src/webapps/hdfs/dfsnodelist.jsp - hadoop - Git at Google

 <%@ page
 contentType="text/html; charset=UTF-8"
 	import="javax.servlet.*"
 	import="javax.servlet.http.*"
 	import="java.io.*"
 	import="java.util.*"
 	import="org.apache.hadoop.fs.*"
 	import="org.apache.hadoop.hdfs.*"
 	import="org.apache.hadoop.hdfs.server.common.*"
 	import="org.apache.hadoop.hdfs.server.namenode.*"
 	import="org.apache.hadoop.hdfs.server.datanode.*"
 	import="org.apache.hadoop.hdfs.protocol.*"
 	import="org.apache.hadoop.util.*"
 	import="java.text.DateFormat"
 	import="java.lang.Math"
 	import="java.net.URLEncoder"
 %>
 <%!
 	JspHelper jspHelper = new JspHelper();

 	int rowNum = 0;
 	int colNum = 0;

 	String rowTxt() { colNum = 0;
 	return "<tr class=\"" + (((rowNum++)%2 == 0)? "rowNormal" : "rowAlt")
 	+ "\"> "; }
 	String colTxt() { return "<td id=\"col" + ++colNum + "\"> "; }
 	void counterReset () { colNum = 0; rowNum = 0 ; }

 	long diskBytes = 1024 * 1024 * 1024;
 	String diskByteStr = "GB";

 	String sorterField = null;
 	String sorterOrder = null;
 	String whatNodes = "LIVE";

 String NodeHeaderStr(String name) {
 	String ret = "class=header";
 	String order = "ASC";
 	if ( name.equals( sorterField ) ) {
 		ret += sorterOrder;
 		if ( sorterOrder.equals("ASC") )
 			order = "DSC";
 	}
 	ret += " onClick=\"window.document.location=" +
 	"'/dfsnodelist.jsp?whatNodes="+whatNodes+"&sorter/field=" + name + "&sorter/order=" +
 	order + "'\" title=\"sort on this column\"";

 	return ret;
 }

 void generateDecommissioningNodeData(JspWriter out, DatanodeDescriptor d,
       String suffix, boolean alive, int nnHttpPort) throws IOException {
     String url = "http://" + d.getHostName() + ":" + d.getInfoPort()
       + "/browseDirectory.jsp?namenodeInfoPort=" + nnHttpPort + "&dir="
       + URLEncoder.encode("/", "UTF-8");

     String name = d.getHostName() + ":" + d.getPort();
     if (!name.matches("\\d+\\.\\d+.\\d+\\.\\d+.*"))
       name = name.replaceAll("\\.[^.:]*", "");
     int idx = (suffix != null && name.endsWith(suffix)) ? name
         .indexOf(suffix) : -1;

     out.print(rowTxt() + "<td class=\"name\"><a title=\"" + d.getHost() + ":"
         + d.getPort() + "\" href=\"" + url + "\">"
         + ((idx > 0) ? name.substring(0, idx) : name) + "</a>"
         + ((alive) ? "" : "\n"));
       if (!alive) {
         return;
       }

     long decommRequestTime = d.decommissioningStatus.getStartTime();
     long timestamp = d.getLastUpdate();
     long currentTime = System.currentTimeMillis();
     long hoursSinceDecommStarted = (currentTime - decommRequestTime)/3600000;
     long remainderMinutes = ((currentTime - decommRequestTime)/60000) % 60;
     out.print("<td class=\"lastcontact\"> "
         + ((currentTime - timestamp) / 1000)
         + "<td class=\"underreplicatedblocks\">"
         + d.decommissioningStatus.getUnderReplicatedBlocks()
         + "<td class=\"blockswithonlydecommissioningreplicas\">"
         + d.decommissioningStatus.getDecommissionOnlyReplicas()
         + "<td class=\"underrepblocksinfilesunderconstruction\">"
         + d.decommissioningStatus.getUnderReplicatedInOpenFiles()
         + "<td class=\"timesincedecommissionrequest\">"
         + hoursSinceDecommStarted + " hrs " + remainderMinutes + " mins"
         + "\n");
 }


 public void generateNodeData( JspWriter out, DatanodeDescriptor d,
 		String suffix, boolean alive,
 		int nnHttpPort )
 throws IOException {

