Github user kiszk commented on a diff in the pull request: https://github.com/apache/spark/pull/21376#discussion_r189465557 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala --- @@ -107,7 +107,20 @@ object SQLConf { * run tests in parallel. At the time this feature was implemented, this was a no-op since we * run unit tests (that does not involve SparkSession) in serial order. */ - def get: SQLConf = confGetter.get()() + def get: SQLConf = { + if (TaskContext.get != null) { + new ReadOnlySQLConf(TaskContext.get()) + } else { + if (Utils.isTesting && SparkContext.getActive.isDefined) { --- End diff -- good check!!
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