[SPARK-29401][CORE][ML][SQL][GRAPHX][TESTS] Replace calls to .parallelize Arrays of tuples, ambiguous in Scala 2.13, with Seqs of tuples

### What changes were proposed in this pull request?

Invocations like `sc.parallelize(Array((1,2)))` cause a compile error in 2.13, like:
```
[ERROR] [Error] /Users/seanowen/Documents/spark_2.13/core/src/test/scala/org/apache/spark/ShuffleSuite.scala:47: overloaded method value apply with alternatives:
  (x: Unit,xs: Unit*)Array[Unit] <and>
  (x: Double,xs: Double*)Array[Double] <and>
  (x: Float,xs: Float*)Array[Float] <and>
  (x: Long,xs: Long*)Array[Long] <and>
  (x: Int,xs: Int*)Array[Int] <and>
  (x: Char,xs: Char*)Array[Char] <and>
  (x: Short,xs: Short*)Array[Short] <and>
  (x: Byte,xs: Byte*)Array[Byte] <and>
  (x: Boolean,xs: Boolean*)Array[Boolean]
 cannot be applied to ((Int, Int), (Int, Int), (Int, Int), (Int, Int))
```
Using a `Seq` instead appears to resolve it, and is effectively equivalent.

### Why are the changes needed?

To better cross-build for 2.13.

### Does this PR introduce any user-facing change?

None.

### How was this patch tested?

Existing tests.

Closes #26062 from srowen/SPARK-29401.

Authored-by: Sean Owen <sean.owen@databricks.com>
Signed-off-by: Dongjoon Hyun <dhyun@apple.com>

core/src/test/scala/org/apache/spark/DistributedSuite.scala

@@ -77,7 +77,7 @@ class DistributedSuite extends SparkFunSuite with Matchers with LocalSparkContex
 
   test("simple groupByKey") {
     sc = new SparkContext(clusterUrl, "test")
-    val pairs = sc.parallelize(Array((1, 1), (1, 2), (1, 3), (2, 1)), 5)
+    val pairs = sc.parallelize(Seq((1, 1), (1, 2), (1, 3), (2, 1)), 5)
     val groups = pairs.groupByKey(5).collect()
     assert(groups.size === 2)
     val valuesFor1 = groups.find(_._1 == 1).get._2

core/src/test/scala/org/apache/spark/FileSuite.scala

@@ -372,7 +372,7 @@ class FileSuite extends SparkFunSuite with LocalSparkContext {
 
   test ("prevent user from overwriting the empty directory (old Hadoop API)") {
     sc = new SparkContext("local", "test")
-    val randomRDD = sc.parallelize(Array((1, "a"), (1, "a"), (2, "b"), (3, "c")), 1)
+    val randomRDD = sc.parallelize(Seq((1, "a"), (1, "a"), (2, "b"), (3, "c")), 1)
     intercept[FileAlreadyExistsException] {
       randomRDD.saveAsTextFile(tempDir.getPath)
     }
@@ -380,7 +380,7 @@ class FileSuite extends SparkFunSuite with LocalSparkContext {
 
   test ("prevent user from overwriting the non-empty directory (old Hadoop API)") {
     sc = new SparkContext("local", "test")
-    val randomRDD = sc.parallelize(Array((1, "a"), (1, "a"), (2, "b"), (3, "c")), 1)
+    val randomRDD = sc.parallelize(Seq((1, "a"), (1, "a"), (2, "b"), (3, "c")), 1)
     randomRDD.saveAsTextFile(tempDir.getPath + "/output")
     assert(new File(tempDir.getPath + "/output/part-00000").exists())
     intercept[FileAlreadyExistsException] {
@@ -392,7 +392,7 @@ class FileSuite extends SparkFunSuite with LocalSparkContext {
     val conf = new SparkConf()
     conf.setAppName("test").setMaster("local").set("spark.hadoop.validateOutputSpecs", "false")
     sc = new SparkContext(conf)
-    val randomRDD = sc.parallelize(Array((1, "a"), (1, "a"), (2, "b"), (3, "c")), 1)
+    val randomRDD = sc.parallelize(Seq((1, "a"), (1, "a"), (2, "b"), (3, "c")), 1)
     randomRDD.saveAsTextFile(tempDir.getPath + "/output")
     assert(new File(tempDir.getPath + "/output/part-00000").exists())
     randomRDD.saveAsTextFile(tempDir.getPath + "/output")

core/src/test/scala/org/apache/spark/PartitioningSuite.scala

@@ -262,11 +262,11 @@ class PartitioningSuite extends SparkFunSuite with SharedSparkContext with Priva
 
   test("defaultPartitioner") {
     val rdd1 = sc.parallelize((1 to 1000).map(x => (x, x)), 150)
-    val rdd2 = sc.parallelize(Array((1, 2), (2, 3), (2, 4), (3, 4)))
+    val rdd2 = sc.parallelize(Seq((1, 2), (2, 3), (2, 4), (3, 4)))
       .partitionBy(new HashPartitioner(10))
-    val rdd3 = sc.parallelize(Array((1, 6), (7, 8), (3, 10), (5, 12), (13, 14)))
+    val rdd3 = sc.parallelize(Seq((1, 6), (7, 8), (3, 10), (5, 12), (13, 14)))
       .partitionBy(new HashPartitioner(100))
-    val rdd4 = sc.parallelize(Array((1, 2), (2, 3), (2, 4), (3, 4)))
+    val rdd4 = sc.parallelize(Seq((1, 2), (2, 3), (2, 4), (3, 4)))
       .partitionBy(new HashPartitioner(9))
     val rdd5 = sc.parallelize((1 to 10).map(x => (x, x)), 11)
 
