I apologize for asking what seems to be such a basic question, but I would use some help with submitting a job to a remote server.
I have downloaded and installed hadoop locally in pseudo-distributed mode. I have written some Java code to submit a job. Here's the org.apache.hadoop.util.Tool and org.apache.hadoop.mapreduce.Mapper I've written. If I enable the conf.set("mapred.job.tracker", "localhost:9001") line, then I get the exception included below. If that line is disabled, then the job is completed. However, in reviewing the hadoop server administration page (http://localhost:50030/jobtracker.jsp) I don't see the job as processed by the server. Instead, I wonder if my Java code is simply running the necessary mapper Java code, bypassing the locally installed server. Thanks in advance. Alex public class OfflineDataTool extends Configured implements Tool { public int run(final String[] args) throws Exception { final Configuration conf = getConf(); //conf.set("mapred.job.tracker", "localhost:9001"); final Job job = new Job(conf); job.setJarByClass(getClass()); job.setJobName(getClass().getName()); job.setMapperClass(OfflineDataMapper.class); job.setInputFormatClass(TextInputFormat.class); job.setMapOutputKeyClass(Text.class); job.setMapOutputValueClass(Text.class); job.setOutputKeyClass(Text.class); job.setOutputValueClass(Text.class); FileInputFormat.addInputPath(job, new org.apache.hadoop.fs.Path(args[0])); final org.apache.hadoop.fs.Path output = new org.apache.hadoop.fs.Path(args[1]); FileSystem.get(conf).delete(output, true); FileOutputFormat.setOutputPath(job, output); return job.waitForCompletion(true) ? 0 : 1; } public static void main(final String[] args) { try { int result = ToolRunner.run(new Configuration(), new OfflineDataTool(), new String[]{"offline/input", "offline/output"}); log.error("result = {}", result); } catch (final Exception e) { throw new RuntimeException(e); } } } public class OfflineDataMapper extends Mapper<LongWritable, Text, Text, Text> { public OfflineDataMapper() { super(); } @Override protected void map(final LongWritable key, final Text value, final Context context) throws IOException, InterruptedException { final String inputString = value.toString(); OfflineDataMapper.log.error("inputString = {}", inputString); } }