 	/* Say the datanode is dn1.hadoop.apache.org with ip 192.168.0.5
 we use:
 1) d.getHostName():d.getPort() to display.
 Domain and port are stripped if they are common across the nodes.
 i.e. "dn1"
 2) d.getHost():d.Port() for "title".
 i.e. "192.168.0.5:50010"
 3) d.getHostName():d.getInfoPort() for url.
 i.e. "http://dn1.hadoop.apache.org:50075/..."
 Note that "d.getHost():d.getPort()" is what DFS clients use
 to interact with datanodes.
 	 */
 	// from nn_browsedfscontent.jsp:
 	String url = "http://" + d.getHostName() + ":" + d.getInfoPort() +
 	"/browseDirectory.jsp?namenodeInfoPort=" +
 	nnHttpPort + "&dir=" +
 	URLEncoder.encode("/", "UTF-8");

 	String name = d.getHostName() + ":" + d.getPort();
 	if ( !name.matches( "\\d+\\.\\d+.\\d+\\.\\d+.*" ) )
 		name = name.replaceAll( "\\.[^.:]*", "" );
 	int idx = (suffix != null && name.endsWith( suffix )) ?
 			name.indexOf( suffix ) : -1;

 			out.print( rowTxt() + "<td class=\"name\"><a title=\""
 					+ d.getHost() + ":" + d.getPort() +
 					"\" href=\"" + url + "\">" +
 					(( idx > 0 ) ? name.substring(0, idx) : name) + "</a>" +
 					(( alive ) ? "" : "\n") );
 			if ( !alive )
 				return;

 			long c = d.getCapacity();
 			long u = d.getDfsUsed();
 			long nu = d.getNonDfsUsed();
 			long r = d.getRemaining();
 			String percentUsed = StringUtils.limitDecimalTo2(d.getDfsUsedPercent());
 			String percentRemaining = StringUtils.limitDecimalTo2(d.getRemainingPercent());

 			String adminState = (d.isDecommissioned() ? "Decommissioned" :
 				(d.isDecommissionInProgress() ? "Decommission In Progress":
 				"In Service"));

 			long timestamp = d.getLastUpdate();
 			long currentTime = System.currentTimeMillis();
 			out.print("<td class=\"lastcontact\"> " +
 					((currentTime - timestamp)/1000) +
 					"<td class=\"adminstate\">" +
 					adminState +
 					"<td align=\"right\" class=\"capacity\">" +
 					StringUtils.limitDecimalTo2(c*1.0/diskBytes) +
 					"<td align=\"right\" class=\"used\">" +
 					StringUtils.limitDecimalTo2(u*1.0/diskBytes) +
 					"<td align=\"right\" class=\"nondfsused\">" +
 					StringUtils.limitDecimalTo2(nu*1.0/diskBytes) +
 					"<td align=\"right\" class=\"remaining\">" +
 					StringUtils.limitDecimalTo2(r*1.0/diskBytes) +
 					"<td align=\"right\" class=\"pcused\">" + percentUsed +
 					"<td class=\"pcused\">" +
 					ServletUtil.percentageGraph( (int)Double.parseDouble(percentUsed) , 100) +
 					"<td align=\"right\" class=\"pcremaining`\">" + percentRemaining +
 					"<td title=" + "\"blocks scheduled : " + d.getBlocksScheduled() +
 					"\" class=\"blocks\">" + d.numBlocks() + "\n");
 }


 public void generateDFSNodesList(JspWriter out,
 		NameNode nn,
 		HttpServletRequest request)
 throws IOException {
 	ArrayList<DatanodeDescriptor> live = new ArrayList<DatanodeDescriptor>();
 	ArrayList<DatanodeDescriptor> dead = new ArrayList<DatanodeDescriptor>();
 	jspHelper.DFSNodesStatus(live, dead);

        //verify input for correctness
        String whatNodes = request.getParameter("whatNodes");// show only live or only dead nodes
        if (whatNodes == null || whatNodes.length() == 0) {
          out.print("Invalid input");
          return;
        }

 	sorterField = request.getParameter("sorter/field");
 	sorterOrder = request.getParameter("sorter/order");
 	if ( sorterField == null )
 		sorterField = "name";
 	if ( sorterOrder == null )
 		sorterOrder = "ASC";

 	jspHelper.sortNodeList(live, sorterField, sorterOrder);
 	jspHelper.sortNodeList(dead, "name", "ASC");

