Github user vrajat commented on the pull request:
https://github.com/apache/incubator-zeppelin/pull/55#issuecomment-137297368
Hmm. Travis failed because it lost connection to maven central.
INFO: Retrying request to {s}->https://repo.maven.apache.org:443
[WARNING] Could not transfer metadata
org.scala-tools:maven-scala-plugin/maven-metadata.xml from/to central
(https://repo.maven.apache.org/maven2): Connection reset
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