Пример #1
0
  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');
      out.write('\n');
      out.write("\n<!DOCTYPE html>\n<html>\n<head>\n");
      JspHelper.createTitle(out, request, request.getParameter("filename"));
      out.write("\n</head>\n<body onload=\"document.goto.dir.focus()\">\n");

      Configuration conf = (Configuration) getServletContext().getAttribute(JspHelper.CURRENT_CONF);
      generateFileChunks(out, request, conf);

      out.write("\n<hr>\n");

      generateFileDetails(out, request, conf);

      out.write("\n\n<h2>Local logs</h2>\n<a href=\"/logs/\">Log</a> directory\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);
    }
  }
Пример #2
0
  public void _jspService(HttpServletRequest request, HttpServletResponse response)
      throws java.io.IOException, ServletException {

    JspFactory _jspxFactory = null;
    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 {
      _jspxFactory = JspFactory.getDefaultFactory();
      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;

      out.write('\n');
      out.write('\n');
      out.write("\n\n\n\n<html>\n<head>\n");
      JspHelper.createTitle(out, request, request.getParameter("filename"));
      out.write("\n</head>\n<body>\n<form action=\"/tail.jsp\" method=\"GET\">\n");

      generateFileChunks(out, request);

      out.write("\n</form>\n<hr>\n\n<h2>Local logs</h2>\n<a href=\"/logs/\">Log</a> directory\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 {
      if (_jspxFactory != null) _jspxFactory.releasePageContext(_jspx_page_context);
    }
  }
  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);
    }
  }
  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');
      out.write('\n');

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

      out.write('\n');
      out.write('\n');
      out.write('\n');

      String jobId = request.getParameter("jobid");
      if (jobId == null) {
        out.println("<h2>Missing 'jobid'!</h2>");
        return;
      }
      JobID jobIdObj = JobID.forName(jobId);
      String kind = request.getParameter("kind");
      String cause = request.getParameter("cause");

      out.write("\n\n<html>\n<title>Hadoop ");
      out.print(jobId);
      out.write(" failures on ");
      out.print(trackerName);
      out.write("</title>\n<body>\n<h1>Hadoop <a href=\"jobdetails.jsp?jobid=");
      out.print(jobId);
      out.write('"');
      out.write('>');
      out.print(jobId);
      out.write("</a>\nfailures on <a href=\"jobtracker.jsp\">");
      out.print(trackerName);
      out.write("</a></h1>\n\n");

      printFailures(out, tracker, jobIdObj, kind, cause);

      out.write("\n\n<hr>\n<a href=\"jobtracker.jsp\">Go back to JobTracker</a><br>\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);
    }
  }
public final class jobfailures_jsp extends org.apache.jasper.runtime.HttpJspBase
    implements org.apache.jasper.runtime.JspSourceDependent {

  private void printFailedAttempts(
      JspWriter out,
      JobTracker tracker,
      JobID jobId,
      TaskInProgress tip,
      TaskStatus.State failState)
      throws IOException {
    TaskStatus[] statuses = tip.getTaskStatuses();
    TaskID tipId = tip.getTIPId();
    for (int i = 0; i < statuses.length; ++i) {
      TaskStatus.State taskState = statuses[i].getRunState();
      if ((failState == null
              && (taskState == TaskStatus.State.FAILED || taskState == TaskStatus.State.KILLED))
          || taskState == failState) {
        String taskTrackerName = statuses[i].getTaskTracker();
        TaskTrackerStatus taskTracker = tracker.getTaskTrackerStatus(taskTrackerName);
        out.print(
            "<tr><td>"
                + statuses[i].getTaskID()
                + "</td><td><a href=\"taskdetails.jsp?jobid="
                + jobId
                + "&tipid="
                + tipId
                + "\">"
                + tipId
                + "</a></td>");
        if (taskTracker == null) {
          out.print("<td>" + taskTrackerName + "</td>");
        } else {
          out.print(
              "<td><a href=\"http://"
                  + taskTracker.getHost()
                  + ":"
                  + taskTracker.getHttpPort()
                  + "\">"
                  + taskTracker.getHost()
                  + "</a></td>");
        }
        out.print("<td>" + taskState + "</td>");
        out.print("<td><pre>");
        String[] failures = tracker.getTaskDiagnostics(statuses[i].getTaskID());
        if (failures == null) {
          out.print("&nbsp;");
        } else {
          for (int j = 0; j < failures.length; j++) {
            out.print(failures[j]);
            if (j < (failures.length - 1)) {
              out.print("\n-------\n");
            }
          }
        }
        out.print("</pre></td>");

