It looks like your krb5.conf is missing the default realm setting. Is the 
machine you are running commands from joined?

Either way kinit [email protected] should work. The uppercase matters for 
Kerberos.

> On Nov 9, 2017, at 8:53 PM, None via FreeIPA-users 
> <[email protected]> wrote:
> 
>  Dear,
> 
> I am trying to install replica by "ipa-replica-install 
> replica-info-namenode2.hadoop.gxdwdc.gpg" but it failed,
> 
> ipa-replica-install replica-info-namenode2.hadoop.gxdwdc.gpg
> ...
> The host namenode2.hadoop.gxdwdc already exists on the master server.
> You should remove it before procedding:
>         % ipa host-del namenode2.hadoop.gxdwdc
> 
> Then I ran "ipa -host-del namenode2.hadoop.gxdwdc" but it still failed,
> [root@namenode2 ~] ipa host-del namenode2.hadoop.gxdwdc
> ipa: ERROR: did not receive Kerberos credentials
> 
> I thought i need to run "kinit" first, than I ran "kinit admin", it still 
> failed,
> [root@namenode2 ~] kinit admin
> kinit: Configuration file does not sepcify default realm when parsing name 
> admin
> 
> can anyone inform me how can i overcome this issue?
> 
> Thanks ahead.
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