 	// Find out common suffix. Should this be before or after the sort?
 	String port_suffix = null;
 	if ( live.size() > 0 ) {
 		String name = live.get(0).getName();
 		int idx = name.indexOf(':');
 		if ( idx > 0 ) {
 			port_suffix = name.substring( idx );
 		}

 		for ( int i=1; port_suffix != null && i < live.size(); i++ ) {
 			if ( live.get(i).getName().endsWith( port_suffix ) == false ) {
 				port_suffix = null;
 				break;
 			}
 		}
 	}

 	counterReset();

 	try {
 		Thread.sleep(1000);
 	} catch (InterruptedException e) {}

 	if (live.isEmpty() && dead.isEmpty()) {
 		out.print("There are no datanodes in the cluster");
 	}
 	else {

 		int nnHttpPort = nn.getHttpAddress().getPort();
 		out.print( "<div id=\"dfsnodetable\"> ");
 		if(whatNodes.equals("LIVE")) {

 			out.print(
 					"<a name=\"LiveNodes\" id=\"title\">" +
 					"Live Datanodes : " + live.size() + "</a>" +
 			"<br><br>\n<table border=1 cellspacing=0>\n" );

 			counterReset();

 			if ( live.size() > 0 ) {

 				if ( live.get(0).getCapacity() > 1024 * diskBytes ) {
 					diskBytes *= 1024;
 					diskByteStr = "TB";
 				}

 				out.print( "<tr class=\"headerRow\"> <th " +
 						NodeHeaderStr("name") + "> Node <th " +
 						NodeHeaderStr("lastcontact") + "> Last <br>Contact <th " +
 						NodeHeaderStr("adminstate") + "> Admin State <th " +
 						NodeHeaderStr("capacity") + "> Configured <br>Capacity (" +
 						diskByteStr + ") <th " +
 						NodeHeaderStr("used") + "> Used <br>(" +
 						diskByteStr + ") <th " +
 						NodeHeaderStr("nondfsused") + "> Non DFS <br>Used (" +
 						diskByteStr + ") <th " +
 						NodeHeaderStr("remaining") + "> Remaining <br>(" +
 						diskByteStr + ") <th " +
 						NodeHeaderStr("pcused") + "> Used <br>(%) <th " +
 						NodeHeaderStr("pcused") + "> Used <br>(%) <th " +
 						NodeHeaderStr("pcremaining") + "> Remaining <br>(%) <th " +
 						NodeHeaderStr("blocks") + "> Blocks\n" );

 				jspHelper.sortNodeList(live, sorterField, sorterOrder);
 				for ( int i=0; i < live.size(); i++ ) {
 					generateNodeData(out, live.get(i), port_suffix, true, nnHttpPort);
 				}
 			}
 			out.print("</table>\n");
 		} else if (whatNodes.equals("DEAD")) {

 			out.print("<br> <a name=\"DeadNodes\" id=\"title\"> " +
 					" Dead Datanodes : " +dead.size() + "</a><br><br>\n");

 			if ( dead.size() > 0 ) {
 				out.print( "<table border=1 cellspacing=0> <tr id=\"row1\"> " +
 				"<td> Node \n" );

 				jspHelper.sortNodeList(dead, "name", "ASC");
 				for ( int i=0; i < dead.size() ; i++ ) {
 					generateNodeData(out, dead.get(i), port_suffix, false, nnHttpPort);
 				}

