So we're planning to roll up our 5.0.23 server to 6.0.8 on Wednesday night, and I wanted to just test out the update using a P2V copy of our physical mail server. I assigned it a DHCP address, and fired it up. After running the installer on the virtual machine, when it gets to the verification of the database it gives me this error:

/opt/zimbra/mysql/bin/mysqlcheck: Got error: 2002: Can't connect to local MySQL server through socket '/opt/zimbra/db/mysql.sock' (2) when trying to connect
No errors found
command failed

I can carry on, but eventually it will die here:

Starting mysql...done.
UPGRADE FAILED - exiting.


Is this a bad way to test the upgrade of my server?