java Runtime exec

Processor  executor = Runtime.getRuntime().exec(cmdLine, env, new File(workDir));

  StreamPrinter outPrinter = new StreamPrinter(
          executor.getInputStream(), null,
          SessionState.getConsole().getChildOutStream());
      StreamPrinter errPrinter = new StreamPrinter(
          executor.getErrorStream(), null,
          SessionState.getConsole().getChildErrStream());


      outPrinter.start();
      errPrinter.start();


      int exitVal = jobExecHelper.progressLocal(executor, getId());

public static class StreamPrinter extends Thread {
    InputStream is;
    String type;
    PrintStream os;


    public StreamPrinter(InputStream is, String type, PrintStream os) {
      this.is = is;
      this.type = type;
      this.os = os;
    }


    @Override
    public void run() {
      BufferedReader br = null;
      try {
        InputStreamReader isr = new InputStreamReader(is);
        br = new BufferedReader(isr);
        String line = null;
        if (type != null) {
          while ((line = br.readLine()) != null) {
            os.println(type + ">" + line);
          }
        } else {
          while ((line = br.readLine()) != null) {
            os.println(line);
          }
        }
        br.close();
        br=null;
      } catch (IOException ioe) {
        ioe.printStackTrace();
      }finally{
        IOUtils.closeStream(br);
      }
    }
  }

  public int progressLocal(Process runningJob, String taskId) {
    int exitVal = -101;
    try {
      exitVal = runningJob.waitFor(); //TODO: poll periodically
    } catch (InterruptedException e) {
    }


    if (exitVal != 0) {
      console.printError("Execution failed with exit status: " + exitVal);
      console.printError("Obtaining error information");
      if (HiveConf.getBoolVar(job, HiveConf.ConfVars.SHOW_JOB_FAIL_DEBUG_INFO)) {
        // Since local jobs are run sequentially, all relevant information is already available
        // Therefore, no need to fetch job debug info asynchronously
        localJobDebugger(exitVal, taskId);
      }
    } else {
      console.printInfo("Execution completed successfully");
      console.printInfo("Mapred Local Task Succeeded . Convert the Join into MapJoin");
    }
    return exitVal;
  }