Kishan, I was testing VPC on upgraded 4.2 system (the upgrade is done from 4.1 build), and found Critical DB upgrade bug caused by your commit 836ce6c1. This is MUST fix for 4.2 as a result of it, all existing VPCs will stop functioning after restart/router destroy.
https://issues.apache.org/jira/browse/CLOUDSTACK-4704 Can you please take a look. -Alena.