@@ -289,14 +289,14 @@ class PartitioningSuite extends SparkFunSuite with SharedSparkContext with Priva
       sc.conf.set("spark.default.parallelism", "4")
 
       val rdd1 = sc.parallelize((1 to 1000).map(x => (x, x)), 150)
-      val rdd2 = sc.parallelize(Array((1, 2), (2, 3), (2, 4), (3, 4)))
+      val rdd2 = sc.parallelize(Seq((1, 2), (2, 3), (2, 4), (3, 4)))
         .partitionBy(new HashPartitioner(10))
-      val rdd3 = sc.parallelize(Array((1, 6), (7, 8), (3, 10), (5, 12), (13, 14)))
+      val rdd3 = sc.parallelize(Seq((1, 6), (7, 8), (3, 10), (5, 12), (13, 14)))
         .partitionBy(new HashPartitioner(100))
-      val rdd4 = sc.parallelize(Array((1, 2), (2, 3), (2, 4), (3, 4)))
+      val rdd4 = sc.parallelize(Seq((1, 2), (2, 3), (2, 4), (3, 4)))
         .partitionBy(new HashPartitioner(9))
       val rdd5 = sc.parallelize((1 to 10).map(x => (x, x)), 11)
-      val rdd6 = sc.parallelize(Array((1, 2), (2, 3), (2, 4), (3, 4)))
+      val rdd6 = sc.parallelize(Seq((1, 2), (2, 3), (2, 4), (3, 4)))
         .partitionBy(new HashPartitioner(3))
 
       val partitioner1 = Partitioner.defaultPartitioner(rdd1, rdd2)

core/src/test/scala/org/apache/spark/ShuffleSuite.scala

@@ -44,7 +44,7 @@ abstract class ShuffleSuite extends SparkFunSuite with Matchers with LocalSparkC
   test("groupByKey without compression") {
     val myConf = conf.clone().set(config.SHUFFLE_COMPRESS, false)
     sc = new SparkContext("local", "test", myConf)
-    val pairs = sc.parallelize(Array((1, 1), (1, 2), (1, 3), (2, 1)), 4)
+    val pairs = sc.parallelize(Seq((1, 1), (1, 2), (1, 3), (2, 1)), 4)
     val groups = pairs.groupByKey(4).collect()
     assert(groups.size === 2)
     val valuesFor1 = groups.find(_._1 == 1).get._2

core/src/test/scala/org/apache/spark/rdd/PairRDDFunctionsSuite.scala

@@ -38,7 +38,7 @@ import org.apache.spark.util.Utils
 
 class PairRDDFunctionsSuite extends SparkFunSuite with SharedSparkContext {
   test("aggregateByKey") {
-    val pairs = sc.parallelize(Array((1, 1), (1, 1), (3, 2), (5, 1), (5, 3)), 2)
+    val pairs = sc.parallelize(Seq((1, 1), (1, 1), (3, 2), (5, 1), (5, 3)), 2)
 
     val sets = pairs.aggregateByKey(new HashSet[Int]())(_ += _, _ ++= _).collect()
     assert(sets.size === 3)
@@ -51,7 +51,7 @@ class PairRDDFunctionsSuite extends SparkFunSuite with SharedSparkContext {
   }
 
   test("groupByKey") {
-    val pairs = sc.parallelize(Array((1, 1), (1, 2), (1, 3), (2, 1)))
+    val pairs = sc.parallelize(Seq((1, 1), (1, 2), (1, 3), (2, 1)))
     val groups = pairs.groupByKey().collect()
     assert(groups.size === 2)
     val valuesFor1 = groups.find(_._1 == 1).get._2
@@ -61,7 +61,7 @@ class PairRDDFunctionsSuite extends SparkFunSuite with SharedSparkContext {
   }
 
   test("groupByKey with duplicates") {
-    val pairs = sc.parallelize(Array((1, 1), (1, 2), (1, 3), (1, 1), (2, 1)))
+    val pairs = sc.parallelize(Seq((1, 1), (1, 2), (1, 3), (1, 1), (2, 1)))
     val groups = pairs.groupByKey().collect()
     assert(groups.size === 2)
     val valuesFor1 = groups.find(_._1 == 1).get._2
@@ -71,7 +71,7 @@ class PairRDDFunctionsSuite extends SparkFunSuite with SharedSparkContext {
   }
 
