Until we have TLS support for MirrorMaker for cross-dc kafka job replication in order to enable new JobQueue support for private wikis we need to temporarily disable MirrorMaker for jobs.
We don't really use the mirrored jobs right now and the only reason to mirror them is to avoid losing the jobs in case of an actual data center disaster, and as things stand now if an disastrous event occurs losing jobs will not be the biggest of our problems, so right now it's acceptable to just disable mirroring jobs.
Mirroring should be enabled back when we get TLS for kafka and mirror maker (Q1)