Github user andrewor14 commented on a diff in the pull request: https://github.com/apache/spark/pull/2432#discussion_r18313262 --- Diff: core/src/main/scala/org/apache/spark/metrics/MetricsSystem.scala --- @@ -98,10 +96,23 @@ private[spark] class MetricsSystem private ( sinks.foreach(_.report()) } + def buildRegistryName(source: Source) = { --- End diff -- Add return type here. Can you also add a quick java doc?
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