 				out.print("</table>\n");
 			}
 		} else if (whatNodes.equals("DECOMMISSIONING")) {
 			// Decommissioning Nodes
 			ArrayList<DatanodeDescriptor> decommissioning = nn.getNamesystem()
 			    .getDecommissioningNodes();
 			out.print("<br> <a name=\"DecommissioningNodes\" id=\"title\"> "
 			    + " Decommissioning Datanodes : " + decommissioning.size()
                             + "</a><br><br>\n");
 	                if (decommissioning.size() > 0) {
                           out.print("<table border=1 cellspacing=0> <tr class=\"headRow\"> "
                               + "<th " + NodeHeaderStr("name")
                               + "> Node <th " + NodeHeaderStr("lastcontact")
                               + "> Last <br>Contact <th "
                               + NodeHeaderStr("underreplicatedblocks")
                               + "> Under Replicated Blocks <th "
                               + NodeHeaderStr("blockswithonlydecommissioningreplicas")
 		              + "> Blocks With No <br> Live Replicas <th "
 	                      + NodeHeaderStr("underrepblocksinfilesunderconstruction")
 	                      + "> Under Replicated Blocks <br> In Files Under Construction"
 	                      + " <th " + NodeHeaderStr("timesincedecommissionrequest")
 	                      + "> Time Since Decommissioning Started"
                           );
                           jspHelper.sortNodeList(decommissioning, "name", "ASC");
                           for (int i = 0; i < decommissioning.size(); i++) {
                             generateDecommissioningNodeData(out, decommissioning.get(i),
                                 port_suffix, true, nnHttpPort);
                           }
                           out.print("</table>\n");
                         }
                         out.print("</div>");
                   } else {
                     // if nothing matches then print invalid input
                     out.println("Invalid input");
                   }
 	}
 }%>

 <%
 NameNode nn = (NameNode)application.getAttribute("name.node");
 FSNamesystem fsn = nn.getNamesystem();
 String namenodeLabel = nn.getNameNodeAddress().getHostName() + ":" + nn.getNameNodeAddress().getPort();
 %>

 <html>

 <link rel="stylesheet" type="text/css" href="/static/hadoop.css">
 <title>Hadoop NameNode <%=namenodeLabel%></title>

 <body>
 <h1>NameNode '<%=namenodeLabel%>'</h1>


 <div id="dfstable"> <table>
 <tr> <td id="col1"> Started: <td> <%= fsn.getStartTime()%>
 <tr> <td id="col1"> Version: <td> <%= VersionInfo.getVersion()%>, r<%= VersionInfo.getRevision()%>
 <tr> <td id="col1"> Compiled: <td> <%= VersionInfo.getDate()%> by <%= VersionInfo.getUser()%>
 <tr> <td id="col1"> Upgrades: <td> <%= jspHelper.getUpgradeStatusText()%>
 </table></div><br>

 <b><a href="/nn_browsedfscontent.jsp">Browse the filesystem</a></b><br>
 <b><a href="/logs/">Namenode Logs</a></b><br>
 <b><a href=/dfshealth.jsp> Go back to DFS home</a></b>
 <hr>
 <%
 	generateDFSNodesList(out, nn, request);
 %>

 <%
 out.println(ServletUtil.htmlFooter());
 %>
	<%@ page
	contentType="text/html; charset=UTF-8"
	import="javax.servlet.*"
	import="javax.servlet.http.*"
	import="java.io.*"
	import="java.util.*"
	import="org.apache.hadoop.fs.*"
	import="org.apache.hadoop.hdfs.*"
	import="org.apache.hadoop.hdfs.server.common.*"
	import="org.apache.hadoop.hdfs.server.namenode.*"
	import="org.apache.hadoop.hdfs.server.datanode.*"
	import="org.apache.hadoop.hdfs.protocol.*"
	import="org.apache.hadoop.util.*"
	import="java.text.DateFormat"
	import="java.lang.Math"
	import="java.net.URLEncoder"
	%>
	<%!
	JspHelper jspHelper = new JspHelper();

	int rowNum = 0;
	int colNum = 0;

	String rowTxt() { colNum = 0;
	return "<tr class=\"" + (((rowNum++)%2 == 0)? "rowNormal" : "rowAlt")
	+ "\"> "; }
	String colTxt() { return "<td id=\"col" + ++colNum + "\"> "; }
	void counterReset () { colNum = 0; rowNum = 0 ; }

	long diskBytes = 1024 * 1024 * 1024;
	String diskByteStr = "GB";

	String sorterField = null;
	String sorterOrder = null;
	String whatNodes = "LIVE";

	String NodeHeaderStr(String name) {
	String ret = "class=header";
	String order = "ASC";
	if ( name.equals( sorterField ) ) {
	ret += sorterOrder;
	if ( sorterOrder.equals("ASC") )
	order = "DSC";
	}
	ret += " onClick=\"window.document.location=" +
	"'/dfsnodelist.jsp?whatNodes="+whatNodes+"&sorter/field=" + name + "&sorter/order=" +
	order + "'\" title=\"sort on this column\"";

	return ret;
	}

	void generateDecommissioningNodeData(JspWriter out, DatanodeDescriptor d,
	String suffix, boolean alive, int nnHttpPort) throws IOException {
	String url = "http://" + d.getHostName() + ":" + d.getInfoPort()
	+ "/browseDirectory.jsp?namenodeInfoPort=" + nnHttpPort + "&dir="
	+ URLEncoder.encode("/", "UTF-8");

