Original design:

• HudsonTestCase.ComputerListenerImpl and JenkinsRule.ComputerListenerImpl register channels of launched slaves in order to close at the tearDown phase.
• They are registered to Jenkins with @TestExtension

Current status:

• They does not work.
• @TestExtension can be used for classes enclosed by test case classes.
• JenkinsRule.ComputerListenerImpl does not work at all.
• HudsonTestCase.ComputerListenerImpl worked in Jenkins < 1.482 for HudsonTestCase is a super class of enclosing classes. But in Jenkins 1.482, @TestExtension works only when the encolosing class is exactly the test case class.
  • This change is 5dd905f2a2 and 4557a436bf.

Problems caused by this:

• Log files of slaves are left open, and fail to delete temporary directories in Windows: JENKINS-18259