Oracle bought Sun in January 2010, and Hudson came with it. Kawaguchi left Oracle that spring and founded InfraDNA to sell Hudson support. In November 2010 Oracle's migration of java.net, the Sun site that hosted Hudson's code and mailing lists, raised the question of who controlled the project, and in December Oracle applied to register "Hudson" as a trademark in the United States and the European Union.
The developers objected to the leverage, not to Oracle's engineers: a project that did not own its name would be "beholden to Oracle's whims." On 11 January 2011 they proposed renaming it Jenkins 8,793 , another butler's name for the butler logo, with the trademark held outside any company. The community vote on 29 January passed by 214 to 14; on 1 February Oracle said it would continue Hudson itself.
The fork was lopsided. Nearly all committers, plugin developers and repositories moved to the jenkinsci organization, and Jenkins 1.396 shipped on 2 February 2011. Oracle gave Hudson to the Eclipse Foundation; its last release, 3.3.3, came in February 2016, and it was declared obsolete in February 2017. A trademark, not the code or its license, had decided who could lead the project, and Jenkins arranged its affairs so that it could not happen again.