Add comment to address Aaron's review comment in #1648.

apache · Oct 6, 2014 · 1d67d9d · 1d67d9d
1 parent d16102d
commit 1d67d9d
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/core/src/main/scala/org/apache/spark/rdd/HadoopRDD.scala b/core/src/main/scala/org/apache/spark/rdd/HadoopRDD.scala
@@ -107,6 +107,8 @@ class HadoopRDD[K, V](
 
   // Returns a JobConf that will be used on slaves to obtain input splits for Hadoop reads.
   protected def createJobConf(): JobConf = {
+    // Each task gets its own deserialized copy of the HadoopRDD, and therefore gets its own copy
+    // of the configuration.
     val conf: Configuration = serializableConf.value
     conf match {
       case jobConf: JobConf =>