Oozie LB Connection Failed With GSSException: No valid credentials provided (Mechanism level: Failed to find any Kerberos credentails) Error

It is quite common from lots of Hadoop clusters that after enabling Load Balancer for certain services that have Kerberos already, the connection to those services via Load Balancer will fail. However, the direct connection to them will always successful. The typical errors returned looks like below: GSSException: No valid …