   test("groupByKey with negative key hash codes") {
-    val pairs = sc.parallelize(Array((-1, 1), (-1, 2), (-1, 3), (2, 1)))
+    val pairs = sc.parallelize(Seq((-1, 1), (-1, 2), (-1, 3), (2, 1)))
     val groups = pairs.groupByKey().collect()
     assert(groups.size === 2)
     val valuesForMinus1 = groups.find(_._1 == -1).get._2
@@ -81,7 +81,7 @@ class PairRDDFunctionsSuite extends SparkFunSuite with SharedSparkContext {
   }
 
   test("groupByKey with many output partitions") {
-    val pairs = sc.parallelize(Array((1, 1), (1, 2), (1, 3), (2, 1)))
+    val pairs = sc.parallelize(Seq((1, 1), (1, 2), (1, 3), (2, 1)))
     val groups = pairs.groupByKey(10).collect()
     assert(groups.size === 2)
     val valuesFor1 = groups.find(_._1 == 1).get._2
@@ -170,13 +170,13 @@ class PairRDDFunctionsSuite extends SparkFunSuite with SharedSparkContext {
   }
 
   test("reduceByKey") {
-    val pairs = sc.parallelize(Array((1, 1), (1, 2), (1, 3), (1, 1), (2, 1)))
+    val pairs = sc.parallelize(Seq((1, 1), (1, 2), (1, 3), (1, 1), (2, 1)))
     val sums = pairs.reduceByKey(_ + _).collect()
     assert(sums.toSet === Set((1, 7), (2, 1)))
   }
 
   test("reduceByKey with collectAsMap") {
-    val pairs = sc.parallelize(Array((1, 1), (1, 2), (1, 3), (1, 1), (2, 1)))
+    val pairs = sc.parallelize(Seq((1, 1), (1, 2), (1, 3), (1, 1), (2, 1)))
     val sums = pairs.reduceByKey(_ + _).collectAsMap()
     assert(sums.size === 2)
     assert(sums(1) === 7)
@@ -184,7 +184,7 @@ class PairRDDFunctionsSuite extends SparkFunSuite with SharedSparkContext {
   }
 
   test("reduceByKey with many output partitions") {
-    val pairs = sc.parallelize(Array((1, 1), (1, 2), (1, 3), (1, 1), (2, 1)))
+    val pairs = sc.parallelize(Seq((1, 1), (1, 2), (1, 3), (1, 1), (2, 1)))
     val sums = pairs.reduceByKey(_ + _, 10).collect()
     assert(sums.toSet === Set((1, 7), (2, 1)))
   }
@@ -194,7 +194,7 @@ class PairRDDFunctionsSuite extends SparkFunSuite with SharedSparkContext {
       def numPartitions = 2
       def getPartition(key: Any) = key.asInstanceOf[Int]
     }
-    val pairs = sc.parallelize(Array((1, 1), (1, 2), (1, 1), (0, 1))).partitionBy(p)
+    val pairs = sc.parallelize(Seq((1, 1), (1, 2), (1, 1), (0, 1))).partitionBy(p)
     val sums = pairs.reduceByKey(_ + _)
     assert(sums.collect().toSet === Set((1, 4), (0, 1)))
     assert(sums.partitioner === Some(p))
@@ -246,8 +246,8 @@ class PairRDDFunctionsSuite extends SparkFunSuite with SharedSparkContext {
   }
 
   test("join") {
-    val rdd1 = sc.parallelize(Array((1, 1), (1, 2), (2, 1), (3, 1)))
-    val rdd2 = sc.parallelize(Array((1, 'x'), (2, 'y'), (2, 'z'), (4, 'w')))
+    val rdd1 = sc.parallelize(Seq((1, 1), (1, 2), (2, 1), (3, 1)))
+    val rdd2 = sc.parallelize(Seq((1, 'x'), (2, 'y'), (2, 'z'), (4, 'w')))
     val joined = rdd1.join(rdd2).collect()
     assert(joined.size === 4)
     assert(joined.toSet === Set(
@@ -259,8 +259,8 @@ class PairRDDFunctionsSuite extends SparkFunSuite with SharedSparkContext {
   }
 
   test("join all-to-all") {
-    val rdd1 = sc.parallelize(Array((1, 1), (1, 2), (1, 3)))
-    val rdd2 = sc.parallelize(Array((1, 'x'), (1, 'y')))
+    val rdd1 = sc.parallelize(Seq((1, 1), (1, 2), (1, 3)))
+    val rdd2 = sc.parallelize(Seq((1, 'x'), (1, 'y')))
     val joined = rdd1.join(rdd2).collect()
     assert(joined.size === 6)
     assert(joined.toSet === Set(
@@ -274,8 +274,8 @@ class PairRDDFunctionsSuite extends SparkFunSuite with SharedSparkContext {
   }
 
   test("leftOuterJoin") {
-    val rdd1 = sc.parallelize(Array((1, 1), (1, 2), (2, 1), (3, 1)))
-    val rdd2 = sc.parallelize(Array((1, 'x'), (2, 'y'), (2, 'z'), (4, 'w')))
+    val rdd1 = sc.parallelize(Seq((1, 1), (1, 2), (2, 1), (3, 1)))
+    val rdd2 = sc.parallelize(Seq((1, 'x'), (2, 'y'), (2, 'z'), (4, 'w')))
     val joined = rdd1.leftOuterJoin(rdd2).collect()
     assert(joined.size === 5)
     assert(joined.toSet === Set(
@@ -292,7 +292,7 @@ class PairRDDFunctionsSuite extends SparkFunSuite with SharedSparkContext {
     import scala.reflect.classTag
     val intPairCT = classTag[(Int, Int)]
 