        out.print("<td>");
        String taskLogUrl = null;
        if (taskTracker != null) {
          taskLogUrl =
              TaskLogServlet.getTaskLogUrl(
                  taskTracker.getHost(),
                  String.valueOf(taskTracker.getHttpPort()),
                  statuses[i].getTaskID().toString());
        }
        if (taskLogUrl != null) {
          String tailFourKBUrl = taskLogUrl + "&start=-4097";
          String tailEightKBUrl = taskLogUrl + "&start=-8193";
          String entireLogUrl = taskLogUrl;
          out.print("<a href=\"" + tailFourKBUrl + "\">Last 4KB</a><br/>");
          out.print("<a href=\"" + tailEightKBUrl + "\">Last 8KB</a><br/>");
          out.print("<a href=\"" + entireLogUrl + "\">All</a><br/>");
        } else {
          out.print("n/a"); // task tracker was lost
        }
        out.print("</td>");

        out.print("</tr>\n");
      }
    }
  }

  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");
  }

  private static final JspFactory _jspxFactory = JspFactory.getDefaultFactory();

  private static java.util.Vector _jspx_dependants;

  private org.apache.jasper.runtime.ResourceInjector _jspx_resourceInjector;

  public Object getDependants() {
    return _jspx_dependants;
  }

  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');
      out.write('\n');

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

      out.write('\n');
      out.write('\n');
      out.write('\n');

      String jobId = request.getParameter("jobid");
      if (jobId == null) {
        out.println("<h2>Missing 'jobid'!</h2>");
        return;
      }
      JobID jobIdObj = JobID.forName(jobId);
      String kind = request.getParameter("kind");
      String cause = request.getParameter("cause");

      out.write("\n\n<html>\n<title>Hadoop ");
      out.print(jobId);
      out.write(" failures on ");
      out.print(trackerName);
      out.write("</title>\n<body>\n<h1>Hadoop <a href=\"jobdetails.jsp?jobid=");
      out.print(jobId);
      out.write('"');
      out.write('>');
      out.print(jobId);
      out.write("</a>\nfailures on <a href=\"jobtracker.jsp\">");
      out.print(trackerName);
      out.write("</a></h1>\n\n");

      printFailures(out, tracker, jobIdObj, kind, cause);

      out.write("\n\n<hr>\n<a href=\"jobtracker.jsp\">Go back to JobTracker</a><br>\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);
    }
  }
}
Пример #6
0
public final class browseBlock_jsp extends org.apache.jasper.runtime.HttpJspBase
    implements org.apache.jasper.runtime.JspSourceDependent {

  static JspHelper jspHelper = new JspHelper();

  public void generateFileDetails(JspWriter out, HttpServletRequest req, Configuration conf)
      throws IOException, InterruptedException {

    int chunkSizeToView = 0;
    long startOffset = 0;
    int datanodePort;

    String blockIdStr = null;
    long currBlockId = 0;
    blockIdStr = req.getParameter("blockId");
    if (blockIdStr == null) {
      out.print("Invalid input (blockId absent)");
      return;
    }
    currBlockId = Long.parseLong(blockIdStr);

    String datanodePortStr = req.getParameter("datanodePort");
    if (datanodePortStr == null) {
      out.print("Invalid input (datanodePort absent)");
      return;
    }
    datanodePort = Integer.parseInt(datanodePortStr);

    String namenodeInfoPortStr = req.getParameter("namenodeInfoPort");
    int namenodeInfoPort = -1;
    if (namenodeInfoPortStr != null) namenodeInfoPort = Integer.parseInt(namenodeInfoPortStr);

    String chunkSizeToViewStr = req.getParameter("chunkSizeToView");
    if (chunkSizeToViewStr != null && Integer.parseInt(chunkSizeToViewStr) > 0) {
      chunkSizeToView = Integer.parseInt(chunkSizeToViewStr);
    } else {
      chunkSizeToView = JspHelper.getDefaultChunkSize(conf);
    }

