String dataDir = baseDir + "/data";
String logDir = baseDir + "/log";
_conf = new ZkConfiguration();
_conf.setZKServers("localhost:" + PORT);
_conf.setZKRootPath("/zk_testsystem");
_zkServer = new ZkServer(dataDir, logDir, new DefaultNameSpaceImpl(_conf), PORT);
_zkServer.start();
LOG.info("~~~~~~~~~~~~~~~ zk system started ~~~~~~~~~~~~~~~");
}