-    val rdd1 = sc.parallelize(Array((1, 1), (1, 2), (2, 1), (3, 1)))
+    val rdd1 = sc.parallelize(Seq((1, 1), (1, 2), (2, 1), (3, 1)))
     val rdd2 = sc.emptyRDD[(Int, Int)](intPairCT)
 
     val joined = rdd1.cogroup(rdd2).collect()
@@ -304,7 +304,7 @@ class PairRDDFunctionsSuite extends SparkFunSuite with SharedSparkContext {
     import scala.reflect.classTag
     val intCT = classTag[Int]
 
-    val rdd1 = sc.parallelize(Array((1, 1), (1, 2), (2, 1), (3, 1)))
+    val rdd1 = sc.parallelize(Seq((1, 1), (1, 2), (2, 1), (3, 1)))
     val rdd2 = sc.emptyRDD[Int](intCT).groupBy((x) => 5)
     val joined = rdd1.cogroup(rdd2).collect()
     assert(joined.size > 0)
@@ -315,7 +315,7 @@ class PairRDDFunctionsSuite extends SparkFunSuite with SharedSparkContext {
     "with an order of magnitude difference in number of partitions") {
     val rdd1 = sc.parallelize((1 to 1000).map(x => (x, x)), 1000)
     val rdd2 = sc
-      .parallelize(Array((1, 1), (1, 2), (2, 1), (3, 1)))
+      .parallelize(Seq((1, 1), (1, 2), (2, 1), (3, 1)))
       .partitionBy(new HashPartitioner(10))
     val joined = rdd1.cogroup(rdd2)
     assert(joined.getNumPartitions == rdd1.getNumPartitions)
@@ -325,7 +325,7 @@ class PairRDDFunctionsSuite extends SparkFunSuite with SharedSparkContext {
   test("cogroup between multiple RDD with number of partitions similar in order of magnitude") {
     val rdd1 = sc.parallelize((1 to 1000).map(x => (x, x)), 20)
     val rdd2 = sc
-      .parallelize(Array((1, 1), (1, 2), (2, 1), (3, 1)))
+      .parallelize(Seq((1, 1), (1, 2), (2, 1), (3, 1)))
       .partitionBy(new HashPartitioner(10))
     val joined = rdd1.cogroup(rdd2)
     assert(joined.getNumPartitions == rdd2.getNumPartitions)
@@ -336,7 +336,7 @@ class PairRDDFunctionsSuite extends SparkFunSuite with SharedSparkContext {
     try {
       sc.conf.set("spark.default.parallelism", "4")
       val rdd1 = sc.parallelize((1 to 1000).map(x => (x, x)), 20)
-      val rdd2 = sc.parallelize(Array((1, 1), (1, 2), (2, 1), (3, 1)), 10)
+      val rdd2 = sc.parallelize(Seq((1, 1), (1, 2), (2, 1), (3, 1)), 10)
       val joined = rdd1.cogroup(rdd2)
       assert(joined.getNumPartitions == sc.defaultParallelism)
     } finally {
@@ -349,7 +349,7 @@ class PairRDDFunctionsSuite extends SparkFunSuite with SharedSparkContext {
     try {
       sc.conf.set("spark.default.parallelism", "4")
       val rdd1 = sc.parallelize((1 to 1000).map(x => (x, x)), 20)
-      val rdd2 = sc.parallelize(Array((1, 1), (1, 2), (2, 1), (3, 1)))
+      val rdd2 = sc.parallelize(Seq((1, 1), (1, 2), (2, 1), (3, 1)))
         .partitionBy(new HashPartitioner(10))
       val joined = rdd1.cogroup(rdd2)
       assert(joined.getNumPartitions == rdd2.getNumPartitions)
@@ -364,7 +364,7 @@ class PairRDDFunctionsSuite extends SparkFunSuite with SharedSparkContext {
     try {
       sc.conf.set("spark.default.parallelism", "4")
       val rdd1 = sc.parallelize((1 to 1000).map(x => (x, x)), 1000)
-      val rdd2 = sc.parallelize(Array((1, 1), (1, 2), (2, 1), (3, 1)))
+      val rdd2 = sc.parallelize(Seq((1, 1), (1, 2), (2, 1), (3, 1)))
         .partitionBy(new HashPartitioner(10))
       val joined = rdd1.cogroup(rdd2)
       assert(joined.getNumPartitions == rdd2.getNumPartitions)
@@ -374,8 +374,8 @@ class PairRDDFunctionsSuite extends SparkFunSuite with SharedSparkContext {
   }
 