	String name = d.getHostName() + ":" + d.getPort();
	if (!name.matches("\\d+\\.\\d+.\\d+\\.\\d+.*"))
	name = name.replaceAll("\\.[^.:]*", "");
	int idx = (suffix != null && name.endsWith(suffix)) ? name
	.indexOf(suffix) : -1;

	out.print(rowTxt() + "<td class=\"name\"><a title=\"" + d.getHost() + ":"
	+ d.getPort() + "\" href=\"" + url + "\">"
	+ ((idx > 0) ? name.substring(0, idx) : name) + "</a>"
	+ ((alive) ? "" : "\n"));
	if (!alive) {
	return;
	}

	long decommRequestTime = d.decommissioningStatus.getStartTime();
	long timestamp = d.getLastUpdate();
	long currentTime = System.currentTimeMillis();
	long hoursSinceDecommStarted = (currentTime - decommRequestTime)/3600000;
	long remainderMinutes = ((currentTime - decommRequestTime)/60000) % 60;
	out.print("<td class=\"lastcontact\"> "
	+ ((currentTime - timestamp) / 1000)
	+ "<td class=\"underreplicatedblocks\">"
	+ d.decommissioningStatus.getUnderReplicatedBlocks()
	+ "<td class=\"blockswithonlydecommissioningreplicas\">"
	+ d.decommissioningStatus.getDecommissionOnlyReplicas()
	+ "<td class=\"underrepblocksinfilesunderconstruction\">"
	+ d.decommissioningStatus.getUnderReplicatedInOpenFiles()
	+ "<td class=\"timesincedecommissionrequest\">"
	+ hoursSinceDecommStarted + " hrs " + remainderMinutes + " mins"
	+ "\n");
	}


	public void generateNodeData( JspWriter out, DatanodeDescriptor d,
	String suffix, boolean alive,
	int nnHttpPort )
	throws IOException {

	/* Say the datanode is dn1.hadoop.apache.org with ip 192.168.0.5
	we use:
	1) d.getHostName():d.getPort() to display.
	Domain and port are stripped if they are common across the nodes.
	i.e. "dn1"
	2) d.getHost():d.Port() for "title".
	i.e. "192.168.0.5:50010"
	3) d.getHostName():d.getInfoPort() for url.
	i.e. "http://dn1.hadoop.apache.org:50075/..."
	Note that "d.getHost():d.getPort()" is what DFS clients use
	to interact with datanodes.
	*/
	// from nn_browsedfscontent.jsp:
	String url = "http://" + d.getHostName() + ":" + d.getInfoPort() +
	"/browseDirectory.jsp?namenodeInfoPort=" +
	nnHttpPort + "&dir=" +
	URLEncoder.encode("/", "UTF-8");

	String name = d.getHostName() + ":" + d.getPort();
	if ( !name.matches( "\\d+\\.\\d+.\\d+\\.\\d+.*" ) )
	name = name.replaceAll( "\\.[^.:]*", "" );
	int idx = (suffix != null && name.endsWith( suffix )) ?
	name.indexOf( suffix ) : -1;

	out.print( rowTxt() + "<td class=\"name\"><a title=\""
	+ d.getHost() + ":" + d.getPort() +
	"\" href=\"" + url + "\">" +
	(( idx > 0 ) ? name.substring(0, idx) : name) + "</a>" +
	(( alive ) ? "" : "\n") );
	if ( !alive )
	return;

	long c = d.getCapacity();
	long u = d.getDfsUsed();
	long nu = d.getNonDfsUsed();
	long r = d.getRemaining();
	String percentUsed = StringUtils.limitDecimalTo2(d.getDfsUsedPercent());
	String percentRemaining = StringUtils.limitDecimalTo2(d.getRemainingPercent());

