apache/spark — pull request #58 by CodingCat (2014-03-03 02:29:49+00:00)
Title: SPARK-1156: allow user to login into a cluster without slaves

Reported in https://spark-project.atlassian.net/browse/SPARK-1159

The current spark-ec2 script doesn't allow user to login to a cluster without slaves. One of the issues brought by this behaviour is that when all the worker died, the user cannot even login to the cluster for debugging, etc.