Github user jerryshao commented on a diff in the pull request:
https://github.com/apache/spark/pull/17617#discussion_r119517540
--- Diff:
core/src/test/scala/org/apache/spark/metrics/InputOutputMetricsSuite.scala ---
@@ -319,6 +319,37 @@ class InputOutputMetricsSuite extends SparkFunSuite
with SharedSparkContext
}
assert(bytesRead >= tmpFile.length())
}
+
+ test("input metrics with old Hadoop API in different thread") {
+ val bytesRead = runAndReturnBytesRead {
+ sc.textFile(tmpFilePath, 4).mapPartitions { iter =>
+ val buf = new ArrayBuffer[String]()
+ ThreadUtils.runInNewThread("testThread", false) {
+ iter.flatMap(_.split(" ")).foreach(buf.append(_))
+ }
+
+ buf.iterator
+ }.count()
+ }
+ assert(bytesRead != 0)
--- End diff --
Done.
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