IPA: ipa-replica-prepare command failing in IPA master

Issue

• IPA: ipa-replica-prepare command failing in IPA master with below error.

ipa: DEBUG: Connecting: 192.168.2.2:0
ipa: DEBUG: approved_usage = SSL Server intended_usage = SSL Server
ipa: DEBUG: cert valid True for "CN=ipaserver01.example.com,O=EXAMPLE.COM"
ipa: DEBUG: handshake complete, peer = 192.168.2.2:8443
ipa: DEBUG: Protocol: TLS1.2
ipa: DEBUG: Cipher: TLS_RSA_WITH_AES_256_CBC_SHA
ipa: DEBUG: response status 200 OK
ipa: DEBUG: response headers {'date': 'Wed, 30 Mar 2016 09:15:43 GMT', 'content-length': '0', 'server': 'Apache-Coyote/1.1'}
ipa: DEBUG: response body ''
ipa.ipaserver.install.ipa_replica_prepare.ReplicaPrepare: DEBUG:   File "/usr/lib/python2.7/site-packages/ipapython/admintool.py", line 171, in execute
    return_value = self.run()
  File "/usr/lib/python2.7/site-packages/ipaserver/install/ipa_replica_prepare.py", line 337, in run
    self.copy_ds_certificate()
  File "/usr/lib/python2.7/site-packages/ipaserver/install/ipa_replica_prepare.py", line 382, in copy_ds_certificate
    self.export_certdb("dscert", passwd_fname)
  File "/usr/lib/python2.7/site-packages/ipaserver/install/ipa_replica_prepare.py", line 589, in export_certdb
    db.create_server_cert(nickname, hostname, ca_db)
  File "/usr/lib/python2.7/site-packages/ipaserver/install/certs.py", line 337, in create_server_cert
    cdb.issue_server_cert(self.certreq_fname, self.certder_fname)
  File "/usr/lib/python2.7/site-packages/ipaserver/install/certs.py", line 413, in issue_server_cert
    doc = xml.dom.minidom.parseString(http_body)
  File "/usr/lib64/python2.7/xml/dom/minidom.py", line 1931, in parseString
    return expatbuilder.parseString(string)
  File "/usr/lib64/python2.7/xml/dom/expatbuilder.py", line 940, in parseString
    return builder.parseString(string)
  File "/usr/lib64/python2.7/xml/dom/expatbuilder.py", line 223, in parseString
    parser.Parse(string, True)

ipa.ipaserver.install.ipa_replica_prepare.ReplicaPrepare: DEBUG: The ipa-replica-prepare command failed, exception: ExpatError: no element found: line 1, column 0
ipa.ipaserver.install.ipa_replica_prepare.ReplicaPrepare: ERROR: no element found: line 1, column 0