public void run() {
try {
TaskAttemptID mapId = new TaskAttemptID(new TaskID(jobId, true, taskId), 0);
LOG.info("Starting task: " + mapId);
mapIds.add(mapId);
MapTask map =
new MapTask(systemJobFile.toString(), mapId, taskId, info.getSplitIndex(), 1);
map.setUser(UserGroupInformation.getCurrentUser().getShortUserName());
TaskRunner.setupChildMapredLocalDirs(map, localConf);
MapOutputFile mapOutput = new MapOutputFile();
mapOutput.setConf(localConf);
mapOutputFiles.put(mapId, mapOutput);
map.setJobFile(localJobFile.toString());
localConf.setUser(map.getUser());
map.localizeConfiguration(localConf);
map.setConf(localConf);
try {
map_tasks.getAndIncrement();
myMetrics.launchMap(mapId);
map.run(localConf, Job.this);
myMetrics.completeMap(mapId);
} finally {
map_tasks.getAndDecrement();
}
LOG.info("Finishing task: " + mapId);
} catch (Throwable e) {
this.storedException = e;
}
}
