Elijah Rippeth

@robyn-kozierok I'm using a Mac (OS X 10.11). I set the `log.path` so now I'm not getting the `NullPointerException`, but I'm still getting the `ClassNotFoundException` for `org.mitre.muc.callisto.MUCMixedTask`.

@robyn-kozierok It doesn't, but it's a bit unexpected for an exception to arise unless something is going wrong.

It seems like these unix commands could be replaced with pure Python code. Would you entertain a PR to do that?

Thanks for the update, @laurencer. Does this mean `torchdata` as a domain library or the entire concept of datapipes/`DataLoader2` is under review?