Github user squito commented on the issue:
https://github.com/apache/spark/pull/17297
@sitalkedia how are you trying to run the test? Works fine for me on my
laptop on master. Note that the test is referencing a var which is only
defined if "spark.testing" is a system property:
https://github.com/apache/spark/blob/master/core/src/main/scala/org/apache/spark/executor/TaskMetrics.scala#L199
which it is in the sbt and maven build. (maybe doens't work inside an IDE?
I'd strongly just using `~testOnly` with sbt for faster dev iterations if
you're not already)
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