Github user eddies commented on the pull request:
https://github.com/apache/incubator-zeppelin/pull/728#issuecomment-190635289
FYI, 18b4f55 is failing CI with the following:
```
[ERROR] bower leaflet.heat#v0.2.0 ECMDERR Failed to
execute "git ls-remote --tags --heads
g...@github.com:Leaflet/Leaflet.heat.git", exit code of #128 Warning:
Permanently added the RSA host key for IP address '192.30.252.131' to the list
of known hosts. Permission denied (publickey). fatal: Could not read from
remote repository. Please make sure you have the correct access rights and the
repository exists.
[ERROR]
[ERROR] Additional error details:
[ERROR] Warning: Permanently added the RSA host key for IP address
'192.30.252.131' to the list of known hosts.
[ERROR] Permission denied (publickey).
[ERROR] fatal: Could not read from remote repository.
[ERROR]
[ERROR] Please make sure you have the correct access rights
[ERROR] and the repository exists.
```
Unfortunately, leaflet.heat does not support bower (the maintainer has
steadfastly rejected any pull requests to include a bower.json). So I
explicitly added the git url. But it looks like the host resolution on Travis
is unhappy with the address it's getting for github.com.
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