Hi Igniters, There was warning of building of the core module[1].
The reason was guava-dependency duplication in pom.xml I removed outdated dependency and warning was gone. I checked compilation with clean local repo, it passed well. My fix was merged to the master branch, thanks to Anton Vinogradov . [1] https://issues.apache.org/jira/browse/IGNITE-5882 -- Best Regards, Vyacheslav D.