after upgrading from JIRA 5.1 to JIRA 6.3.12 services are not starting

Question

I am upgraded from JIRA 5.1 to JIRA 6.3.12 and it finished without any errors. But after finishing, JIRA services is not running and when checked in Windows Services console it showing services is not started. When tried to start it, it throws an error saying files doesn't exist. Please confirm whether I need to restore the old version JIRA backup in the new version or something like that.

Thanks..

Nic Brough -Adaptavist- · Answer

Right, and have you looked at the logs to see if there are any errors that might explain it?

Suresh Kumar G · Answer

I started upgrading after going through the following link:-
https://confluence.atlassian.com/display/JIRA/Upgrading+JIRA+Using+a+Rapid+Upgrade+Method

Nic Brough -Adaptavist- · Answer

I was not asking for the files, I was suggesting that you start by reading them yourself.