Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/9571#discussion_r111830465
--- Diff:
core/src/main/scala/org/apache/spark/deploy/history/ApplicationCache.scala ---
@@ -410,34 +409,25 @@ private[history] class CacheMetrics(prefix: String)
extends Source {
("update.triggered.count", updateTriggeredCount))
/** all metrics, including timers */
- private val allMetrics = counters ++ Seq(
+ private val allMetrics: Seq[(String, Metric with Counting)] = counters
++ Seq(
--- End diff --
Is declaring the type useful here in some way?
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