Github user nchammas commented on a diff in the pull request: https://github.com/apache/spark/pull/2014#discussion_r17546110 --- Diff: docs/building-spark.md --- @@ -159,4 +160,13 @@ then ship it over to the cluster. We are investigating the exact cause for this. The assembly jar produced by `mvn package` will, by default, include all of Spark's dependencies, including Hadoop and some of its ecosystem projects. On YARN deployments, this causes multiple versions of these to appear on executor classpaths: the version packaged in the Spark assembly and the version on each node, included with yarn.application.classpath. The `hadoop-provided` profile builds the assembly without including Hadoop-ecosystem projects, like ZooKeeper and Hadoop itself. +# Building with SBT +Maven is the official recommendation for packaging Spark, and is the "build of reference". +But SBT is supported for day-to-day development since it can provide much faster iterative +compilation. More advanced developers may wish to use SBT. + +The SBT build is derived from the Maven POM files, and so the same Maven profiles and variables +can be set to control the SBT build. For example: + + sbt -Pyarn -Phadoop-2.3 compile --- End diff -- Do we need to add a bit more color here about how to use `sbt`, to match what used to be in the GitHub README? Or is this sufficient?
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