some error log in the terminal when press "ctrl+c" at the first time.

Version-Release number of selected component (if applicable):
virt-who-0.9-2.el5
subscription-manager-1.8.22-1.el5
python-rhsm-1.8.18-1.el5

How reproducible:
Always

Steps to Reproduce:
1. Register system to SAM server and make sure virt-who stopped
#[root@dhcp-128-110 ~]# service virt-who status
virt-who is stopped
2. On the terminal1, run virt-who.
[root@dhcp-128-110 libvirt-test-API]# virt-who -i 3 -d
3. Kill the running virt-who with press "ctrl+c" on the terminal1.
4. Check the virt-who stauts on the terminal2, virt-who still run normally
#[root@dhcp-128-110 ~]# ps -ef|grep python
root      2190     1  0 Apr24 ?        00:00:00 /usr/bin/python ./hpssd.py
root      2644     1  0 Apr24 ?        00:00:00 /usr/bin/python -tt /usr/sbin/yum-updatesd
root      3088     1  0 Apr24 ?        00:00:00 /usr/bin/python -tt /usr/bin/puplet
root     32019 22088  0 22:21 pts/2    00:00:00 /usr/bin/python /usr/share/virt-who/virt-who.py -i 10 -d
root     32030  3383  0 22:22 pts/3    00:00:00 grep python

Actual results:
After step3, It can't kill the running virt-who and it will generate some error log in the terminal1 
WARNING: Listening for events is not available in VDSM, ESX, RHEV-M or Hyper-V mode
DEBUG: Virt-who is running in libvirt mode
DEBUG: Starting infinite loop with 3 seconds interval
DEBUG: Sending list of uuids: []
ERROR: Error in communication with subscription manager, trying to recover:
Traceback (most recent call last):
  File "/usr/share/virt-who/virt-who.py", line 205, in _send
    self.subscriptionManager.sendVirtGuests(virtualGuests)
  File "/usr/share/virt-who/subscriptionmanager.py", line 84, in sendVirtGuests
    self.connection.updateConsumer(self.uuid(), guest_uuids=uuids)
  File "/usr/lib64/python2.4/site-packages/rhsm/connection.py", line 717, in updateConsumer
    ret = self.conn.request_put(method, params)
  File "/usr/lib64/python2.4/site-packages/rhsm/connection.py", line 490, in request_put
    return self._request("PUT", method, params)
  File "/usr/lib64/python2.4/site-packages/rhsm/connection.py", line 429, in _request
    response = conn.getresponse()
  File "/usr/lib64/python2.4/httplib.py", line 872, in getresponse
    response.begin()
  File "/usr/lib64/python2.4/httplib.py", line 336, in begin
    version, status, reason = self._read_status()
  File "/usr/lib64/python2.4/httplib.py", line 294, in _read_status
    line = self.fp.readline()
  File "/usr/lib64/python2.4/socket.py", line 325, in readline
    data = recv(1)
  File "/usr/lib64/python2.4/site-packages/M2Crypto/SSL/Connection.py", line 217, in read
    return self._read_bio(size)
  File "/usr/lib64/python2.4/site-packages/M2Crypto/SSL/Connection.py", line 202, in _read_bio
    return m2.ssl_read(self.ssl, size, self._timeout)
  File "/usr/share/virt-who/virt-who.py", line 339, in cleanup
    sys.exit(0)
SystemExit: 0
DEBUG: Sending list of uuids: []
DEBUG: Sending list of uuids: []
DEBUG: Sending list of uuids: []
DEBUG: Sending list of uuids: []

Expected results:
It should kill the running virt-who after press "ctrl+c" one time, and it shouldn't generate any error log on the terminal

Additional info:
It hasn't this problem in the RHEL7