   test("rightOuterJoin") {
-    val rdd1 = sc.parallelize(Array((1, 1), (1, 2), (2, 1), (3, 1)))
-    val rdd2 = sc.parallelize(Array((1, 'x'), (2, 'y'), (2, 'z'), (4, 'w')))
+    val rdd1 = sc.parallelize(Seq((1, 1), (1, 2), (2, 1), (3, 1)))
+    val rdd2 = sc.parallelize(Seq((1, 'x'), (2, 'y'), (2, 'z'), (4, 'w')))
     val joined = rdd1.rightOuterJoin(rdd2).collect()
     assert(joined.size === 5)
     assert(joined.toSet === Set(
@@ -388,8 +388,8 @@ class PairRDDFunctionsSuite extends SparkFunSuite with SharedSparkContext {
   }
 
   test("fullOuterJoin") {
-    val rdd1 = sc.parallelize(Array((1, 1), (1, 2), (2, 1), (3, 1)))
-    val rdd2 = sc.parallelize(Array((1, 'x'), (2, 'y'), (2, 'z'), (4, 'w')))
+    val rdd1 = sc.parallelize(Seq((1, 1), (1, 2), (2, 1), (3, 1)))
+    val rdd2 = sc.parallelize(Seq((1, 'x'), (2, 'y'), (2, 'z'), (4, 'w')))
     val joined = rdd1.fullOuterJoin(rdd2).collect()
     assert(joined.size === 6)
     assert(joined.toSet === Set(
@@ -403,15 +403,15 @@ class PairRDDFunctionsSuite extends SparkFunSuite with SharedSparkContext {
   }
 
   test("join with no matches") {
-    val rdd1 = sc.parallelize(Array((1, 1), (1, 2), (2, 1), (3, 1)))
-    val rdd2 = sc.parallelize(Array((4, 'x'), (5, 'y'), (5, 'z'), (6, 'w')))
+    val rdd1 = sc.parallelize(Seq((1, 1), (1, 2), (2, 1), (3, 1)))
+    val rdd2 = sc.parallelize(Seq((4, 'x'), (5, 'y'), (5, 'z'), (6, 'w')))
     val joined = rdd1.join(rdd2).collect()
     assert(joined.size === 0)
   }
 
   test("join with many output partitions") {
-    val rdd1 = sc.parallelize(Array((1, 1), (1, 2), (2, 1), (3, 1)))
-    val rdd2 = sc.parallelize(Array((1, 'x'), (2, 'y'), (2, 'z'), (4, 'w')))
+    val rdd1 = sc.parallelize(Seq((1, 1), (1, 2), (2, 1), (3, 1)))
+    val rdd2 = sc.parallelize(Seq((1, 'x'), (2, 'y'), (2, 'z'), (4, 'w')))
     val joined = rdd1.join(rdd2, 10).collect()
     assert(joined.size === 4)
     assert(joined.toSet === Set(
@@ -423,8 +423,8 @@ class PairRDDFunctionsSuite extends SparkFunSuite with SharedSparkContext {
   }
 
   test("groupWith") {
-    val rdd1 = sc.parallelize(Array((1, 1), (1, 2), (2, 1), (3, 1)))
-    val rdd2 = sc.parallelize(Array((1, 'x'), (2, 'y'), (2, 'z'), (4, 'w')))
+    val rdd1 = sc.parallelize(Seq((1, 1), (1, 2), (2, 1), (3, 1)))
+    val rdd2 = sc.parallelize(Seq((1, 'x'), (2, 'y'), (2, 'z'), (4, 'w')))
     val joined = rdd1.groupWith(rdd2).collect()
     assert(joined.size === 4)
     val joinedSet = joined.map(x => (x._1, (x._2._1.toList, x._2._2.toList))).toSet
@@ -437,9 +437,9 @@ class PairRDDFunctionsSuite extends SparkFunSuite with SharedSparkContext {
   }
 
   test("groupWith3") {
-    val rdd1 = sc.parallelize(Array((1, 1), (1, 2), (2, 1), (3, 1)))
-    val rdd2 = sc.parallelize(Array((1, 'x'), (2, 'y'), (2, 'z'), (4, 'w')))
-    val rdd3 = sc.parallelize(Array((1, 'a'), (3, 'b'), (4, 'c'), (4, 'd')))
+    val rdd1 = sc.parallelize(Seq((1, 1), (1, 2), (2, 1), (3, 1)))
+    val rdd2 = sc.parallelize(Seq((1, 'x'), (2, 'y'), (2, 'z'), (4, 'w')))
+    val rdd3 = sc.parallelize(Seq((1, 'a'), (3, 'b'), (4, 'c'), (4, 'd')))
     val joined = rdd1.groupWith(rdd2, rdd3).collect()
     assert(joined.size === 4)
     val joinedSet = joined.map(x => (x._1,
@@ -453,10 +453,10 @@ class PairRDDFunctionsSuite extends SparkFunSuite with SharedSparkContext {
   }
 
