It's weird, it just says "Killed". Do you have anything running that may kill processes that may look unresponsive or too system heavy? I know some people set up linux to try and be as smooth as possible. For example I had a server I was troubleshooting, their minecraft server kept shutting off for no reason, turned out they had a program that killed tasks that used 100% of the CPU for more than 6 seconds. Lol Quickly explained why if they did anything with TNT, the server just shut off entirely.