Jobs should not be restarted indefinitely

Zuul is willing to restart a job if it ends without Jenkins providing a status. In some cases Jenkins jobs can fail consistently in such a way that Zuul willingly loops them over and over forever. An example of a job where this behavior was seen--a test hangs and when Jenkins tries to kill it for the configured timeout, an exception is thrown communicating with the slave agent...

    test_iter_nodes_with_custom_node_iter OK  0.02
    test_leak_1 Build timed out (after 60 minutes). Marking the build as failed.
++ rm -rf /tmp/tmp.ojOMmvvlVW
ERROR 3438.30
    test_mismatched_etags FATAL: hudson.remoting.RequestAbortedException: java.io.IOException: Unexpected termination of the channel
hudson.remoting.RequestAbortedException: hudson.remoting.RequestAbortedException: java.io.IOException: Unexpected termination of the channel
 at hudson.remoting.RequestAbortedException.wrapForRethrow(RequestAbortedException.java:41)
 at hudson.remoting.RequestAbortedException.wrapForRethrow(RequestAbortedException.java:34)
 at hudson.remoting.Request.call(Request.java:174)
 at hudson.remoting.Channel.call(Channel.java:713)
 at hudson.Launcher$RemoteLauncher.kill(Launcher.java:887)
 at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:609)
 at hudson.model.Run.execute(Run.java:1593)
 at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
 at hudson.model.ResourceController.execute(ResourceController.java:88)
 at hudson.model.Executor.run(Executor.java:247)
Caused by: hudson.remoting.RequestAbortedException: java.io.IOException: Unexpected termination of the channel
 at hudson.remoting.Request.abort(Request.java:299)
 at hudson.remoting.Channel.terminate(Channel.java:773)
 at hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:69)
Caused by: java.io.IOException: Unexpected termination of the channel
 at hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:50)
Caused by: java.io.EOFException
 at java.io.ObjectInputStream$BlockDataInputStream.peekByte(ObjectInputStream.java:2596)
 at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1316)
 at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370)
 at hudson.remoting.Command.readFrom(Command.java:92)
 at hudson.remoting.ClassicCommandTransport.read(ClassicCommandTransport.java:72)
 at hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:48)

At first I thought the test loop was due to this patchset getting switched to a draft after testing began, but were that the case switching it back to non-draft should have allowed it to complete. Investigating logs on zuul.openstack.org it looks like Jenkins does not report a completion status for this job.