   test("groupWith4") {
-    val rdd1 = sc.parallelize(Array((1, 1), (1, 2), (2, 1), (3, 1)))
-    val rdd2 = sc.parallelize(Array((1, 'x'), (2, 'y'), (2, 'z'), (4, 'w')))
-    val rdd3 = sc.parallelize(Array((1, 'a'), (3, 'b'), (4, 'c'), (4, 'd')))
-    val rdd4 = sc.parallelize(Array((2, '@')))
+    val rdd1 = sc.parallelize(Seq((1, 1), (1, 2), (2, 1), (3, 1)))
+    val rdd2 = sc.parallelize(Seq((1, 'x'), (2, 'y'), (2, 'z'), (4, 'w')))
+    val rdd3 = sc.parallelize(Seq((1, 'a'), (3, 'b'), (4, 'c'), (4, 'd')))
+    val rdd4 = sc.parallelize(Seq((2, '@')))
     val joined = rdd1.groupWith(rdd2, rdd3, rdd4).collect()
     assert(joined.size === 4)
     val joinedSet = joined.map(x => (x._1,
@@ -480,7 +480,7 @@ class PairRDDFunctionsSuite extends SparkFunSuite with SharedSparkContext {
   }
 
   test("keys and values") {
-    val rdd = sc.parallelize(Array((1, "a"), (2, "b")))
+    val rdd = sc.parallelize(Seq((1, "a"), (2, "b")))
     assert(rdd.keys.collect().toList === List(1, 2))
     assert(rdd.values.collect().toList === List("a", "b"))
   }
@@ -517,9 +517,9 @@ class PairRDDFunctionsSuite extends SparkFunSuite with SharedSparkContext {
       def getPartition(key: Any) = key.asInstanceOf[Int]
     }
     // partitionBy so we have a narrow dependency
-    val a = sc.parallelize(Array((1, "a"), (2, "b"), (3, "c"))).partitionBy(p)
+    val a = sc.parallelize(Seq((1, "a"), (2, "b"), (3, "c"))).partitionBy(p)
     // more partitions/no partitioner so a shuffle dependency
-    val b = sc.parallelize(Array((2, "b"), (3, "cc"), (4, "d")), 4)
+    val b = sc.parallelize(Seq((2, "b"), (3, "cc"), (4, "d")), 4)
     val c = a.subtract(b)
     assert(c.collect().toSet === Set((1, "a"), (3, "c")))
     // Ideally we could keep the original partitioner...
@@ -527,8 +527,8 @@ class PairRDDFunctionsSuite extends SparkFunSuite with SharedSparkContext {
   }
 
   test("subtractByKey") {
-    val a = sc.parallelize(Array((1, "a"), (1, "a"), (2, "b"), (3, "c")), 2)
-    val b = sc.parallelize(Array((2, 20), (3, 30), (4, 40)), 4)
+    val a = sc.parallelize(Seq((1, "a"), (1, "a"), (2, "b"), (3, "c")), 2)
+    val b = sc.parallelize(Seq((2, 20), (3, 30), (4, 40)), 4)
     val c = a.subtractByKey(b)
     assert(c.collect().toSet === Set((1, "a"), (1, "a")))
     assert(c.partitions.size === a.partitions.size)
@@ -541,22 +541,22 @@ class PairRDDFunctionsSuite extends SparkFunSuite with SharedSparkContext {
       def getPartition(key: Any) = key.asInstanceOf[Int]
     }
     // partitionBy so we have a narrow dependency
-    val a = sc.parallelize(Array((1, "a"), (1, "a"), (2, "b"), (3, "c"))).partitionBy(p)
+    val a = sc.parallelize(Seq((1, "a"), (1, "a"), (2, "b"), (3, "c"))).partitionBy(p)
     // more partitions/no partitioner so a shuffle dependency
-    val b = sc.parallelize(Array((2, "b"), (3, "cc"), (4, "d")), 4)
+    val b = sc.parallelize(Seq((2, "b"), (3, "cc"), (4, "d")), 4)
     val c = a.subtractByKey(b)
     assert(c.collect().toSet === Set((1, "a"), (1, "a")))
     assert(c.partitioner.get === p)
   }
 
   test("foldByKey") {
-    val pairs = sc.parallelize(Array((1, 1), (1, 2), (1, 3), (1, 1), (2, 1)))
+    val pairs = sc.parallelize(Seq((1, 1), (1, 2), (1, 3), (1, 1), (2, 1)))
     val sums = pairs.foldByKey(0)(_ + _).collect()
     assert(sums.toSet === Set((1, 7), (2, 1)))
   }
 
   test("foldByKey with mutable result type") {
-    val pairs = sc.parallelize(Array((1, 1), (1, 2), (1, 3), (1, 1), (2, 1)))
+    val pairs = sc.parallelize(Seq((1, 1), (1, 2), (1, 3), (1, 1), (2, 1)))
     val bufs = pairs.mapValues(v => ArrayBuffer(v)).cache()
     // Fold the values using in-place mutation
     val sums = bufs.foldByKey(new ArrayBuffer[Int])(_ ++= _).collect()
@@ -571,7 +571,7 @@ class PairRDDFunctionsSuite extends SparkFunSuite with SharedSparkContext {
   }
 
   test("saveNewAPIHadoopFile should call setConf if format is configurable") {
-    val pairs = sc.parallelize(Array((Integer.valueOf(1), Integer.valueOf(1))))
+    val pairs = sc.parallelize(Seq((Integer.valueOf(1), Integer.valueOf(1))))
 
