Cluster Login Fails Because Native Kerberos Is Installed on Cluster Nodes

Symptom

Users fail to log in to the cluster or change the password after the MRS cluster has been installed.

Cause Analysis

1. Log in to the Kerberos service node of the cluster and view /var/log/Bigdata/kerberos/krb5kdc.log.
2. Log in to the active and standby OMS nodes and view /var/log/Bigdata/okerberos/oms-krb5kdc.log.

   It is found that there are lots of authentication failures and error message "<unknown client> for <unknown server>" is displayed.

3. According to the check, the authentication exception is caused by the native Kerberos installed on the node.

   Run the rpm -qa | grep krb5 command to check whether krb5-workstation-1.10.3-33.el6.x86_64 exists.

Procedure

1. Run the following command to uninstall the software and its dependency software.

   rpm -e krb5-workstation-1.10.3-33.el6.x86_64

2. On the node where Kerberos is installed, run the kill -9 command to stop the Kerberos process. Wait until the Kerberos process is restarted.