	String adminState = (d.isDecommissioned() ? "Decommissioned" :
	(d.isDecommissionInProgress() ? "Decommission In Progress":
	"In Service"));

	long timestamp = d.getLastUpdate();
	long currentTime = System.currentTimeMillis();
	out.print("<td class=\"lastcontact\"> " +
	((currentTime - timestamp)/1000) +
	"<td class=\"adminstate\">" +
	adminState +
	"<td align=\"right\" class=\"capacity\">" +
	StringUtils.limitDecimalTo2(c*1.0/diskBytes) +
	"<td align=\"right\" class=\"used\">" +
	StringUtils.limitDecimalTo2(u*1.0/diskBytes) +
	"<td align=\"right\" class=\"nondfsused\">" +
	StringUtils.limitDecimalTo2(nu*1.0/diskBytes) +
	"<td align=\"right\" class=\"remaining\">" +
	StringUtils.limitDecimalTo2(r*1.0/diskBytes) +
	"<td align=\"right\" class=\"pcused\">" + percentUsed +
	"<td class=\"pcused\">" +
	ServletUtil.percentageGraph( (int)Double.parseDouble(percentUsed) , 100) +
	"<td align=\"right\" class=\"pcremaining`\">" + percentRemaining +
	"<td title=" + "\"blocks scheduled : " + d.getBlocksScheduled() +
	"\" class=\"blocks\">" + d.numBlocks() + "\n");
	}



	public void generateDFSNodesList(JspWriter out,
	NameNode nn,
	HttpServletRequest request)
	throws IOException {
	ArrayList<DatanodeDescriptor> live = new ArrayList<DatanodeDescriptor>();
	ArrayList<DatanodeDescriptor> dead = new ArrayList<DatanodeDescriptor>();
	jspHelper.DFSNodesStatus(live, dead);

	//verify input for correctness
	String whatNodes = request.getParameter("whatNodes");// show only live or only dead nodes
	if (whatNodes == null \|\| whatNodes.length() == 0) {
	out.print("Invalid input");
	return;
	}

	sorterField = request.getParameter("sorter/field");
	sorterOrder = request.getParameter("sorter/order");
	if ( sorterField == null )
	sorterField = "name";
	if ( sorterOrder == null )
	sorterOrder = "ASC";

	jspHelper.sortNodeList(live, sorterField, sorterOrder);
	jspHelper.sortNodeList(dead, "name", "ASC");

	// Find out common suffix. Should this be before or after the sort?
	String port_suffix = null;
	if ( live.size() > 0 ) {
	String name = live.get(0).getName();
	int idx = name.indexOf(':');
	if ( idx > 0 ) {
	port_suffix = name.substring( idx );
	}

	for ( int i=1; port_suffix != null && i < live.size(); i++ ) {
	if ( live.get(i).getName().endsWith( port_suffix ) == false ) {
	port_suffix = null;
	break;
	}
	}
	}

	counterReset();

	try {
	Thread.sleep(1000);
	} catch (InterruptedException e) {}

	if (live.isEmpty() && dead.isEmpty()) {
	out.print("There are no datanodes in the cluster");
	}
	else {

	int nnHttpPort = nn.getHttpAddress().getPort();
	out.print( "<div id=\"dfsnodetable\"> ");
	if(whatNodes.equals("LIVE")) {

	out.print(
	"<a name=\"LiveNodes\" id=\"title\">" +
	"Live Datanodes : " + live.size() + "</a>" +
	"<br><br>\n<table border=1 cellspacing=0>\n" );

	counterReset();

	if ( live.size() > 0 ) {

	if ( live.get(0).getCapacity() > 1024 * diskBytes ) {
	diskBytes *= 1024;
	diskByteStr = "TB";
	}

	out.print( "<tr class=\"headerRow\"> <th " +
	NodeHeaderStr("name") + "> Node <th " +
	NodeHeaderStr("lastcontact") + "> Last <br>Contact <th " +
	NodeHeaderStr("adminstate") + "> Admin State <th " +
	NodeHeaderStr("capacity") + "> Configured <br>Capacity (" +
	diskByteStr + ") <th " +
	NodeHeaderStr("used") + "> Used <br>(" +
	diskByteStr + ") <th " +
	NodeHeaderStr("nondfsused") + "> Non DFS <br>Used (" +
	diskByteStr + ") <th " +
	NodeHeaderStr("remaining") + "> Remaining <br>(" +
	diskByteStr + ") <th " +
	NodeHeaderStr("pcused") + "> Used <br>(%) <th " +
	NodeHeaderStr("pcused") + "> Used <br>(%) <th " +
	NodeHeaderStr("pcremaining") + "> Remaining <br>(%) <th " +
	NodeHeaderStr("blocks") + "> Blocks\n" );