     // No error, non-configurable formats still work
     pairs.saveAsNewAPIHadoopFile[NewFakeFormat]("ignored")
@@ -587,7 +587,7 @@ class PairRDDFunctionsSuite extends SparkFunSuite with SharedSparkContext {
 
   test("The JobId on the driver and executors should be the same during the commit") {
     // Create more than one rdd to mimic stageId not equal to rddId
-    val pairs = sc.parallelize(Array((1, 2), (2, 3)), 2)
+    val pairs = sc.parallelize(Seq((1, 2), (2, 3)), 2)
       .map { p => (Integer.valueOf(p._1 + 1), Integer.valueOf(p._2 + 1)) }
       .filter { p => p._1 > 0 }
     pairs.saveAsNewAPIHadoopFile[YetAnotherFakeFormat]("ignored")
@@ -595,7 +595,7 @@ class PairRDDFunctionsSuite extends SparkFunSuite with SharedSparkContext {
   }
 
   test("saveAsHadoopFile should respect configured output committers") {
-    val pairs = sc.parallelize(Array((Integer.valueOf(1), Integer.valueOf(1))))
+    val pairs = sc.parallelize(Seq((Integer.valueOf(1), Integer.valueOf(1))))
     val conf = new JobConf()
     conf.setOutputCommitter(classOf[FakeOutputCommitter])
 
@@ -607,7 +607,7 @@ class PairRDDFunctionsSuite extends SparkFunSuite with SharedSparkContext {
   }
 
   test("failure callbacks should be called before calling writer.close() in saveNewAPIHadoopFile") {
-    val pairs = sc.parallelize(Array((Integer.valueOf(1), Integer.valueOf(2))), 1)
+    val pairs = sc.parallelize(Seq((Integer.valueOf(1), Integer.valueOf(2))), 1)
 
     FakeWriterWithCallback.calledBy = ""
     FakeWriterWithCallback.exception = null
@@ -622,7 +622,7 @@ class PairRDDFunctionsSuite extends SparkFunSuite with SharedSparkContext {
   }
 
   test("failure callbacks should be called before calling writer.close() in saveAsHadoopFile") {
-    val pairs = sc.parallelize(Array((Integer.valueOf(1), Integer.valueOf(2))), 1)
+    val pairs = sc.parallelize(Seq((Integer.valueOf(1), Integer.valueOf(2))), 1)
     val conf = new JobConf()
 
     FakeWriterWithCallback.calledBy = ""
@@ -640,7 +640,7 @@ class PairRDDFunctionsSuite extends SparkFunSuite with SharedSparkContext {
 
   test("saveAsNewAPIHadoopDataset should support invalid output paths when " +
     "there are no files to be committed to an absolute output location") {
-    val pairs = sc.parallelize(Array((Integer.valueOf(1), Integer.valueOf(2))), 1)
+    val pairs = sc.parallelize(Seq((Integer.valueOf(1), Integer.valueOf(2))), 1)
 
     def saveRddWithPath(path: String): Unit = {
       val job = NewJob.getInstance(new Configuration(sc.hadoopConfiguration))
@@ -668,7 +668,7 @@ class PairRDDFunctionsSuite extends SparkFunSuite with SharedSparkContext {
   // for non-null invalid paths.
   test("saveAsHadoopDataset should respect empty output directory when " +
     "there are no files to be committed to an absolute output location") {
-    val pairs = sc.parallelize(Array((Integer.valueOf(1), Integer.valueOf(2))), 1)
+    val pairs = sc.parallelize(Seq((Integer.valueOf(1), Integer.valueOf(2))), 1)
 
     val conf = new JobConf()
     conf.setOutputKeyClass(classOf[Integer])
@@ -683,7 +683,7 @@ class PairRDDFunctionsSuite extends SparkFunSuite with SharedSparkContext {
   }
 
   test("lookup") {
-    val pairs = sc.parallelize(Array((1, 2), (3, 4), (5, 6), (5, 7)))
+    val pairs = sc.parallelize(Seq((1, 2), (3, 4), (5, 6), (5, 7)))
 
     assert(pairs.partitioner === None)
     assert(pairs.lookup(1) === Seq(2))
@@ -693,7 +693,7 @@ class PairRDDFunctionsSuite extends SparkFunSuite with SharedSparkContext {
   }
 
   test("lookup with partitioner") {
-    val pairs = sc.parallelize(Array((1, 2), (3, 4), (5, 6), (5, 7)))
+    val pairs = sc.parallelize(Seq((1, 2), (3, 4), (5, 6), (5, 7)))
 
     val p = new Partitioner {
       def numPartitions: Int = 2
@@ -709,7 +709,7 @@ class PairRDDFunctionsSuite extends SparkFunSuite with SharedSparkContext {
   }
 
