Github user jfrazee commented on the issue:
https://github.com/apache/nifi/pull/2308
FWIW, the tests pass on the following build as well:
```sh
$ mvn clean install -Dhadoop.version=2.8.2 -Dhadoop.guava.version=12.0.1
-Dhadoop.http.client.version=4.5.2 -Dhadoop.http.core.version=4.4.4
-Pcontrib-check
```---
