From f154ea021b1502a0045d7690ac9d9f1ee903b183 Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@apache.org>
Date: Tue, 3 Jun 2014 17:37:50 -0700
Subject: [PATCH] Added a comment on the value bound for testing.

---
 .../test/scala/org/apache/spark/rdd/PairRDDFunctionsSuite.scala | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/core/src/test/scala/org/apache/spark/rdd/PairRDDFunctionsSuite.scala b/core/src/test/scala/org/apache/spark/rdd/PairRDDFunctionsSuite.scala
index 461ffeddbff2a..b9bcc7c1321c3 100644
--- a/core/src/test/scala/org/apache/spark/rdd/PairRDDFunctionsSuite.scala
+++ b/core/src/test/scala/org/apache/spark/rdd/PairRDDFunctionsSuite.scala
@@ -121,6 +121,8 @@ class PairRDDFunctionsSuite extends FunSuite with SharedSparkContext {
      */
     val p = 20
     val sp = 0
+    // When p = 20, the relative accuracy is about 0.001. So with high probability, the
+    // relative error should be smaller than the threshold 0.005 we use here.
     val relativeSD = 0.01
 
     // For each value i, there are i tuples with first element equal to i.