Github user pwendell commented on a diff in the pull request:
https://github.com/apache/spark/pull/2087#discussion_r19419188
--- Diff: core/src/main/scala/org/apache/spark/rdd/HadoopRDD.scala ---
@@ -224,18 +223,18 @@ class HadoopRDD[K, V](
val key: K = reader.createKey()
val value: V = reader.createValue()
- // Set the task input metrics.
val inputMetrics = new InputMetrics(DataReadMethod.Hadoop)
- try {
- /* bytesRead may not exactly equal the bytes read by a task: split
boundaries aren't
- * always at record boundaries, so tasks may need to read into
other splits to complete
- * a record. */
- inputMetrics.bytesRead = split.inputSplit.value.getLength()
- } catch {
- case e: java.io.IOException =>
- logWarning("Unable to get input size to set InputMetrics for
task", e)
+ // Find a function that will return the FileSystem bytes read by
this thread.
+ val bytesReadCallback = if
(split.inputSplit.value.isInstanceOf[FileSplit]) {
+ SparkHadoopUtil.get.getFSBytesReadOnThreadCallback(
+ split.inputSplit.value.asInstanceOf[FileSplit].getPath, jobConf)
+ } else {
+ None
+ }
+ if (bytesReadCallback.isDefined) {
+ context.taskMetrics.inputMetrics = Some(inputMetrics)
}
- context.taskMetrics.inputMetrics = Some(inputMetrics)
--- End diff --
Gotcha - maybe we can add a comment about this later.
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