liupc commented on issue #27002: [SPARK-30346][CORE]Improve logging when events dropped URL: https://github.com/apache/spark/pull/27002#issuecomment-571405141 @HeartSaVioR I agree that this log can not definitely tell us where the slow must be, but at least can provide some clues, it's no worse than no clues. Moreover, I think if there are some hot points are really slow, then there are larger probability that it will appear in the periodic log.
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