@Override
    public void close() throws IOException {
      this.sink.stop();
      if (this.admin != null) {
        this.admin.close();
      }
    }
'Target' dependent on 'mode'. Could be Tables or RegionServers or ZNodes. Passed on the
command-line as arguments.
hbase-server/src/main/java/org/apache/hadoop/hbase/tool/CanaryTool.java