Github user yhuai commented on a diff in the pull request: https://github.com/apache/spark/pull/10061#discussion_r63808009 --- Diff: core/src/main/scala/org/apache/spark/util/JsonProtocol.scala --- @@ -96,6 +100,7 @@ private[spark] object JsonProtocol { executorMetricsUpdateToJson(metricsUpdate) case blockUpdated: SparkListenerBlockUpdated => throw new MatchError(blockUpdated) // TODO(ekl) implement this + case _ => parse(mapper.writeValueAsString(event)) --- End diff -- It is very possible that we silently pull in unnecessary information. If we have new event types, we should handle those explicitly instead of relying on this line. I am proposing to revert this line.
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