org.apache.hadoop.mapred

类 JobHistory.MapAttempt

java.lang.Object

org.apache.hadoop.mapred.JobHistory.Task

org.apache.hadoop.mapred.JobHistory.TaskAttempt

org.apache.hadoop.mapred.JobHistory.MapAttempt

封闭类:

JobHistory

public static class JobHistory.MapAttempt
extends JobHistory.TaskAttempt

Helper class for logging or reading back events related to start, finish or failure of a Map Attempt on a node.

构造器概要

构造器

构造器和说明
JobHistory.MapAttempt()

方法概要

方法

限定符和类型	方法和说明
String	get(JobHistory.Keys k) Get 'String' value for given key.
int	getInt(JobHistory.Keys k) Convert value from history to int and return.
long	getLong(JobHistory.Keys k) Convert value from history to int and return.
Map<JobHistory.Keys,String>	getValues() Returns Map containing all key-values.
void	handle(Map<JobHistory.Keys,String> values) Reads values back from the history, input is same Map as passed to Listener by parseHistory().
static void	logFailed(TaskAttemptID taskAttemptId, long timestamp, String hostName, String error) 已过时。 Use logFailed(TaskAttemptID, long, String, String, String)
static void	logFailed(TaskAttemptID taskAttemptId, long timestamp, String hostName, String error, String taskType) Log task attempt failed event.
static void	logFinished(TaskAttemptID taskAttemptId, long finishTime, String hostName) 已过时。 Use logFinished(TaskAttemptID, long, String, String, String, Counters)
static void	logFinished(TaskAttemptID taskAttemptId, long finishTime, String hostName, String taskType, String stateString, Counters counter) Log finish time of map task attempt.
static void	logKilled(TaskAttemptID taskAttemptId, long timestamp, String hostName, String error) 已过时。 Use logKilled(TaskAttemptID, long, String, String, String)
static void	logKilled(TaskAttemptID taskAttemptId, long timestamp, String hostName, String error, String taskType) Log task attempt killed event.
static void	logStarted(TaskAttemptID taskAttemptId, long startTime, String hostName) 已过时。 Use logStarted(TaskAttemptID, long, String, int, String)
static void	logStarted(TaskAttemptID taskAttemptId, long startTime, String trackerName, int httpPort, String taskType) 已过时。
static void	logStarted(TaskAttemptID taskAttemptId, long startTime, String trackerName, int httpPort, String taskType, org.apache.hadoop.mapred.Locality locality, org.apache.hadoop.mapred.Avataar avataar) Log start time of this map task attempt.
void	set(JobHistory.Keys k, String s) Set value for the key.
void	set(Map<JobHistory.Keys,String> m) Adds all values in the Map argument to its own values.

从类继承的方法 org.apache.hadoop.mapred.JobHistory.Task

getTaskAttempts, logFailed, logFailed, logFinished, logStarted, logUpdates

从类继承的方法 java.lang.Object

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

构造器详细资料

JobHistory.MapAttempt

public JobHistory.MapAttempt()

方法详细资料

logStarted

@Deprecated
public static void logStarted(TaskAttemptID taskAttemptId,
                         long startTime,
                         String hostName)

已过时。 Use logStarted(TaskAttemptID, long, String, int, String)

Log start time of this map task attempt.

参数:

taskAttemptId - task attempt id

startTime - start time of task attempt as reported by task tracker.

hostName - host name of the task attempt.

logStarted

@Deprecated
public static void logStarted(TaskAttemptID taskAttemptId,
                         long startTime,
                         String trackerName,
                         int httpPort,
                         String taskType)

已过时。

logStarted

public static void logStarted(TaskAttemptID taskAttemptId,
              long startTime,
              String trackerName,
              int httpPort,
              String taskType,
              org.apache.hadoop.mapred.Locality locality,
              org.apache.hadoop.mapred.Avataar avataar)

Log start time of this map task attempt.

参数:

taskAttemptId - task attempt id

startTime - start time of task attempt as reported by task tracker.

trackerName - name of the tracker executing the task attempt.

httpPort - http port of the task tracker executing the task attempt

taskType - Whether the attempt is cleanup or setup or map

locality - the data locality of the task attempt

Avataar - the avataar of the task attempt

logFinished

@Deprecated
public static void logFinished(TaskAttemptID taskAttemptId,
                          long finishTime,
                          String hostName)

已过时。 Use logFinished(TaskAttemptID, long, String, String, String, Counters)

Log finish time of map task attempt.

参数:

taskAttemptId - task attempt id

finishTime - finish time

hostName - host name

logFinished

public static void logFinished(TaskAttemptID taskAttemptId,
               long finishTime,
               String hostName,
               String taskType,
               String stateString,
               Counters counter)

Log finish time of map task attempt.

参数:

taskAttemptId - task attempt id

finishTime - finish time

hostName - host name

taskType - Whether the attempt is cleanup or setup or map

stateString - state string of the task attempt

counter - counters of the task attempt

logFailed

@Deprecated
public static void logFailed(TaskAttemptID taskAttemptId,
                        long timestamp,
                        String hostName,
                        String error)

已过时。 Use logFailed(TaskAttemptID, long, String, String, String)

Log task attempt failed event.

参数:

taskAttemptId - task attempt id

timestamp - timestamp

hostName - hostname of this task attempt.

error - error message if any for this task attempt.

logFailed

public static void logFailed(TaskAttemptID taskAttemptId,
             long timestamp,
             String hostName,
             String error,
             String taskType)

Log task attempt failed event.

参数:

taskAttemptId - task attempt id

timestamp - timestamp

hostName - hostname of this task attempt.

error - error message if any for this task attempt.

taskType - Whether the attempt is cleanup or setup or map

logKilled

@Deprecated
public static void logKilled(TaskAttemptID taskAttemptId,
                        long timestamp,
                        String hostName,
                        String error)

已过时。 Use logKilled(TaskAttemptID, long, String, String, String)

Log task attempt killed event.

参数:

taskAttemptId - task attempt id

timestamp - timestamp

hostName - hostname of this task attempt.

error - error message if any for this task attempt.

logKilled

public static void logKilled(TaskAttemptID taskAttemptId,
             long timestamp,
             String hostName,
             String error,
             String taskType)

Log task attempt killed event.

参数:

taskAttemptId - task attempt id

timestamp - timestamp

hostName - hostname of this task attempt.

error - error message if any for this task attempt.

taskType - Whether the attempt is cleanup or setup or map

get

public String get(JobHistory.Keys k)

Get 'String' value for given key. Most of the places use Strings as values so the default get' method returns 'String'. This method never returns null to ease on GUIs. if no value is found it returns empty string ""

参数:

k -

返回:

if null it returns empty string - ""

getInt

public int getInt(JobHistory.Keys k)

Convert value from history to int and return. if no value is found it returns 0.

参数:

k - key

getLong

public long getLong(JobHistory.Keys k)

Convert value from history to int and return. if no value is found it returns 0.

参数:

k -

set

public void set(JobHistory.Keys k,
       String s)

Set value for the key.

参数:

k -

s -

set

public void set(Map<JobHistory.Keys,String> m)

Adds all values in the Map argument to its own values.

参数:

m -

handle

public void handle(Map<JobHistory.Keys,String> values)

Reads values back from the history, input is same Map as passed to Listener by parseHistory().

参数:

values -

getValues

public Map<JobHistory.Keys,String> getValues()

Returns Map containing all key-values.