%@ page
contentType="text/html; charset=UTF-8"
import="javax.servlet.*"
import="javax.servlet.http.*"
import="java.io.*"
import="java.util.*"
import="org.apache.hadoop.mapred.*"
import="org.apache.hadoop.util.*"
%>
<%!
JobTracker tracker = JobTracker.getTracker();
String trackerName =
StringUtils.simpleHostname(tracker.getJobTrackerMachine());
private void printFailedAttempts(JspWriter out,
String jobId,
TaskInProgress tip,
TaskStatus.State failState) throws IOException {
TaskStatus[] statuses = tip.getTaskStatuses();
String 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.getTaskTracker(taskTrackerName);
out.print("
" + statuses[i].getTaskId() +
" | " + tipId +
" | ");
if (taskTracker == null) {
out.print("" + taskTrackerName + " | ");
} else {
out.print("" + taskTracker.getHost() +
" | ");
}
out.print("" + taskState + " | ");
out.print("");
List failures =
tracker.getTaskDiagnostics(jobId, tipId,
statuses[i].getTaskId());
if (failures == null) {
out.print(" ");
} else {
for(Iterator itr = failures.iterator(); itr.hasNext(); ) {
out.print(itr.next());
if (itr.hasNext()) {
out.print("\n-------\n");
}
}
}
out.print(" | ");
out.print("");
if (taskTracker != null) {
String taskLogUrl = "http://" + taskTracker.getHost() + ":" +
taskTracker.getHttpPort() + "/tasklog.jsp?taskid=" +
statuses[i].getTaskId();
String tailFourKBUrl = taskLogUrl + "&tail=true&tailsize=4096";
String tailEightKBUrl = taskLogUrl + "&tail=true&tailsize=8192";
String entireLogUrl = taskLogUrl + "&all=true";
out.print("Last 4KB ");
out.print("Last 8KB ");
out.print("All ");
} else {
out.print("n/a"); // task tracker was lost
}
out.print(" | ");
out.print("
\n");
}
}
}
private void printFailures(JspWriter out,
String jobId,
String kind,
String cause) throws IOException {
JobInProgress job = (JobInProgress) tracker.getJob(jobId);
if (job == null) {
out.print("Job " + jobId + " not found.
\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("Kind " + kind + " not supported.
\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("Cause '" + cause +
"' is not an 'unsuccessful' state.
\n");
return;
}
}
} catch (IllegalArgumentException e) {
out.print("Cause " + cause + " not supported.
\n");
return;
}
out.print("");
out.print("Attempt | Task | Machine | State | " +
"Error | Logs |
\n");
if (includeMap) {
TaskInProgress[] tips = job.getMapTasks();
for(int i=0; i < tips.length; ++i) {
printFailedAttempts(out, jobId, tips[i], state);
}
}
if (includeReduce) {
TaskInProgress[] tips = job.getReduceTasks();
for(int i=0; i < tips.length; ++i) {
printFailedAttempts(out, jobId, tips[i], state);
}
}
out.print("
\n");
}
%>
<%
String jobId = request.getParameter("jobid");
String kind = request.getParameter("kind");
String cause = request.getParameter("cause");
%>
Hadoop <%=jobId%> failures on <%=trackerName%>
<%
printFailures(out, jobId, kind, cause);
%>
Go back to JobTracker
Hadoop, 2006.