In addition to the fix made in JENKINS-2654, I would like to execute a batch task even after a build failure.

You could argue, that you could simply add a build step for that, but this is not possible in my case. We have a matrix project: while the "wrapper" project is executed on the master, each part of the matrix is executed on a slave. After a build I would like to generate some historical statistics (similar to the existing trend charts on the dashboard, but there's no plugin for that tool, yet). Since only the master has all the history data, I have to execute that task on the master. And I also want to execute that task after every build.