fm.serve();
LOG.info("flume master 1 open ");
while (fm.getKnownNodes().size() == 0) {
Clock.sleep(1000);
}
fm.shutdown();
LOG.info("flume master 1 closed");
ConfigStore cfgStore2 = FlumeMaster.createConfigStore(cfg);
FlumeMaster fm2 = new FlumeMaster(new CommandManager(), new ConfigManager(
cfgStore2), new StatusManager(), new MasterAckManager(), cfg);