Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/1256#discussion_r14668309
--- Diff: core/src/main/scala/org/apache/spark/SparkConf.scala ---
@@ -36,20 +38,27 @@ import scala.collection.mutable.HashMap
* Note that once a SparkConf object is passed to Spark, it is cloned and
can no longer be modified
* by the user. Spark does not support modifying the configuration at
runtime.
*
- * @param loadDefaults whether to also load values from Java system
properties
+ * @param loadDefaults whether to also load values from Java system
properties, file and resource
+ * @param fileName load properties from file
--- End diff --
You need to document above what's the order of precedence for options. From
the code, system properties > file > resource.
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