Github user joewitt commented on the issue:
https://github.com/apache/nifi/pull/2343
@mgaido91 it failed due to a checkstyle issue. You'll want to look at the
raw logs and scroll to the bottom. The key issue is
[[1;33mWARNING[m]
src/test/java/org/apache/nifi/processors/standard/TestRouteText.java:[34,8]
(imports) UnusedImports: Unused import -
org.apache.nifi.util.MockProcessSession.---
