in this commit 8301fadd8d269da11e72870b7a889596e3337839 Author: Marcelo Vanzin <van...@cloudera.com> Date: Mon Mar 14 14:27:33 2016 -0700 [SPARK-13626][CORE] Avoid duplicate config deprecation warnings.
the following change was made -class SparkConf(loadDefaults: Boolean) extends Cloneable with Logging { +class SparkConf private[spark] (loadDefaults: Boolean) extends Cloneable with Logging { i use the constructor new SparkConf(false) to build a SparkConf for our in-house unit tests (where i do not want system properties to change meddle with things). is this API change on purpose?