Building spark submodule source code

[Tenghuan He]

Hi everyone,

    I am trying to add a new method to spark RDD. After changing the code
of RDD.scala and running the following command
    mvn -pl :spark-core_2.10 -DskipTests clean install
    It BUILD SUCCESS, however, when starting the bin\spark-shell, my method
cannot be found.
    Do I have to rebuild the whole spark project instead the spark-core
submodule to make the changes work?
    Rebuiling the whole project is too time consuming, is there any better
choice?


Thanks & Best Regards

Tenghuan He