@AfterClass
  public static void cleanupTest() throws Exception {
    try {
      UTIL.shutdownMiniCluster();
      cluster = null;
      admin = null;
    } catch (Exception e) {
      LOG.warn("failure shutting down cluster", e);
    }
  }
Tests to verify master/ assignment manager functionality against rogue RS
hbase-server/src/test/java/org/apache/hadoop/hbase/master/assignment/TestRogueRSAssignment.java