    String startOffsetStr = req.getParameter("startOffset");
    if (startOffsetStr == null || Long.parseLong(startOffsetStr) < 0) startOffset = 0;
    else startOffset = Long.parseLong(startOffsetStr);

    String filename = HtmlQuoting.unquoteHtmlChars(req.getParameter("filename"));
    if (filename == null || filename.length() == 0) {
      out.print("Invalid input");
      return;
    }

    String blockSizeStr = req.getParameter("blockSize");
    long blockSize = 0;
    if (blockSizeStr == null || blockSizeStr.length() == 0) {
      out.print("Invalid input");
      return;
    }
    blockSize = Long.parseLong(blockSizeStr);

    String tokenString = req.getParameter(JspHelper.DELEGATION_PARAMETER_NAME);
    UserGroupInformation ugi = JspHelper.getUGI(req, conf);
    DFSClient dfs = JspHelper.getDFSClient(ugi, jspHelper.nameNodeAddr, conf);
    List<LocatedBlock> blocks =
        dfs.namenode.getBlockLocations(filename, 0, Long.MAX_VALUE).getLocatedBlocks();
    // Add the various links for looking at the file contents
    // URL for downloading the full file
    String downloadUrl =
        "http://"
            + req.getServerName()
            + ":"
            + +req.getServerPort()
            + "/streamFile"
            + URLEncoder.encode(filename, "UTF-8")
            + "?"
            + JspHelper.DELEGATION_PARAMETER_NAME
            + "="
            + tokenString;
    out.print("<a name=\"viewOptions\"></a>");
    out.print("<a href=\"" + downloadUrl + "\">Download this file</a><br>");

    DatanodeInfo chosenNode;
    // URL for TAIL
    LocatedBlock lastBlk = blocks.get(blocks.size() - 1);
    long blockId = lastBlk.getBlock().getBlockId();
    try {
      chosenNode = jspHelper.bestNode(lastBlk);
    } catch (IOException e) {
      out.print(e.toString());
      dfs.close();
      return;
    }
    String fqdn = InetAddress.getByName(chosenNode.getHost()).getCanonicalHostName();
    String tailUrl =
        "http://"
            + fqdn
            + ":"
            + chosenNode.getInfoPort()
            + "/tail.jsp?filename="
            + URLEncoder.encode(filename, "UTF-8")
            + "&namenodeInfoPort="
            + namenodeInfoPort
            + "&chunkSizeToView="
            + chunkSizeToView
            + "&referrer="
            + URLEncoder.encode(req.getRequestURL() + "?" + req.getQueryString(), "UTF-8")
            + JspHelper.getDelegationTokenUrlParam(tokenString);
    out.print("<a href=\"" + tailUrl + "\">Tail this file</a><br>");

