dispatcher.register(TaskSchedulerEvent.EventType.class, new TaskSchedulerDispatcher());
dispatcher.register(LocalTaskEventType.class, new LocalTaskEventHandler());
initStagingDir();
queryMetrics = new TajoMetrics(queryId.toString());
super.init(systemConf);
} catch (Throwable t) {
LOG.error(t.getMessage(), t);
initError = t;