	jspHelper.sortNodeList(live, sorterField, sorterOrder);
	for ( int i=0; i < live.size(); i++ ) {
	generateNodeData(out, live.get(i), port_suffix, true, nnHttpPort);
	}
	}
	out.print("</table>\n");
	} else if (whatNodes.equals("DEAD")) {

	out.print("<br> <a name=\"DeadNodes\" id=\"title\"> " +
	" Dead Datanodes : " +dead.size() + "</a><br><br>\n");

	if ( dead.size() > 0 ) {
	out.print( "<table border=1 cellspacing=0> <tr id=\"row1\"> " +
	"<td> Node \n" );

	jspHelper.sortNodeList(dead, "name", "ASC");
	for ( int i=0; i < dead.size() ; i++ ) {
	generateNodeData(out, dead.get(i), port_suffix, false, nnHttpPort);
	}

	out.print("</table>\n");
	}
	} else if (whatNodes.equals("DECOMMISSIONING")) {
	// Decommissioning Nodes
	ArrayList<DatanodeDescriptor> decommissioning = nn.getNamesystem()
	.getDecommissioningNodes();
	out.print("<br> <a name=\"DecommissioningNodes\" id=\"title\"> "
	+ " Decommissioning Datanodes : " + decommissioning.size()
	+ "</a><br><br>\n");
	if (decommissioning.size() > 0) {
	out.print("<table border=1 cellspacing=0> <tr class=\"headRow\"> "
	+ "<th " + NodeHeaderStr("name")
	+ "> Node <th " + NodeHeaderStr("lastcontact")
	+ "> Last <br>Contact <th "
	+ NodeHeaderStr("underreplicatedblocks")
	+ "> Under Replicated Blocks <th "
	+ NodeHeaderStr("blockswithonlydecommissioningreplicas")
	+ "> Blocks With No <br> Live Replicas <th "
	+ NodeHeaderStr("underrepblocksinfilesunderconstruction")
	+ "> Under Replicated Blocks <br> In Files Under Construction"
	+ " <th " + NodeHeaderStr("timesincedecommissionrequest")
	+ "> Time Since Decommissioning Started"
	);
	jspHelper.sortNodeList(decommissioning, "name", "ASC");
	for (int i = 0; i < decommissioning.size(); i++) {
	generateDecommissioningNodeData(out, decommissioning.get(i),
	port_suffix, true, nnHttpPort);
	}
	out.print("</table>\n");
	}
	out.print("</div>");
	} else {
	// if nothing matches then print invalid input
	out.println("Invalid input");
	}
	}
	}%>

	<%
	NameNode nn = (NameNode)application.getAttribute("name.node");
	FSNamesystem fsn = nn.getNamesystem();
	String namenodeLabel = nn.getNameNodeAddress().getHostName() + ":" + nn.getNameNodeAddress().getPort();
	%>

	<html>

	<link rel="stylesheet" type="text/css" href="/static/hadoop.css">
	<title>Hadoop NameNode <%=namenodeLabel%></title>

	<body>
	<h1>NameNode '<%=namenodeLabel%>'</h1>


	<div id="dfstable"> <table>
	<tr> <td id="col1"> Started: <td> <%= fsn.getStartTime()%>
	<tr> <td id="col1"> Version: <td> <%= VersionInfo.getVersion()%>, r<%= VersionInfo.getRevision()%>
	<tr> <td id="col1"> Compiled: <td> <%= VersionInfo.getDate()%> by <%= VersionInfo.getUser()%>
	<tr> <td id="col1"> Upgrades: <td> <%= jspHelper.getUpgradeStatusText()%>
	</table></div><br>

	<b><a href="/nn_browsedfscontent.jsp">Browse the filesystem</a></b><br>
	<b><a href="/logs/">Namenode Logs</a></b><br>
	<b><a href=/dfshealth.jsp> Go back to DFS home</a></b>
	<hr>
	<%
	generateDFSNodesList(out, nn, request);
	%>

	<%
	out.println(ServletUtil.htmlFooter());
	%>