Preliminary investigation has revealed at least a possible hotfix which is being proposed to ci.ros2.org in Update xunit configuration tag name for report types to tools. by nuclearsandwich · Pull Request #569 · ros2/ci · GitHub
Before deploying the change to ros_buildfarm I’m going to investigate the underlying issue further. Since the failures are affecting dev jobs only we are considering steps to restore service to the rest of the build farm with scoped agent labels.