cloud-fan commented on a change in pull request #31451:
URL: https://github.com/apache/spark/pull/31451#discussion_r603905580



##########
File path: 
sql/core/src/main/scala/org/apache/spark/sql/execution/ui/SQLAppStatusListener.scala
##########
@@ -199,6 +199,9 @@ class SQLAppStatusListener(
 
   private def aggregateMetrics(exec: LiveExecutionData): Map[Long, String] = {
     val metricTypes = exec.metrics.map { m => (m.accumulatorId, m.metricType) 
}.toMap

Review comment:
       nit: this can be `val accumIds = exec.metrics.map(_. 
accumulatorId).toSet` now.

##########
File path: 
sql/core/src/main/scala/org/apache/spark/sql/execution/ui/SQLAppStatusListener.scala
##########
@@ -199,6 +199,9 @@ class SQLAppStatusListener(
 
   private def aggregateMetrics(exec: LiveExecutionData): Map[Long, String] = {
     val metricTypes = exec.metrics.map { m => (m.accumulatorId, m.metricType) 
}.toMap

Review comment:
       nit: this can be `val accumIds = 
exec.metrics.map(_.accumulatorId).toSet` now.




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