Github user wesm commented on the issue:
https://github.com/apache/zeppelin/pull/1574
@felixcheung it looks like these builds were triggered by a merge on a
different branch. see for example
https://github.com/apache/zeppelin/commit/e259feacf78770b5dc412c0642216acdce17008f
in looking through your build history, it seems there is quite a bit of
merging going on, and you may have been inadvertently triggering a lot of
builds because of a quirk in Travis CI and GitHub's hooks:
https://github.com/apache/zeppelin/commit/c4cf1abbf06ddf4447dacc886060ea4c1238464e
I would recommend advising the Zeppelin contributors to avoid using `git
merge` altogether because of this and prefer instead to rebase or cherry-pick.
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