Github user jerryshao commented on a diff in the pull request: https://github.com/apache/spark/pull/17401#discussion_r109914191 --- Diff: common/network-shuffle/src/main/java/org/apache/spark/network/shuffle/ExternalShuffleBlockHandler.java --- @@ -176,7 +176,8 @@ private void checkAuth(TransportClient client, String appId) { /** * A simple class to wrap all shuffle service wrapper metrics */ - private class ShuffleMetrics implements MetricSet { + @VisibleForTesting --- End diff -- `@VisibleForTesting` causes classpath issues. Please note this in the java doc instead (SPARK-11615). This is a scalastyle output, would be better to remove this annotation.
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