Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/21422#discussion_r190525438
--- Diff: docs/building-spark.md ---
@@ -92,10 +92,10 @@ like ZooKeeper and Hadoop itself.
./build/mvn -Pmesos -DskipTests clean package
## Building for Scala 2.10
-To produce a Spark package compiled with Scala 2.10, use the
`-Dscala-2.10` property:
+To produce a Spark package compiled with Scala 2.10, use the
`-Pscala-2.10` property:
./dev/change-scala-version.sh 2.10
- ./build/mvn -Pyarn -Dscala-2.10 -DskipTests clean package
+ ./build/mvn -Pyarn -scala-2.10 -DskipTestsP clean package
--- End diff --
DskipTestsP?
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