Github user jerryshao commented on a diff in the pull request:
https://github.com/apache/spark/pull/19464#discussion_r144472362
--- Diff: core/src/test/scala/org/apache/spark/FileSuite.scala ---
@@ -510,4 +510,86 @@ class FileSuite extends SparkFunSuite with
LocalSparkContext {
}
}
+ test("spark.files.ignoreEmptySplits work correctly (old Hadoop API)") {
+ val conf = new SparkConf()
+ conf.setAppName("test").setMaster("local").set(IGNORE_EMPTY_SPLITS,
true)
+ sc = new SparkContext(conf)
+
+ def testIgnoreEmptySplits(data: Array[Tuple2[String, String]],
numSlices: Int,
+ outputSuffix: Int, checkPart: String, expectedPartitionNum: Int):
Unit = {
+ val dataRDD = sc.parallelize(data, numSlices)
+ val output = new File(tempDir, "output" + outputSuffix)
+ dataRDD.saveAsHadoopFile[TextOutputFormat[String,
String]](output.getPath)
+ assert(new File(output, checkPart).exists() === true)
+ val hadoopRDD = sc.textFile(new File(output, "part-*").getPath)
+ assert(hadoopRDD.partitions.length === expectedPartitionNum)
+ }
+
+ // Ensure that if all of the splits are empty, we remove the splits
correctly
+ testIgnoreEmptySplits(
+ data = Array.empty[Tuple2[String, String]],
+ numSlices = 1,
+ outputSuffix = 0,
+ checkPart = "part-00000",
+ expectedPartitionNum = 0)
+
+ // Ensure that if no split is empty, we don't lose any splits
+ testIgnoreEmptySplits(
+ data = Array(("key1", "a"), ("key2", "a"), ("key3", "b")),
+ numSlices = 2,
+ outputSuffix = 1,
+ checkPart = "part-00001",
+ expectedPartitionNum = 2)
+
+ // Ensure that if part of the splits are empty, we remove the splits
correctly
+ testIgnoreEmptySplits(
+ data = Array(("key1", "a"), ("key2", "a")),
+ numSlices = 5,
+ outputSuffix = 2,
+ checkPart = "part-00004",
+ expectedPartitionNum = 2)
+ }
+
+ test("spark.files.ignoreEmptySplits work correctly (new Hadoop API)") {
+ val conf = new SparkConf()
+ conf.setAppName("test").setMaster("local").set(IGNORE_EMPTY_SPLITS,
true)
+ sc = new SparkContext(conf)
+
+ def testIgnoreEmptySplits(data: Array[Tuple2[String, String]],
numSlices: Int,
--- End diff --
ditto.
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