viirya commented on a change in pull request #31369:
URL: https://github.com/apache/spark/pull/31369#discussion_r566304481
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File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/state/StateStore.scala
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@@ -165,10 +165,18 @@ case class StateStoreMetrics(
object StateStoreMetrics {
def combine(allMetrics: Seq[StateStoreMetrics]): StateStoreMetrics = {
+ val customMetricNames =
allMetrics.flatMap(_.customMetrics.keySet).map(_.name).toSet
Review comment:
Something like this?
```scala
val distinctCustomMetrics = allMetrics.flatMap(_.customMetrics.keys).distinct
val customMetrics = allMetrics.flatMap(_.customMetrics)
val combinedCustomMetrics = distinctCustomMetrics.map { customMetric =>
val sameMetrics = customMetrics.filter(_ == customMetric)
val sumOfMetrics = sameMetrics.map(_._2).sum
customMetric -> sumOfMetrics
}.toMap
```
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