This answer is really not helpful and definitely seen as a brush off saying to users: "Get lost!!!"?? Like calling the bank and saying you can't access your funds, the support person tells you someone else is using your account, just have a look...?

The exception states a few things:
java.net.BindException: Address already in use
Database may be already in use: "Locked by another process".

As stated - NOTHING shown up on port 8989, AND can also confirm no other process it running. The installer failed, the command line option failed, no need to say"
"Looks like you already got another instance of NIS running or some other program is using the db."