import org.apache.hadoop.mapred.JobInProgress.KillInterruptedException; //导入依赖的package包/类
public void initJob(JobInProgress job) {
  try {
    JobStatus prevStatus = (JobStatus)job.getStatus().clone();
    job.initTasks();
    if (job.isJobEmpty()) {
      completeEmptyJob(job);
    } else if (!job.isSetupCleanupRequired()) {
      job.completeSetup();
    }
    JobStatus newStatus = (JobStatus)job.getStatus().clone();
    if (prevStatus.getRunState() != newStatus.getRunState()) {
      JobStatusChangeEvent event = 
        new JobStatusChangeEvent(job, EventType.RUN_STATE_CHANGED, prevStatus, 
            newStatus);
      for (JobInProgressListener listener : listeners) {
        listener.jobUpdated(event);
      }
    }
  } catch (KillInterruptedException kie) {
    killJob(job.getJobID());
  } catch (IOException ioe) {
    failJob(job);
  }
}
 

import org.apache.hadoop.mapred.JobInProgress.KillInterruptedException; //导入依赖的package包/类
public void initJob(JobInProgress job) {
  if (null == job) {
    LOG.info("Init on null job is not valid");
    return;
  }
       
  try {
    JobStatus prevStatus = (JobStatus)job.getStatus().clone();
    LOG.info("Initializing " + job.getJobID());
    job.initTasks();
    // Inform the listeners if the job state has changed
    // Note : that the job will be in PREP state.
    JobStatus newStatus = (JobStatus)job.getStatus().clone();
    if (prevStatus.getRunState() != newStatus.getRunState()) {
      JobStatusChangeEvent event = 
        new JobStatusChangeEvent(job, EventType.RUN_STATE_CHANGED, prevStatus, 
            newStatus);
      synchronized (JobTracker.this) {
        updateJobInProgressListeners(event);
      }
    }
  } catch (KillInterruptedException kie) {
    //   If job was killed during initialization, job state will be KILLED
    LOG.error("Job initialization interrupted:\n" +
        StringUtils.stringifyException(kie));
    killJob(job);
  } catch (Throwable t) {
    String failureInfo = 
      "Job initialization failed:\n" + StringUtils.stringifyException(t);
    // If the job initialization is failed, job state will be FAILED
    LOG.error(failureInfo);
    job.getStatus().setFailureInfo(failureInfo);
    failJob(job);
  }
}
 

import org.apache.hadoop.mapred.JobInProgress.KillInterruptedException; //导入依赖的package包/类
private JobInProgress submitJob(int state, int maps, int reduces, String pool)
    throws IOException {
  JobInProgress job = submitJobNoInitialization(state, maps, reduces, pool);
  try {
    job.initTasks();
  } catch (KillInterruptedException e) {
  }
  scheduler.update();
  return job;
}
 

import org.apache.hadoop.mapred.JobInProgress.KillInterruptedException; //导入依赖的package包/类
public void initJob(JobInProgress job) {
  if (null == job) {
    LOG.info("Init on null job is not valid");
    return;
  }
       
  try {
    JobStatus prevStatus = (JobStatus)job.getStatus().clone();
    LOG.info("Initializing " + job.getJobID());
    job.initTasks();
    // Inform the listeners if the job state has changed
    // Note : that the job will be in PREP state.
    JobStatus newStatus = (JobStatus)job.getStatus().clone();
    if (prevStatus.getRunState() != newStatus.getRunState()) {
      JobStatusChangeEvent event = 
        new JobStatusChangeEvent(job, EventType.RUN_STATE_CHANGED, prevStatus, 
            newStatus);
      synchronized (JobTracker.this) {
        updateJobInProgressListeners(event);
      }
    }
  } catch (KillInterruptedException kie) {
    //   If job was killed during initialization, job state will be KILLED
    LOG.error("Job initialization interrupted:\n" +
        StringUtils.stringifyException(kie));
    killJob(job);
  } catch (Throwable t) {
    // If the job initialization is failed, job state will be FAILED
    LOG.error("Job initialization failed:\n" +
        StringUtils.stringifyException(t));
    failJob(job);
  }
}
 

import org.apache.hadoop.mapred.JobInProgress.KillInterruptedException; //导入依赖的package包/类
public void initJob(JobInProgress job) {
  if (null == job) {
    LOG.info("Init on null job is not valid");
    return;
  }

  try {
    JobStatus prevStatus = (JobStatus)job.getStatus().clone();
    LOG.info("Initializing " + job.getJobID());
    job.initTasks();

