public boolean isReadShortCircuitOn() {
    final String propName = "hbase.tests.use.shortcircuit.reads";
    String readOnProp = System.getProperty(propName);
    if (readOnProp != null) {
      return Boolean.parseBoolean(readOnProp);
    } else {
      return conf.getBoolean(propName, false);
    }
  }
Get the HBase setting for dfs.client.read.shortcircuit from the conf or a system property. This
allows to specify this parameter on the command line. If not set, default is true.
hbase-testing-util/src/main/java/org/apache/hadoop/hbase/HBaseTestingUtility.java