Message6936

So a bit of googling reveals that jline can change your terminal settings, particularly the echo setting, which explains the behaviour you're seeing.

This jline message seems relevant

Why doesn't jline enable the echo after exit?
https://groups.google.com/forum/#!topic/jline-users/I8r3-UYnbQM

Particluarly, it looks like calling

jline.TerminalSupport.restore()

Might restore your terminal.

http://www.jarvana.com/jarvana/view/org/sonatype/jline/jline/2.3/jline-2.3-javadoc.jar!/jline/TerminalSupport.html

Can you give that a try? If it works, perhaps we'll have to add such a call to jython exit hooks, when jline is in use.