    // Here the job *should* be in the PREP state.
    // From here there are 3 ways :
    //  - job requires setup : the job remains in PREP state and
    //    setup is launched to move the job in RUNNING state
    //  - job is complete (no setup required and no tasks) : complete
    //    the job and move it to SUCCEEDED
    //  - job has tasks but doesnt require setup : make the job RUNNING.
    if (job.isJobEmpty()) { // is the job empty?
      completeEmptyJob(job); // complete it
    } else if (!job.isSetupCleanupRequired()) { // setup/cleanup not required
      job.completeSetup(); // complete setup and make job running
    }

    // Inform the listeners if the job state has changed
    // Note : that the job will be in PREP state.
    JobStatus newStatus = (JobStatus)job.getStatus().clone();
    if (prevStatus.getRunState() != newStatus.getRunState()) {
      JobStatusChangeEvent event =
        new JobStatusChangeEvent(job, EventType.RUN_STATE_CHANGED, prevStatus,
            newStatus);
      synchronized (JobTracker.this) {
        updateJobInProgressListeners(event);
      }
    }
  } catch (KillInterruptedException kie) {
    //   If job was killed during initialization, job state will be KILLED
    LOG.error(job.getJobID() + ": Job initialization interrupted:\n" +
        StringUtils.stringifyException(kie));
    killJob(job);
  } catch (Throwable t) {
    // If the job initialization is failed, job state will be FAILED
    LOG.error(job.getJobID() + ": Job initialization failed:\n" +
        StringUtils.stringifyException(t));
    failJob(job);
  }
}
 

import org.apache.hadoop.mapred.JobInProgress.KillInterruptedException; //导入依赖的package包/类
/**
 * Initialize a job and inform the listeners about a state change, if any.
 * Other components in the framework should use this api to initialize a job.
 */
public void initJob(JobInProgress job) {
  if (null == job) {
    LOG.info("Init on null job is not valid");
    return;
  }
       
  try {
    JobStatus prevStatus = (JobStatus)job.getStatus().clone();
    LOG.info("Initializing " + job.getJobID());
    job.initTasks();
    // Here the job *should* be in the PREP state.
    // From here there are 3 ways :
    //  - job requires setup : the job remains in PREP state and 
    //    setup is launched to move the job in RUNNING state
    //  - job is complete (no setup required and no tasks) : complete 
    //    the job and move it to SUCCEEDED
    //  - job has tasks but doesnt require setup : make the job RUNNING.
    if (job.isJobEmpty()) { // is the job empty?
      completeEmptyJob(job); // complete it
    } else if (!job.isSetupCleanupRequired()) { // setup/cleanup not required
      job.completeSetup(); // complete setup and make job running
    }
    // Inform the listeners if the job state has changed
    // Note : 
    //   If job does not require setup, job state will be RUNNING
    //   If job is configured with 0 maps, 0 reduces and no setup-cleanup then 
    //   the job state will be SUCCEEDED
    //   otherwise, job state is PREP.
    JobStatus newStatus = (JobStatus)job.getStatus().clone();
    if (prevStatus.getRunState() != newStatus.getRunState()) {
      JobStatusChangeEvent event = 
        new JobStatusChangeEvent(job, EventType.RUN_STATE_CHANGED, prevStatus, 
            newStatus);
      synchronized (JobTracker.this) {
        updateJobInProgressListeners(event);
      }
    }
  } catch (KillInterruptedException kie) {
    //   If job was killed during initialization, job state will be KILLED
    LOG.error("Job initialization interrupted :\n" +
        StringUtils.stringifyException(kie));
    killJob(job);
  } catch (Throwable t) {
    //    If the job initialization is failed, job state will be FAILED
    LOG.error("Job initialization failed:\n" +
        StringUtils.stringifyException(t));
    failJob(job);
  }
}