Timeout of parallel magics

I would like to be able to set a timeout PX magics with running in blocked mode. Currently the cell can run infinitely which is problematic in our use case: we rely on MPI and barriers, and if one worker fails, the barrier holds up all the other workers, making the cell “freeze” infinitely. The only option is to visually observe this and infer that this happened from other sources (log files, etc) and kill the ipyparallel engines.