    out.print("<form action=\"/browseBlock.jsp\" method=GET>");
    out.print("<b>Chunk size to view (in bytes, up to file's DFS block size): </b>");
    out.print("<input type=\"hidden\" name=\"blockId\" value=\"" + currBlockId + "\">");
    out.print("<input type=\"hidden\" name=\"blockSize\" value=\"" + blockSize + "\">");
    out.print("<input type=\"hidden\" name=\"startOffset\" value=\"" + startOffset + "\">");
    out.print("<input type=\"hidden\" name=\"filename\" value=\"" + filename + "\">");
    out.print("<input type=\"hidden\" name=\"datanodePort\" value=\"" + datanodePort + "\">");
    out.print(
        "<input type=\"hidden\" name=\"namenodeInfoPort\" value=\"" + namenodeInfoPort + "\">");
    out.print(
        "<input type=\"text\" name=\"chunkSizeToView\" value="
            + chunkSizeToView
            + " size=10 maxlength=10>");
    out.print("&nbsp;&nbsp;<input type=\"submit\" name=\"submit\" value=\"Refresh\">");
    out.print("</form>");
    out.print("<hr>");
    out.print("<a name=\"blockDetails\"></a>");
    out.print("<B>Total number of blocks: " + blocks.size() + "</B><br>");
    // generate a table and dump the info
    out.println("\n<table>");
    for (LocatedBlock cur : blocks) {
      out.print("<tr>");
      blockId = cur.getBlock().getBlockId();
      blockSize = cur.getBlock().getNumBytes();
      String blk = "blk_" + Long.toString(blockId);
      out.print("<td>" + Long.toString(blockId) + ":</td>");
      DatanodeInfo[] locs = cur.getLocations();
      for (int j = 0; j < locs.length; j++) {
        String datanodeAddr = locs[j].getName();
        datanodePort =
            Integer.parseInt(
                datanodeAddr.substring(datanodeAddr.indexOf(':') + 1, datanodeAddr.length()));
        fqdn = InetAddress.getByName(locs[j].getHost()).getCanonicalHostName();
        String blockUrl =
            "http://"
                + fqdn
                + ":"
                + locs[j].getInfoPort()
                + "/browseBlock.jsp?blockId="
                + Long.toString(blockId)
                + "&blockSize="
                + blockSize
                + "&filename="
                + URLEncoder.encode(filename, "UTF-8")
                + "&datanodePort="
                + datanodePort
                + "&genstamp="
                + cur.getBlock().getGenerationStamp()
                + "&namenodeInfoPort="
                + namenodeInfoPort
                + "&chunkSizeToView="
                + chunkSizeToView;
        out.print(
            "<td>&nbsp</td>" + "<td><a href=\"" + blockUrl + "\">" + datanodeAddr + "</a></td>");
      }
      out.println("</tr>");
    }
    out.println("</table>");
    out.print("<hr>");
    String namenodeHost = jspHelper.nameNodeAddr.getHostName();
    out.print(
        "<br><a href=\"http://"
            + InetAddress.getByName(namenodeHost).getCanonicalHostName()
            + ":"
            + namenodeInfoPort
            + "/dfshealth.jsp\">Go back to DFS home</a>");
    dfs.close();
  }

  public void generateFileChunks(JspWriter out, HttpServletRequest req, Configuration conf)
      throws IOException, InterruptedException {
    long startOffset = 0;
    int datanodePort = 0;
    int chunkSizeToView = 0;

    String namenodeInfoPortStr = req.getParameter("namenodeInfoPort");
    int namenodeInfoPort = -1;
    if (namenodeInfoPortStr != null) namenodeInfoPort = Integer.parseInt(namenodeInfoPortStr);

    String filename = HtmlQuoting.unquoteHtmlChars(req.getParameter("filename"));
    if (filename == null) {
      out.print("Invalid input (filename absent)");
      return;
    }

    String blockIdStr = null;
    long blockId = 0;
    blockIdStr = req.getParameter("blockId");
    if (blockIdStr == null) {
      out.print("Invalid input (blockId absent)");
      return;
    }
    blockId = Long.parseLong(blockIdStr);

    String tokenString = req.getParameter(JspHelper.DELEGATION_PARAMETER_NAME);
    UserGroupInformation ugi = JspHelper.getUGI(req, conf);
    final DFSClient dfs = JspHelper.getDFSClient(ugi, jspHelper.nameNodeAddr, conf);

    Token<BlockTokenIdentifier> accessToken = BlockTokenSecretManager.DUMMY_TOKEN;
    if (conf.getBoolean(DFSConfigKeys.DFS_BLOCK_ACCESS_TOKEN_ENABLE_KEY, false)) {
      List<LocatedBlock> blks =
          dfs.namenode.getBlockLocations(filename, 0, Long.MAX_VALUE).getLocatedBlocks();
      if (blks == null || blks.size() == 0) {
        out.print("Can't locate file blocks");
        dfs.close();
        return;
      }
      for (int i = 0; i < blks.size(); i++) {
        if (blks.get(i).getBlock().getBlockId() == blockId) {
          accessToken = blks.get(i).getBlockToken();
          break;
        }
      }
    }

    String blockGenStamp = null;
    long genStamp = 0;
    blockGenStamp = req.getParameter("genstamp");
    if (blockGenStamp == null) {
      out.print("Invalid input (genstamp absent)");
      return;
    }
    genStamp = Long.parseLong(blockGenStamp);

    String blockSizeStr;
    long blockSize = 0;
    blockSizeStr = req.getParameter("blockSize");
    if (blockSizeStr == null) {
      out.print("Invalid input (blockSize absent)");
      return;
    }
    blockSize = Long.parseLong(blockSizeStr);

