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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