String tracker = conf.get(JTConfig.JT_IPC_ADDRESS, "clocal");
LOG.info("Using tracker: " + tracker);
if ("clocal".equals(tracker)) {
conf.setInt("mapreduce.job.maps", 1);
return new LocalJobRunnerWithFix(conf);
} else {
throw new IOException("Invalid \"" + JTConfig.JT_IPC_ADDRESS
+ "\" configuration value for LocalJobRunner : \""
+ tracker + "\"");