apache/spark — pull request #2085 by chesterxgchen (2014-08-21 20:55:37+00:00)
Title: Spark 3175: Branch-1.1 SBT build failed for Yarn-Alpha

The issue is that the yarn/alpha/pom.xml using 1.1.0 instead of 1.1.1-SNAPSHOT version.
update the pom.xml to 1.1.1-SNAPSHOT (same as yarn/stable/pom.xml)