wtf amazon https://docs.aws.amazon.com/emr/latest/ManagementGuide/AddMoreThan256Steps.html “oh, you’d like to run more than 256 things on your long-running cluster? ¯\_(ツ)_/¯” all of their suggestions for how to deal with this are nuts… “just SSH to the master and manually submit things!” (with PuTTY of course)