1. A method for restarting the daemon with new configuration.
public static void restartCluster(Hashtable<String,Long> props, String confFile) throws Exception;
2. A method for resetting the daemon with default configuration.
public void resetCluster() throws Exception;
3. A method for waiting until daemon to stop.
public void waitForClusterToStop() throws Exception;
4. A method for waiting until daemon to start.
public void waitForClusterToStart() throws Exception;
5. A method for checking the job whether it has started or not.
public boolean isJobStarted(JobID id) throws IOException;
6. A method for checking the task whether it has started or not.
public boolean isTaskStarted(TaskInfo taskInfo) throws IOException;