Github user zhzhan commented on the issue: https://github.com/apache/spark/pull/17180 The test failure us caused by call method on the map after `destructiveIterator()` has been called. It is illegal by the definition. https://github.com/apache/spark/blob/master/core/src/main/java/org/apache/spark/unsafe/map/BytesToBytesMap.java#L417 We should remove this test case as it does not follow the restriction. Please let me know the feedback.
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