apache/spark — pull request #859 by pwendell (2014-05-23 08:16:02+00:00)
Title: SPARK-1911: Emphasize that Spark jars should be built with Java 6.

This commit requires the user to manually say "yes" when buiding Spark
without Java 6. The prompt can be bypassed with a flag (e.g. if the user
is scripting around make-distribution).