I'm trying to run a minecraft server jar with a batch file and it works fine until I join, and then it closes.
MC-82215
Server crashes when user joins
Resolved
Duplicate
0
Thank you for your report.
However, your ticket has been resolved as a duplicate.
This issue has been linked to the original bugreport: MC-77989. You can find or add further information on that report.
Please search before reporting any bugs, as it's likely that one exists already.