rhn-profile-sync and rhnreg_ks fails with "An error has occurred: Error communicating with server" OR "Internal Server Error".

Issue

• rhn-profile-sync fails with below traceback :

Traceback (most recent call last):
  File "/usr/sbin/rhn-profile-sync", line 56, in <module>
    cli.run()
  File "/usr/share/rhn/up2date_client/rhncli.py", line 96, in run
    sys.exit(self.main() or 0)
  File "/usr/sbin/rhn-profile-sync", line 44, in main
    rhnPackageInfo.updatePackageProfile()
  File "/usr/share/rhn/up2date_client/rhnPackageInfo.py", line 28, in updatePackageProfile
    s.registration.update_packages(up2dateAuth.getSystemId(), packages)
  File "/usr/share/rhn/up2date_client/rhnserver.py", line 63, in __call__
    return rpcServer.doCall(method, *args, **kwargs)
  File "/usr/share/rhn/up2date_client/rpcServer.py", line 204, in doCall
    ret = method(*args, **kwargs)
  File "/usr/lib64/python2.7/xmlrpclib.py", line 1224, in __call__
    return self.__send(self.__name, args)
  File "/usr/share/rhn/up2date_client/rpcServer.py", line 38, in _request1
    ret = self._request(methodname, params)
  File "/usr/lib/python2.7/site-packages/rhn/rpclib.py", line 384, in _request
    self._handler, request, verbose=self._verbose)
  File "/usr/lib/python2.7/site-packages/rhn/transports.py", line 171, in request
    headers, fd = req.send_http(host, handler)
  File "/usr/lib/python2.7/site-packages/rhn/transports.py", line 730, in send_http
    response.status, response.reason, response.msg)
<class 'up2date_client.up2dateErrors.CommunicationError'>: Error communicating with server. The message was:
Internal Server Error

• Registration of client system to Red Hat Satellite server fails with below "Internal Server Error"

Traceback (most recent call last):
  File "/usr/sbin/rhnreg_ks", line 227, in ?
    cli.run()
  File "/usr/share/rhn/up2date_client/rhncli.py", line 66, in run
    sys.exit(self.main() or 0)
  File "/usr/sbin/rhnreg_ks", line 160, in main
    rhnreg.sendPackages(systemId, packageList)
  File "/usr/share/rhn/up2date_client/rhnreg.py", line 671, in sendPackages
    s.registration.add_packages(systemId, packageList)
  File "/usr/share/rhn/up2date_client/rhnserver.py", line 50, in __call__
    return rpcServer.doCall(method, *args, **kwargs)
  File "/usr/share/rhn/up2date_client/rpcServer.py", line 274, in doCall
    raise up2dateErrors.CommunicationError(e.errmsg)
up2date_client.up2dateErrors.CommunicationError: Internal Server Error

~~~