Github user clockfly closed the pull request at:
https://github.com/apache/spark/pull/14973
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GitHub user clockfly opened a pull request:
https://github.com/apache/spark/pull/14973
[SPARK-17356][SQL][1.6] Fix out of memory issue when generating JSON for
TreeNode
This is a backport of PR https://github.com/apache/spark/pull/14915 to
branch 1.6.
## What changes were
