Controlling output of jobs run with gnu parallel

Question

On my old machine with gnu parallel version 20121122 after I

parallel -j 15 < jobs.txt

I see output of the jobs being run which is very handy for debug purposes.

On my new machine with parallel version 20140122 then I execute above-mentioned command I see nothing in the terminal.

From another SO thread I found out about --tollef flag which fixes problem for me, but soon it is to be retired. How do I keep things working after retirement of --tollef flag?

Answer 1

--ungroup (if half-lines are allowed to mix - as they are with --tollef).

--line-buffer (if you only want complete lines printed - i.e. no half-line mixing).