[SPARK-10556] SBT build explicitly sets Scala version, which can conflict with SBT's own scala version - ASF JIRA

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Details

Type: Bug
Status: Resolved
Priority: Minor
Resolution: Fixed
Affects Version/s: None
Fix Version/s: 1.3.2, 1.4.2, 1.5.1, 1.6.0
Component/s: Build
Labels:
None

Description

project/plugins.sbt explicitly sets scalaVersion to 2.10.4. This can cause issues when using a version of sbt that is compiled against a different version of Scala (for example sbt 0.13.9 uses 2.10.5). Removing this explicit setting will cause build files to be compiled and run against the same version of Scala that sbt is compiled against.

Note that this only applies to the project build files (items in project/), it is distinct from the version of Scala we target for the actual spark compilation.