Min RK

Do simple executions work? `rc[:].apply_sync(os.getpid)` and `view.apply_sync(os.getpid)`?

Can you call getpid before the code that's causing the problem?

Does `map` work with a simpler operation (start with echo, maybe return the same data type as your real task)? I'm trying to isolate the issue. A hang is certainly...

Can you include more code to reproduce the issue? Have you created the profile already (`ipython profile create ssh`)?

I'm sorry, I was sure I wrote a reply to this some time ago. I believe the crux is the combination of _relative_ profile directory and work directory, so it...

> I have to quickly cat ipengine-xxx.xxx.out files since they got removed right after process exits. These files are removed because the output is already retrieved. You can view it...

I can't see where this would be coming from. There isn't any `.__main__` attribute-access that I know of. The only `.__main__` I see in the code is in process startup...

Touching `__main__` via `sys.modules['__main__']` makes sense. What's weird to me is that it's an AttributeError, and I don't see a way for IPython to trigger access to main via _attr_...

@mmckerns it shouldn't be if `client.use_dill()` is working correctly, but that's a good data point, because that is what would happen if it is _not_ doing what it's supposed to....

I've thought quite a bit about this! I think it's a great idea. JupyterHub's Spawner design is based largely on learning from these Launchers, and I think is a good...