Attempt time threshold of job running in hadoop-maxwell

trssc

　　Attempt time threshold is a good feature to avoid time out or too slowly running of the job. However, you may need to run some scripts by forking a new sub-process sometimes. You may not get the progress of the process. In hadoop, if you do not report the progress during a time interval (defalut as 600s), it will consider the attemp is timeout, kill the current attemp process, and fork a new attemp.
　　In streaming way, you can set the mapred.task.timeout as much as you wish in command line running your job, e.g.,
　　hadoop jar test.jar -jobconf mapred.task.timeout=3600000
　　To develop a jar, you can set it like this:
　　long milliSeconds = 1000*60*60;
　　conf.setLong("mapred.task.timeout", milliSeconds);
　　NOTICE: The unit of timeout property is millisecond
　　Or, if you could, you need to report the progress to the job to aviod time out, e.g.,
　　context.progress()