Github user srowen commented on a diff in the pull request: https://github.com/apache/spark/pull/22473#discussion_r219717779 --- Diff: core/src/main/scala/org/apache/spark/internal/config/package.scala --- @@ -83,6 +83,17 @@ package object config { private[spark] val EXECUTOR_CLASS_PATH = ConfigBuilder(SparkLauncher.EXECUTOR_EXTRA_CLASSPATH).stringConf.createOptional + private[spark] val EXECUTOR_HEARTBEAT_DROP_ZERO_METRICS = + ConfigBuilder("spark.executor.heartbeat.dropZeroMetrics").booleanConf.createWithDefault(true) --- End diff -- Question -- when would you not want this to be true? It's already changing behavior here, but what's the case where you need a safety valve to go back? it's just not broadcasting changes that can't matter because they're zero?
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