Github user iijima-satoshi commented on the issue:
https://github.com/apache/zeppelin/pull/2929
https://travis-ci.org/iijima-satoshi/zeppelin/builds/367533713
I tried to run travis ci several times. But #n.4 always failed with below
errors.
```
The job exceeded the maximum time limit for jobs, and has been terminated.
```
or
```
Done. Your build exited with 1.
grep: write error: No space left on device
```---
