Github user cloud-fan commented on the issue:
https://github.com/apache/spark/pull/22501
seems jenkins is broken, cc @shaneknapp
```
Command "/tmp/tmp.JfFHaoRFPU/3.5/bin/python -c "import setuptools,
tokenize;__file__='/home/jenkins/workspace/SparkPullRequestBuilder/python/setup.py';f=getattr(tokenize,
'open', open)(__file__);code=f.read().replace('\r\n',
'\n');f.close();exec(compile(code, __file__, 'exec'))" develop --no-deps"
failed with error code 1 in
/home/jenkins/workspace/SparkPullRequestBuilder/python/
You are using pip version 10.0.1, however version 18.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
Cleaning up temporary directory - /tmp/tmp.JfFHaoRFPU
[error] running
/home/jenkins/workspace/SparkPullRequestBuilder/dev/run-pip-tests ; received
return code 1
```
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