Git history to the rescue! It seems to have been added by Matei way back in July 2012: https://github.com/apache/spark/commit/5d1a887bed8423bd6c25660910d18d91880e01fe
and then was removed a few months later (replaced by RUNNING) by the same Mr. Zaharia: https://github.com/apache/spark/commit/bb1bce79240da22c2677d9f8159683cdf73158c2#diff-776a630ac2b2ec5fe85c07ca20a58fc0 So I'd say it's safe to delete it. On Wed, Jul 9, 2014 at 2:36 PM, Mark Hamstra <m...@clearstorydata.com> wrote: > Doesn't look to me like this is used. Does anybody recall what it was > intended for? >