Major Description
Gary, would you mind taking a look? No rush.
The test was added by HBASE-4282. It is a good test against data loss but it is around deferred flush which has changed a bunch since test was originally written.
I removed it over in hbase-8977 because I caught it hanging and breaking our build (hbase-8939). If you run it, you'll see it can't shutdown. We are bound up waiting on a regionserver to exit.