Github user bzz commented on the issue:
https://github.com/apache/zeppelin/pull/1696
Spark 2.0 profile fails with very stragne
```
[ERROR] Failed to execute goal
org.apache.maven.plugins:maven-checkstyle-plugin:2.17:check
(checkstyle-fail-build) on project zeppelin: Failed during checkstyle
execution: Failed during checkstyle configuration: unable to parse
configuration stream - Element type "html" must be declared.:6:26 -> [Help 1]
[ERROR]
```
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