    String chunkSizeToViewStr = req.getParameter("chunkSizeToView");
    if (chunkSizeToViewStr != null && Integer.parseInt(chunkSizeToViewStr) > 0)
      chunkSizeToView = Integer.parseInt(chunkSizeToViewStr);
    else chunkSizeToView = JspHelper.getDefaultChunkSize(conf);

    String startOffsetStr = req.getParameter("startOffset");
    if (startOffsetStr == null || Long.parseLong(startOffsetStr) < 0) startOffset = 0;
    else startOffset = Long.parseLong(startOffsetStr);

    String datanodePortStr = req.getParameter("datanodePort");
    if (datanodePortStr == null) {
      out.print("Invalid input (datanodePort absent)");
      return;
    }
    datanodePort = Integer.parseInt(datanodePortStr);
    out.print("<h3>File: ");
    JspHelper.printPathWithLinks(
        HtmlQuoting.quoteHtmlChars(filename), out, namenodeInfoPort, tokenString);
    out.print("</h3><hr>");
    String parent = new File(filename).getParent();
    JspHelper.printGotoForm(out, namenodeInfoPort, tokenString, HtmlQuoting.quoteHtmlChars(parent));
    out.print("<hr>");
    out.print(
        "<a href=\"http://"
            + req.getServerName()
            + ":"
            + req.getServerPort()
            + "/browseDirectory.jsp?dir="
            + URLEncoder.encode(parent, "UTF-8")
            + "&namenodeInfoPort="
            + namenodeInfoPort
            + "\"><i>Go back to dir listing</i></a><br>");
    out.print("<a href=\"#viewOptions\">Advanced view/download options</a><br>");
    out.print("<hr>");

    // Determine the prev & next blocks
    long nextStartOffset = 0;
    long nextBlockSize = 0;
    String nextBlockIdStr = null;
    String nextGenStamp = null;
    String nextHost = req.getServerName();
    int nextPort = req.getServerPort();
    int nextDatanodePort = datanodePort;
    // determine data for the next link
    if (startOffset + chunkSizeToView >= blockSize) {
      // we have to go to the next block from this point onwards
      List<LocatedBlock> blocks =
          dfs.namenode.getBlockLocations(filename, 0, Long.MAX_VALUE).getLocatedBlocks();
      for (int i = 0; i < blocks.size(); i++) {
        if (blocks.get(i).getBlock().getBlockId() == blockId) {
          if (i != blocks.size() - 1) {
            LocatedBlock nextBlock = blocks.get(i + 1);
            nextBlockIdStr = Long.toString(nextBlock.getBlock().getBlockId());
            nextGenStamp = Long.toString(nextBlock.getBlock().getGenerationStamp());
            nextStartOffset = 0;
            nextBlockSize = nextBlock.getBlock().getNumBytes();
            DatanodeInfo d = jspHelper.bestNode(nextBlock);
            String datanodeAddr = d.getName();
            nextDatanodePort =
                Integer.parseInt(
                    datanodeAddr.substring(datanodeAddr.indexOf(':') + 1, datanodeAddr.length()));
            nextHost = InetAddress.getByName(d.getHost()).getCanonicalHostName();
            nextPort = d.getInfoPort();
          }
        }
      }
    } else {
      // we are in the same block
      nextBlockIdStr = blockIdStr;
      nextStartOffset = startOffset + chunkSizeToView;
      nextBlockSize = blockSize;
      nextGenStamp = blockGenStamp;
    }
    String nextUrl = null;
    if (nextBlockIdStr != null) {
      nextUrl =
          "http://"
              + nextHost
              + ":"
              + nextPort
              + "/browseBlock.jsp?blockId="
              + nextBlockIdStr
              + "&blockSize="
              + nextBlockSize
              + "&startOffset="
              + nextStartOffset
              + "&genstamp="
              + nextGenStamp
              + "&filename="
              + URLEncoder.encode(filename, "UTF-8")
              + "&chunkSizeToView="
              + chunkSizeToView
              + "&datanodePort="
              + nextDatanodePort
              + "&namenodeInfoPort="
              + namenodeInfoPort
              + JspHelper.getDelegationTokenUrlParam(tokenString);
      out.print("<a href=\"" + nextUrl + "\">View Next chunk</a>&nbsp;&nbsp;");
    }
    // determine data for the prev link
    String prevBlockIdStr = null;
    String prevGenStamp = null;
    long prevStartOffset = 0;
    long prevBlockSize = 0;
    String prevHost = req.getServerName();
    int prevPort = req.getServerPort();
    int prevDatanodePort = datanodePort;
    if (startOffset == 0) {
      List<LocatedBlock> blocks =
          dfs.namenode.getBlockLocations(filename, 0, Long.MAX_VALUE).getLocatedBlocks();
      for (int i = 0; i < blocks.size(); i++) {
        if (blocks.get(i).getBlock().getBlockId() == blockId) {
          if (i != 0) {
            LocatedBlock prevBlock = blocks.get(i - 1);
            prevBlockIdStr = Long.toString(prevBlock.getBlock().getBlockId());
            prevGenStamp = Long.toString(prevBlock.getBlock().getGenerationStamp());
            prevStartOffset = prevBlock.getBlock().getNumBytes() - chunkSizeToView;
            if (prevStartOffset < 0) prevStartOffset = 0;
            prevBlockSize = prevBlock.getBlock().getNumBytes();
            DatanodeInfo d = jspHelper.bestNode(prevBlock);
            String datanodeAddr = d.getName();
            prevDatanodePort =
                Integer.parseInt(
                    datanodeAddr.substring(datanodeAddr.indexOf(':') + 1, datanodeAddr.length()));
            prevHost = InetAddress.getByName(d.getHost()).getCanonicalHostName();
            prevPort = d.getInfoPort();
          }
        }
      }
    } else {
      // we are in the same block
      prevBlockIdStr = blockIdStr;
      prevStartOffset = startOffset - chunkSizeToView;
      if (prevStartOffset < 0) prevStartOffset = 0;
      prevBlockSize = blockSize;
      prevGenStamp = blockGenStamp;
    }

