VCSA upgrade from 6.7 to 7 fails with "A problem occurred while getting data from the source vCenter server"

Error :

While the upgrade from vCenter server from 6.7 to 7.x fails with:

A problem occurred while getting data from the source vCenter server

Solution:

This occurs when the VCSA root password expired. 

Follow the below steps to resolve 

Verify the password expired using login to VCSA using root credential and access shell

• shell.set --enabled true
• shell

root@photon-machine [ ~ ]# chage -l root

You are required to change your password immediately (password aged)

change: PAM: Authentication token is no longer valid; new one required

Change password

root@photon-machine [ ~ ]# passwd root

New password:

Retype new password:

passwd: password updated successfully

Make password never expires using:

root@photon-machine [ ~ ]# chage -I -1 -m 0 -M 99999 -E -1 root

root@photon-machine [ ~ ]#