Github user andrewor14 commented on a diff in the pull request:
https://github.com/apache/spark/pull/10835#discussion_r50742068
--- Diff: core/src/test/scala/org/apache/spark/SparkFunSuite.scala ---
@@ -42,6 +42,8 @@ private[spark] abstract class SparkFunSuite extends
FunSuite with Logging {
test()
} finally {
logInfo(s"\n\n===== FINISHED $shortSuiteName: '$testName' =====\n")
+ // Avoid leaking map entries in tests that use accumulators without
SparkContext
+ Accumulators.clear()
--- End diff --
We want to isolate state across each test. Otherwise we might get an
accumulator that's registered in a previous test and that's confusing if it
fails.
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