Github user SparkQA commented on the issue:
https://github.com/apache/spark/pull/22749
**[Test build #97694 has
finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/97694/testReport)**
for PR 22749 at commit
[`400f878`](https://github.com/apache/spark/commit/400f87817183640006140e2db1839f8d78a13856).
* This patch **fails due to an unknown error code, -9**.
* This patch **does not merge cleanly**.
* This patch adds no public classes.
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