Ive been having this issue for quite a long time. When coding in Java my IDE (Eclipse) will not allow me to create JAR file.
Ive googled quite alot only to see there is no direct solution to this and the causing factor may be Win8.1. I thought - ok no problem. Got myself a VirtualBox, scrapped Manjaro (Arch derrativate) and installed Eclipse from pacman (brand new edition), imported project. It runs ok, when I try to create JAR, it crashes. Logfile (var/log/eclipse/jarfile.log) is empty.