Github user aa8y commented on the pull request:
https://github.com/apache/spark/pull/12653#issuecomment-214010191
I still feel like it is compiling with 2.11 looking at the output on the
console. But it did fail, unable to resolve a library dependency, with the
version set to 2.10
```
> ./dev/change-scala-version.sh 2.10
./dev/../assembly/pom.xml
...
./dev/../docs/_plugins/copy_api_dirs.rb
```
```
> ./build/sbt -Pscala-2.10 clean compile
Java HotSpot(TM) 64-Bit Server VM warning: ignoring option
MaxPermSize=512m; support was removed in 8.0
...
[info] Resolving org.scala-lang.modules#scala-async_2.11;0.9.1 ...
...
[info] Resolving org.scala-lang.modules#scala-xml_2.11;1.0.2 ...
...
[info] Packaging
/Users/aallamsetty/code/spark-fork/mllib-local/target/scala-2.11/spark-mllib-local_2.11-2.0.0-SNAPSHOT.jar
...
...
[info] Resolving org.scala-lang#jline;2.11.8 ...
[warn] module not found: org.scala-lang#jline;2.11.8
[warn] ==== public: tried
[warn]
https://repo1.maven.org/maven2/org/scala-lang/jline/2.11.8/jline-2.11.8.pom
[warn] ==== Maven2 Local: tried
[warn]
file:/Users/aallamsetty/.m2/repository/org/scala-lang/jline/2.11.8/jline-2.11.8.pom
[warn] ==== local: tried
[warn]
/Users/aallamsetty/.ivy2/local/org.scala-lang/jline/2.11.8/ivys/ivy.xml
[info] Resolving jline#jline;2.12.1 ...
[warn] ::::::::::::::::::::::::::::::::::::::::::::::
[warn] :: UNRESOLVED DEPENDENCIES ::
[warn] ::::::::::::::::::::::::::::::::::::::::::::::
[warn] :: org.scala-lang#jline;2.11.8: not found
[warn] ::::::::::::::::::::::::::::::::::::::::::::::
[info] Resolving org.scala-lang#scala-library;2.11.8 ...
[warn]
[warn] Note: Unresolved dependencies path:
[warn] org.scala-lang:jline:2.11.8
((com.typesafe.sbt.pom.MavenHelper) MavenHelper.scala#L76)
[warn] +- org.apache.spark:spark-repl_2.11:2.0.0-SNAPSHOT
[info] Resolving jline#jline;2.12.1 ...
[info] Done updating.
...
sbt.ResolveException: unresolved dependency: org.scala-lang#jline;2.11.8:
not found
at sbt.IvyActions$.sbt$IvyActions$$resolve(IvyActions.scala:313)
...
at java.lang.Thread.run(Thread.java:745)
[error] (repl/*:update) sbt.ResolveException: unresolved dependency:
org.scala-lang#jline;2.11.8: not found
[error] Total time: 230 s, completed Apr 24, 2016 11:56:05 AM
```
which doesn't seem to be a problem when compiled with 2.11 in a similar
manner.
```
> ./dev/change-scala-version.sh 2.11
./dev/../assembly/pom.xml
...
./dev/../docs/_plugins/copy_api_dirs.rb
```
```
> ./build/sbt -Pscala-2.11 clean compile
Java HotSpot(TM) 64-Bit Server VM warning: ignoring option
MaxPermSize=512m; support was removed in 8.0
...
[warn] 81 warnings found
[success] Total time: 193 s, completed Apr 24, 2016 12:00:06 PM
```
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