Github user carsonwang commented on a diff in the pull request:
https://github.com/apache/spark/pull/17009#discussion_r102656311
--- Diff:
sql/core/src/test/scala/org/apache/spark/sql/execution/ui/SQLListenerSuite.scala
---
@@ -147,6 +147,10 @@ class SQLListenerSuite extends SparkFunSuite with
SharedSQLContext with JsonTest
checkAnswer(listener.getExecutionMetrics(0),
accumulatorUpdates.mapValues(_ * 2))
+ // Non-existing driver accumulator updates should be filtered and no
exception will be thrown.
--- End diff --
I was doing some own experiments that adds physical operators at runtime.
The metrics of the added operators are not registered to the execution so I got
a NoSuchElementException.
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