Hi,
I have observed that there are multiple ways to write driver method of Hadoop program. Following method is given in Hadoop Tutorial by Yahoo<http://developer.yahoo.com/hadoop/tutorial/module4.html> public void run(String inputPath, String outputPath) throws Exception { JobConf conf = new JobConf(WordCount.class); conf.setJobName("wordcount"); // the keys are words (strings) conf.setOutputKeyClass(Text.class); // the values are counts (ints) conf.setOutputValueClass(IntWritable.class); conf.setMapperClass(MapClass.class); conf.setReducerClass(Reduce.class); FileInputFormat.addInputPath(conf, new Path(inputPath)); FileOutputFormat.setOutputPath(conf, new Path(outputPath)); JobClient.runJob(conf); } and this method is given in Hadoop The Definitive Guide 2012 book by Oreilly. public static void main(String[] args) throws Exception { if (args.length != 2) { System.err.println("Usage: MaxTemperature <input path> <output path>"); System.exit(-1); } Job job = new Job(); job.setJarByClass(MaxTemperature.class); job.setJobName("Max temperature"); FileInputFormat.addInputPath(job, new Path(args[0])); FileOutputFormat.setOutputPath(job, new Path(args[1])); job.setMapperClass(MaxTemperatureMapper.class); job.setReducerClass(MaxTemperatureReducer.class); job.setOutputKeyClass(Text.class); job.setOutputValueClass(IntWritable.class); System.exit(job.waitForCompletion(true) ? 0 : 1); } While trying program given in Oreilly book I found that constructors of Job class are deprecated. As Oreilly book is based on Hadoop 2 (yarn) I was surprised to see that they have used deprecated class. I would like to know which method everyone uses? Regards, Chandrash3khar K0tekar Mobile - 8884631122
