@Override
    public void run() {
      try {
        runInternal();
      } catch (IOException ex) {
        LOG.error(ex.toString(), ex);
      }
    }
Generates a list of random port numbers in the sorted order. A sorted order makes sense if we
ever want to refer to these servers by their index in the returned array, e.g. server #0, #1,
etc.
hbase-diagnostics/src/test/java/org/apache/hadoop/hbase/util/ProcessBasedLocalHBaseCluster.java