Repository: spark
Updated Branches:
  refs/heads/branch-2.3 45761ceb2 -> ce0fbec68


[SPARK-23769][CORE] Remove comments that unnecessarily disable Scalastyle check

## What changes were proposed in this pull request?

We re-enabled the Scalastyle checker on a line of code. It was previously 
disabled, but it does not violate any of the rules. So there's no reason to 
disable the Scalastyle checker here.

## How was this patch tested?

We tested this by running `build/mvn scalastyle:check` after removing the 
comments that disable the checker. This check passed with no errors or warnings 
for Spark Core
```
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building Spark Project Core 2.4.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- scalastyle-maven-plugin:1.0.0:check (default-cli)  spark-core_2.11 
---
Saving to outputFile=<path to local dir>/spark/core/target/scalastyle-output.xml
Processed 485 file(s)
Found 0 errors
Found 0 warnings
Found 0 infos
```
We did not run all tests (with `dev/run-tests`) since this Scalastyle check 
seemed sufficient.

## Co-contributors:
chialun-yeh
Hrayo712
vpourquie

Author: arucard21 <arucar...@gmail.com>

Closes #20880 from arucard21/scalastyle_util.

(cherry picked from commit 6ac4fba69290e1c7de2c0a5863f224981dedb919)
Signed-off-by: hyukjinkwon <gurwls...@apache.org>


Project: http://git-wip-us.apache.org/repos/asf/spark/repo
Commit: http://git-wip-us.apache.org/repos/asf/spark/commit/ce0fbec6
Tree: http://git-wip-us.apache.org/repos/asf/spark/tree/ce0fbec6
Diff: http://git-wip-us.apache.org/repos/asf/spark/diff/ce0fbec6

Branch: refs/heads/branch-2.3
Commit: ce0fbec6857a09b095c492bb93d9ebaaa1e5c074
Parents: 45761ce
Author: arucard21 <arucar...@gmail.com>
Authored: Fri Mar 23 21:02:34 2018 +0900
Committer: hyukjinkwon <gurwls...@apache.org>
Committed: Fri Mar 23 21:02:46 2018 +0900

----------------------------------------------------------------------
 .../scala/org/apache/spark/storage/BlockReplicationPolicy.scala  | 4 +---
 .../main/scala/org/apache/spark/util/CompletionIterator.scala    | 2 --
 2 files changed, 1 insertion(+), 5 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/spark/blob/ce0fbec6/core/src/main/scala/org/apache/spark/storage/BlockReplicationPolicy.scala
----------------------------------------------------------------------
diff --git 
a/core/src/main/scala/org/apache/spark/storage/BlockReplicationPolicy.scala 
b/core/src/main/scala/org/apache/spark/storage/BlockReplicationPolicy.scala
index 353eac6..0bacc34 100644
--- a/core/src/main/scala/org/apache/spark/storage/BlockReplicationPolicy.scala
+++ b/core/src/main/scala/org/apache/spark/storage/BlockReplicationPolicy.scala
@@ -54,10 +54,9 @@ trait BlockReplicationPolicy {
 }
 
 object BlockReplicationUtils {
-  // scalastyle:off line.size.limit
   /**
    * Uses sampling algorithm by Robert Floyd. Finds a random sample in O(n) 
while
-   * minimizing space usage. Please see <a 
href="http://math.stackexchange.com/questions/178690/whats-the-proof-of-correctness-for-robert-floyds-algorithm-for-selecting-a-sin";>
+   * minimizing space usage. Please see <a 
href="https://math.stackexchange.com/q/178690";>
    * here</a>.
    *
    * @param n total number of indices
@@ -65,7 +64,6 @@ object BlockReplicationUtils {
    * @param r random number generator
    * @return list of m random unique indices
    */
-  // scalastyle:on line.size.limit
   private def getSampleIds(n: Int, m: Int, r: Random): List[Int] = {
     val indices = (n - m + 1 to n).foldLeft(mutable.LinkedHashSet.empty[Int]) 
{case (set, i) =>
       val t = r.nextInt(i) + 1

http://git-wip-us.apache.org/repos/asf/spark/blob/ce0fbec6/core/src/main/scala/org/apache/spark/util/CompletionIterator.scala
----------------------------------------------------------------------
diff --git a/core/src/main/scala/org/apache/spark/util/CompletionIterator.scala 
b/core/src/main/scala/org/apache/spark/util/CompletionIterator.scala
index 31d230d..21acaa9 100644
--- a/core/src/main/scala/org/apache/spark/util/CompletionIterator.scala
+++ b/core/src/main/scala/org/apache/spark/util/CompletionIterator.scala
@@ -22,9 +22,7 @@ package org.apache.spark.util
  * through all the elements.
  */
 private[spark]
-// scalastyle:off
 abstract class CompletionIterator[ +A, +I <: Iterator[A]](sub: I) extends 
Iterator[A] {
-// scalastyle:on
 
   private[this] var completed = false
   def next(): A = sub.next()


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