📄 machines.jsp
字号:
<%@ page contentType="text/html; charset=UTF-8" import="javax.servlet.*" import="javax.servlet.http.*" import="java.io.*" import="java.util.*" import="java.text.DecimalFormat" import="org.apache.hadoop.mapred.*" import="org.apache.hadoop.util.*"%><%! JobTracker tracker = JobTracker.getTracker(); String trackerLabel = StringUtils.simpleHostname(tracker.getJobTrackerMachine()); public void generateTaskTrackerTable(JspWriter out) throws IOException { Collection c = tracker.taskTrackers(); if (c.size() == 0) { out.print("There are currently no known TaskTracker(s)."); } else { out.print("<center>\n"); out.print("<table border=\"2\" cellpadding=\"5\" cellspacing=\"2\">\n"); out.print("<tr><td align=\"center\" colspan=\"5\"><b>Task Trackers</b></td></tr>\n"); out.print("<tr><td><b>Name</b></td><td><b>Host</b></td>" + "<td><b># running tasks</b></td><td><b>Failures</b></td>" + "<td><b>Secs since heartbeat</b></td></tr>\n"); int maxFailures = 0; String failureKing = null; for (Iterator it = c.iterator(); it.hasNext(); ) { TaskTrackerStatus tt = (TaskTrackerStatus) it.next(); long sinceHeartbeat = System.currentTimeMillis() - tt.getLastSeen(); if (sinceHeartbeat > 0) { sinceHeartbeat = sinceHeartbeat / 1000; } int numCurTasks = 0; for (Iterator it2 = tt.taskReports(); it2.hasNext(); ) { it2.next(); numCurTasks++; } int numFailures = tt.getFailures(); if (numFailures > maxFailures) { maxFailures = numFailures; failureKing = tt.getTrackerName(); } out.print("<tr><td><a href=\"http://"); out.print(tt.getHost() + ":" + tt.getHttpPort() + "/\">"); out.print(tt.getTrackerName() + "</a></td><td>"); out.print(tt.getHost() + "</td><td>" + numCurTasks + "</td><td>" + numFailures + "</td><td>" + sinceHeartbeat + "</td></tr>\n"); } out.print("</table>\n"); out.print("</center>\n"); if (maxFailures > 0) { out.print("Highest Failures: " + failureKing + " with " + maxFailures + " failures<br>\n"); } } }%><html><title><%=trackerLabel%> Hadoop Machine List</title><body><h1><a href="/jobtracker.jsp"><%=trackerLabel%></a> Hadoop Machine List</h1><h2>Task Trackers</h2><% generateTaskTrackerTable(out);%><hr><a href="http://lucene.apache.org/hadoop">Hadoop</a>, 2006.<br></body></html>⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -