Github user squito commented on a diff in the pull request:
https://github.com/apache/spark/pull/6263#discussion_r44064388
--- Diff:
core/src/main/scala/org/apache/spark/storage/StorageStatusListener.scala ---
@@ -17,26 +17,55 @@
package org.apache.spark.storage
+import java.util.concurrent.TimeUnit
+
+import scala.collection.JavaConversions.collectionAsScalaIterable
import scala.collection.mutable
+import scala.language.reflectiveCalls
--- End diff --
ok, so that is in the StorageStatusListener*Suite*, not
StorageStatusListener. You're getting that b/c you're calling
`ticker.advance`, though you haven't explicitly defined a class or interface w/
that method, so scala is using some reflection tricks to do it. If you change
that test as I suggested, that warning will disappear and you can remove the
import
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