org.apache.hadoop.mapred

Class TaskLogServlet

java.lang.Object

javax.servlet.GenericServlet

javax.servlet.http.HttpServlet

org.apache.hadoop.mapred.TaskLogServlet

All Implemented Interfaces:

Serializable, javax.servlet.Servlet, javax.servlet.ServletConfig

public class TaskLogServlet
extends javax.servlet.http.HttpServlet

A servlet that is run by the TaskTrackers to provide the task logs via http.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
TaskLogServlet()

Method Summary

Methods

Modifier and Type	Method and Description
void	doGet(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) Get the logs via http.
static String	getTaskLogUrl(String taskTrackerHostName, String httpPort, String taskAttemptID) Construct the taskLogUrl
static String	getTaskLogUrl(TaskTrackerStatus status, String taskAttemptID) Construct the taskLogUrl

Methods inherited from class javax.servlet.http.HttpServlet

doDelete, doHead, doOptions, doPost, doPut, doTrace, getLastModified, service, service

Methods inherited from class javax.servlet.GenericServlet

destroy, getInitParameter, getInitParameterNames, getServletConfig, getServletContext, getServletInfo, getServletName, init, init, log, log

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

TaskLogServlet

public TaskLogServlet()

Method Detail

getTaskLogUrl

public static String getTaskLogUrl(String taskTrackerHostName,
                   String httpPort,
                   String taskAttemptID)

Construct the taskLogUrl

Parameters:

taskTrackerHostName -

httpPort -

taskAttemptID -

Returns:

the taskLogUrl

getTaskLogUrl

public static String getTaskLogUrl(TaskTrackerStatus status,
                   String taskAttemptID)

Construct the taskLogUrl

Parameters:

status -

taskAttemptID -

Returns:

the taskLogUrl

doGet

public void doGet(javax.servlet.http.HttpServletRequest request,
         javax.servlet.http.HttpServletResponse response)
           throws javax.servlet.ServletException,
                  IOException

Get the logs via http.

Overrides:

doGet in class javax.servlet.http.HttpServlet

Throws:

javax.servlet.ServletException

IOException