EDIT: Oh, and before you go running around trying the insane newbie suggestions below...take a look at the upgrade log files and see if there is something mentioned in there that indicates what the source of the problem might be.
I'm not really one to give any really helpful suggestions since I don't have much experience with Zimbra or Linux, but if I were in your shoes, the 1st thing I'd try is to create a new install of CentOS with the same version as your production system. Then install the same Zimbra 6.0.14 on the new server and make sure it can spin up. Then copy over the opt folder to the new server and see if you can spin it up. If so, try the upgrade on that server to rule out any problems with the OS or things that might have changed over time.
If that doesn't work, I'd look at doing the same thing so you get a fresh install of the CentOS and Zimbra that matches your production...but do not copy production data. Just see if you can upgrade the empty 6.0.14 version to 7.1.3. If that fails, you know it isn't the data...but the process somehow.
LHammonds |