   test("lookup with bad partitioner") {
-    val pairs = sc.parallelize(Array((1, 2), (3, 4), (5, 6), (5, 7)))
+    val pairs = sc.parallelize(Seq((1, 2), (3, 4), (5, 6), (5, 7)))
 
     val p = new Partitioner {
       def numPartitions: Int = 2

core/src/test/scala/org/apache/spark/rdd/SortingSuite.scala

@@ -25,7 +25,7 @@ import org.apache.spark.internal.Logging
 class SortingSuite extends SparkFunSuite with SharedSparkContext with Matchers with Logging {
 
   test("sortByKey") {
-    val pairs = sc.parallelize(Array((1, 0), (2, 0), (0, 0), (3, 0)), 2)
+    val pairs = sc.parallelize(Seq((1, 0), (2, 0), (0, 0), (3, 0)), 2)
     assert(pairs.sortByKey().collect() === Array((0, 0), (1, 0), (2, 0), (3, 0)))
   }
 

docs/graphx-programming-guide.md

@@ -183,7 +183,7 @@ code constructs a graph from a collection of RDDs:
 val sc: SparkContext
 // Create an RDD for the vertices
 val users: RDD[(VertexId, (String, String))] =
-  sc.parallelize(Array((3L, ("rxin", "student")), (7L, ("jgonzal", "postdoc")),
+  sc.parallelize(Seq((3L, ("rxin", "student")), (7L, ("jgonzal", "postdoc")),
                        (5L, ("franklin", "prof")), (2L, ("istoica", "prof"))))
 // Create an RDD for edges
 val relationships: RDD[Edge[String]] =
@@ -420,7 +420,7 @@ interest or eliminate broken links. For example in the following code we remove
 {% highlight scala %}
 // Create an RDD for the vertices
 val users: RDD[(VertexId, (String, String))] =
-  sc.parallelize(Array((3L, ("rxin", "student")), (7L, ("jgonzal", "postdoc")),
+  sc.parallelize(Seq((3L, ("rxin", "student")), (7L, ("jgonzal", "postdoc")),
                        (5L, ("franklin", "prof")), (2L, ("istoica", "prof")),
                        (4L, ("peter", "student"))))
 // Create an RDD for edges

graphx/src/test/scala/org/apache/spark/graphx/GraphSuite.scala

@@ -218,7 +218,7 @@ class GraphSuite extends SparkFunSuite with LocalSparkContext {
 
   test("reverse with join elimination") {
     withSpark { sc =>
-      val vertices: RDD[(VertexId, Int)] = sc.parallelize(Array((1L, 1), (2L, 2)))
+      val vertices: RDD[(VertexId, Int)] = sc.parallelize(Seq((1L, 1), (2L, 2)))
       val edges: RDD[Edge[Int]] = sc.parallelize(Array(Edge(1L, 2L, 0)))
       val graph = Graph(vertices, edges).reverse
       val result = GraphXUtils.mapReduceTriplets[Int, Int, Int](

graphx/src/test/scala/org/apache/spark/graphx/lib/ConnectedComponentsSuite.scala

@@ -101,7 +101,7 @@ class ConnectedComponentsSuite extends SparkFunSuite with LocalSparkContext {
     withSpark { sc =>
       // Create an RDD for the vertices
       val users: RDD[(VertexId, (String, String))] =
-        sc.parallelize(Array((3L, ("rxin", "student")), (7L, ("jgonzal", "postdoc")),
+        sc.parallelize(Seq((3L, ("rxin", "student")), (7L, ("jgonzal", "postdoc")),
                        (5L, ("franklin", "prof")), (2L, ("istoica", "prof")),
                        (4L, ("peter", "student"))))
       // Create an RDD for edges

mllib/src/test/scala/org/apache/spark/mllib/rdd/MLPairRDDFunctionsSuite.scala

@@ -23,7 +23,7 @@ import org.apache.spark.mllib.util.MLlibTestSparkContext
 
 class MLPairRDDFunctionsSuite extends SparkFunSuite with MLlibTestSparkContext {
   test("topByKey") {
-    val topMap = sc.parallelize(Array((1, 7), (1, 3), (1, 6), (1, 1), (1, 2), (3, 2), (3, 7), (5,
+    val topMap = sc.parallelize(Seq((1, 7), (1, 3), (1, 6), (1, 1), (1, 2), (3, 2), (3, 7), (5,
       1), (3, 5)), 2)
       .topByKey(5)
       .collectAsMap()

sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala

@@ -554,7 +554,7 @@ class DataFrameSuite extends QueryTest with SharedSparkSession {
   }
 
   test("replace column using withColumns") {
-    val df2 = sparkContext.parallelize(Array((1, 2), (2, 3), (3, 4))).toDF("x", "y")
+    val df2 = sparkContext.parallelize(Seq((1, 2), (2, 3), (3, 4))).toDF("x", "y")
     val df3 = df2.withColumns(Seq("x", "newCol1", "newCol2"),
       Seq(df2("x") + 1, df2("y"), df2("y") + 1))
     checkAnswer(