rsyslog is not able to request host TGT kerberos ticket on RHEL6

Issue

If the system does not have a valid TGT and/or host ticket on the client or server, rsyslog does not correctly contact the kdc to refresh the tickets (/var/log/krb5kdc.log)

krb5kdc[2116](info): TGS_REQ (4 etypes {18 17 16 23}) 192.168.1.3: PROCESS_TGS: authtime 0, <unknown client> for <unknown server>, Ticket expired.

The administrator has to run kinit -k manually on the client and/or server to refresh the TGT.