viirya commented on issue #23272: [SPARK-26265][Core] Fix deadlock in BytesToBytesMap.MapIterator when locking both BytesToBytesMap.MapIterator and TaskMemoryManager URL: https://github.com/apache/spark/pull/23272#issuecomment-446190635 > last question: does the test always reproduce the bug? Or it has some randomness? If without the change, as I tried it locally 10 times, the test can reproduce the bug 10 times. But I'm not sure if it is 100% to reproduce the bug.
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