Github user pwendell commented on a diff in the pull request:
https://github.com/apache/spark/pull/2615#discussion_r19324296
--- Diff: conf/spark-env.sh.template ---
@@ -3,6 +3,9 @@
# This file is sourced when running various Spark programs.
# Copy it as spark-env.sh and edit that to configure Spark for your site.
+# Uncomment this if you plan to use scala 2.11
+# SCALA_VERSION=2.11
--- End diff --
I just don't want to put it in this because many users look at this and it
will confuse them. We will publish separate spark binaries for Scala 2.10 and
2.11, so most users won't ever want to set this. We can include it in developer
documentation somewhere else.
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