Github user SparkQA commented on the issue:
https://github.com/apache/spark/pull/21255
**[Test build #90493 has
finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/90493/testReport)**
for PR 21255 at commit
[`675726c`](https://github.com/apache/spark/commit/675726c326f2dd201e94f0def0b395befb87d303).
* 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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