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I have seen several irrelevant PR failed on this test
https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/25254/consoleFull
https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/25248/
https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/25251/console
[Github] Pull Request #4342 (tdas)