private void printFailures(
      JspWriter out, JobTracker tracker, JobID jobId, String kind, String cause)
      throws IOException {
    JobInProgress job = (JobInProgress) tracker.getJob(jobId);
    if (job == null) {
      out.print("<b>Job " + jobId + " not found.</b><br>\n");
      return;
    }

    boolean includeMap = false;
    boolean includeReduce = false;
    if (kind == null) {
      includeMap = true;
      includeReduce = true;
    } else if ("map".equals(kind)) {
      includeMap = true;
    } else if ("reduce".equals(kind)) {
      includeReduce = true;
    } else if ("all".equals(kind)) {
      includeMap = true;
      includeReduce = true;
    } else {
      out.print("<b>Kind " + kind + " not supported.</b><br>\n");
      return;
    }

    TaskStatus.State state = null;
    try {
      if (cause != null) {
        state = TaskStatus.State.valueOf(cause.toUpperCase());
        if (state != TaskStatus.State.FAILED && state != TaskStatus.State.KILLED) {
          out.print("<b>Cause '" + cause + "' is not an 'unsuccessful' state.</b><br>\n");
          return;
        }
      }
    } catch (IllegalArgumentException e) {
      out.print("<b>Cause '" + cause + "' not supported.</b><br>\n");
      return;
    }

    out.print("<table border=2 cellpadding=\"5\" cellspacing=\"2\">");
    out.print(
        "<tr><th>Attempt</th><th>Task</th><th>Machine</th><th>State</th>"
            + "<th>Error</th><th>Logs</th></tr>\n");
    if (includeMap) {
      TaskInProgress[] tips = job.getTasks(TaskType.MAP);
      for (int i = 0; i < tips.length; ++i) {
        printFailedAttempts(out, tracker, jobId, tips[i], state);
      }
    }
    if (includeReduce) {
      TaskInProgress[] tips = job.getTasks(TaskType.REDUCE);
      for (int i = 0; i < tips.length; ++i) {
        printFailedAttempts(out, tracker, jobId, tips[i], state);
      }
    }
    out.print("</table>\n");
  }
  public void _jspService(HttpServletRequest request, HttpServletResponse response)
      throws java.io.IOException, ServletException {

    PageContext pageContext = null;
    HttpSession session = null;
    ServletContext application = null;
    ServletConfig config = null;
    JspWriter out = null;
    Object page = this;
    JspWriter _jspx_out = null;
    PageContext _jspx_page_context = null;

    try {
      response.setContentType("text/html; charset=UTF-8");
      pageContext = _jspxFactory.getPageContext(this, request, response, null, true, 8192, true);
      _jspx_page_context = pageContext;
      application = pageContext.getServletContext();
      config = pageContext.getServletConfig();
      session = pageContext.getSession();
      out = pageContext.getOut();
      _jspx_out = out;
      _jspx_resourceInjector =
          (org.apache.jasper.runtime.ResourceInjector)
              application.getAttribute("com.sun.appserv.jsp.resource.injector");

      out.write('\n');

      JobTracker tracker = (JobTracker) application.getAttribute("job.tracker");
      ClusterStatus status = tracker.getClusterStatus();
      String trackerName = StringUtils.simpleHostname(tracker.getJobTrackerMachine());

      out.write("\n<html>\n<head>\n<title>");
      out.print(trackerName);
      out.write(
          " Hadoop Locality Statistics</title>\n<link rel=\"stylesheet\" type=\"text/css\" href=\"/static/hadoop.css\">\n</head>\n<body>\n<h1>");
      out.print(trackerName);
      out.write(" Hadoop Locality Statistics</h1>\n\n<b>State:</b> ");
      out.print(status.getJobTrackerState());
      out.write("<br>\n<b>Started:</b> ");
      out.print(new Date(tracker.getStartTime()));
      out.write("<br>\n<b>Version:</b> ");
      out.print(VersionInfo.getVersion());
      out.write(",\n                r");
      out.print(VersionInfo.getRevision());
      out.write("<br>\n<b>Compiled:</b> ");
      out.print(VersionInfo.getDate());
      out.write(" by\n                 ");
      out.print(VersionInfo.getUser());
      out.write("<br>\n<b>Identifier:</b> ");
      out.print(tracker.getTrackerIdentifier());
      out.write("<br>\n\n<hr>\n\n");

      Collection<JobInProgress> jobs = new ArrayList<JobInProgress>();
      jobs.addAll(tracker.completedJobs());
      jobs.addAll(tracker.runningJobs());
      jobs.addAll(tracker.failedJobs());
      int dataLocalMaps = 0;
      int rackLocalMaps = 0;
      int totalMaps = 0;
      int totalReduces = 0;
      for (JobInProgress job : jobs) {
        Counters counters = job.getCounters();
        dataLocalMaps += counters.getCounter(JobInProgress.Counter.DATA_LOCAL_MAPS);
        rackLocalMaps += counters.getCounter(JobInProgress.Counter.RACK_LOCAL_MAPS);
        totalMaps += counters.getCounter(JobInProgress.Counter.TOTAL_LAUNCHED_MAPS);
        totalReduces += counters.getCounter(JobInProgress.Counter.TOTAL_LAUNCHED_REDUCES);
      }
      int dataLocalMapPct = totalMaps == 0 ? 0 : (100 * dataLocalMaps) / totalMaps;
      int rackLocalMapPct = totalMaps == 0 ? 0 : (100 * rackLocalMaps) / totalMaps;
      int dataRackLocalMapPct =
          totalMaps == 0 ? 0 : (100 * (dataLocalMaps + rackLocalMaps)) / totalMaps;

      out.write("\n<p>\n<b>Data Local Maps:</b> ");
      out.print(dataLocalMaps);
      out.write(' ');
      out.write('(');
      out.print(dataLocalMapPct);
      out.write("%) <br>\n<b>Rack Local Maps:</b> ");
      out.print(rackLocalMaps);
      out.write(' ');
      out.write('(');
      out.print(rackLocalMapPct);
      out.write("%) <br>\n<b>Data or Rack Local:</b> ");
      out.print(dataLocalMaps + rackLocalMaps);
      out.write(' ');
      out.write('(');
      out.print(dataRackLocalMapPct);
      out.write("%) <br>\n<b>Total Maps:</b> ");
      out.print(totalMaps);
      out.write(" <br>\n<b>Total Reduces:</b> ");
      out.print(totalReduces);
      out.write(" <br>\n</p>\n\n");

      out.println(ServletUtil.htmlFooter());

      out.write('\n');
    } catch (Throwable t) {
      if (!(t instanceof SkipPageException)) {
        out = _jspx_out;
        if (out != null && out.getBufferSize() != 0) out.clearBuffer();
        if (_jspx_page_context != null) _jspx_page_context.handlePageException(t);
      }
    } finally {
      _jspxFactory.releasePageContext(_jspx_page_context);
    }
  }