IPA: Server upgrade using command ipa-server-upgrade is hanging indefinetly

Issue

• IPA: Server upgrade using command ipa-server-upgrade is hanging indefinetly
• During hang file /var/log/ipaupgrade.log is showing below message.

ipa.ipaserver.install.ldapupdate.LDAPUpdate: DEBUG:     nsIndex
ipa.ipaserver.install.ldapupdate.LDAPUpdate: DEBUG: nsMatchingRule:
ipa.ipaserver.install.ldapupdate.LDAPUpdate: DEBUG:     caseIgnoreIA5Match
ipa.ipaserver.install.ldapupdate.LDAPUpdate: DEBUG:     caseExactIA5Match
ipa.ipaserver.install.ldapupdate.LDAPUpdate: DEBUG: cn:
ipa.ipaserver.install.ldapupdate.LDAPUpdate: DEBUG:     krbPrincipalName
ipa.ipaserver.install.ldapupdate.LDAPUpdate: DEBUG: nsSystemIndex:
ipa.ipaserver.install.ldapupdate.LDAPUpdate: DEBUG:     false
ipa.ipaserver.install.ldapupdate.LDAPUpdate: DEBUG: [(2, u'nsMatchingRule', ['caseIgnoreIA5Match', 'caseExactIA5Match'])]
ipa.ipaserver.install.ldapupdate.LDAPUpdate: DEBUG: Updated 1
ipa.ipaserver.install.ldapupdate.LDAPUpdate: DEBUG: Done
ipa.ipaserver.install.ldapupdate.LDAPUpdate: DEBUG: Creating task to index attribute: krbPrincipalName
ipa.ipaserver.install.ldapupdate.LDAPUpdate: DEBUG: Task id: cn=indextask_krbPrincipalName_137071185835325620_8892,cn=index,cn=tasks  n=config

[root@server1 ~]# KRB5_TRACE=/dev/stdout kinit admin@EXAMPLE.COM
[21388] 1488171062.18660: Getting initial credentials for admin@EXAMPLE.COM
[21388] 1488171062.21580: Sending request (173 bytes) to EXAMPLE.COM
[21388] 1488171062.22300: Resolving hostname server1.example.com
[21388] 1488171062.26231: Initiating TCP connection to stream 192.168.2.2:88
[21388] 1488171062.26540: Sending TCP request to stream 192.168.2.2:88
[21388] 1488171062.28674: Received answer (181 bytes) from stream 192.168.2.2:88
[21388] 1488171062.28733: Terminating TCP connection to stream 192.168.2.2:88
[21388] 1488171062.28811: Response was from master KDC
[21388] 1488171062.28840: Received error from KDC: -1765328378/Client not found in Kerberos database
kinit: Client 'admin@EXAMPLE.COM' not found in Kerberos database while getting initial credentials

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