    String prevUrl = null;
    if (prevBlockIdStr != null) {
      prevUrl =
          "http://"
              + prevHost
              + ":"
              + prevPort
              + "/browseBlock.jsp?blockId="
              + prevBlockIdStr
              + "&blockSize="
              + prevBlockSize
              + "&startOffset="
              + prevStartOffset
              + "&filename="
              + URLEncoder.encode(filename, "UTF-8")
              + "&chunkSizeToView="
              + chunkSizeToView
              + "&genstamp="
              + prevGenStamp
              + "&datanodePort="
              + prevDatanodePort
              + "&namenodeInfoPort="
              + namenodeInfoPort
              + JspHelper.getDelegationTokenUrlParam(tokenString);
      out.print("<a href=\"" + prevUrl + "\">View Prev chunk</a>&nbsp;&nbsp;");
    }
    out.print("<hr>");
    out.print("<textarea cols=\"100\" rows=\"25\" wrap=\"virtual\" style=\"width:100%\" READONLY>");
    try {
      jspHelper.streamBlockInAscii(
          new InetSocketAddress(req.getServerName(), datanodePort),
          blockId,
          accessToken,
          genStamp,
          blockSize,
          startOffset,
          chunkSizeToView,
          out,
          conf);
    } catch (Exception e) {
      out.print(e);
    }
    out.print("</textarea>");
    dfs.close();
  }

  private static final JspFactory _jspxFactory = JspFactory.getDefaultFactory();

  private static java.util.Vector _jspx_dependants;

  private org.apache.jasper.runtime.ResourceInjector _jspx_resourceInjector;

  public Object getDependants() {
    return _jspx_dependants;
  }

  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');
      out.write('\n');
      out.write("\n<!DOCTYPE html>\n<html>\n<head>\n");
      JspHelper.createTitle(out, request, request.getParameter("filename"));
      out.write("\n</head>\n<body onload=\"document.goto.dir.focus()\">\n");

      Configuration conf = (Configuration) getServletContext().getAttribute(JspHelper.CURRENT_CONF);
      generateFileChunks(out, request, conf);

      out.write("\n<hr>\n");

      generateFileDetails(out, request, conf);

      out.write("\n\n<h2>Local logs</h2>\n<a href=\"/logs/\">Log</a> directory\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);
    }
  }
}