Hi Murali, I found that the table "netscaler_pod_ref" (introduced with your checkin 3b1aca19) is missing on the upgraded setups. The table was introduced in 40, but it never was a part of 302->40 db upgrade. So for customers upgrading to 4.1 from 3.0.x, this table will be missed.
Could you please take a look in case I've missed the upgrade file where this table is present. Otherwise, it has to become a part of 40->41 upgrade as the code for the feature is present in 4.1 branch. -Alena.