Github user bogdanrdc closed the pull request at:
https://github.com/apache/spark/pull/17632
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GitHub user bogdanrdc opened a pull request:
https://github.com/apache/spark/pull/17632
[SPARK-19946][TESTS][BACKPORT-2.1] DebugFilesystem.assertNoOpenStreams
should report the open streams to help debugging
## What changes were proposed in this pull request?
Backport for PR #17
