org.apache.hadoop.mapred

Class JobHistory.ReduceAttempt

java.lang.Object

org.apache.hadoop.mapred.JobHistory.Task

org.apache.hadoop.mapred.JobHistory.TaskAttempt

org.apache.hadoop.mapred.JobHistory.ReduceAttempt

Enclosing class:

JobHistory

public static class JobHistory.ReduceAttempt
extends JobHistory.TaskAttempt

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

Constructor Summary

Constructors

Constructor and Description
JobHistory.ReduceAttempt()

Method Summary

Methods

Modifier and Type	Method and Description
java.lang.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.
java.util.Map<JobHistory.Keys,java.lang.String>	getValues() Returns Map containing all key-values.
void	handle(java.util.Map<JobHistory.Keys,java.lang.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, java.lang.String hostName, java.lang.String error) Deprecated. Use logFailed(TaskAttemptID, long, String, String, String)
static void	logFailed(TaskAttemptID taskAttemptId, long timestamp, java.lang.String hostName, java.lang.String error, java.lang.String taskType) Log failed reduce task attempt.
static void	logFinished(TaskAttemptID taskAttemptId, long shuffleFinished, long sortFinished, long finishTime, java.lang.String hostName) Deprecated. Use logFinished(TaskAttemptID, long, long, long, String, String, String, Counters)
static void	logFinished(TaskAttemptID taskAttemptId, long shuffleFinished, long sortFinished, long finishTime, java.lang.String hostName, java.lang.String taskType, java.lang.String stateString, Counters counter) Log finished event of this task.
static void	logKilled(TaskAttemptID taskAttemptId, long timestamp, java.lang.String hostName, java.lang.String error) Deprecated. Use logKilled(TaskAttemptID, long, String, String, String)
static void	logKilled(TaskAttemptID taskAttemptId, long timestamp, java.lang.String hostName, java.lang.String error, java.lang.String taskType) Log killed reduce task attempt.
static void	logStarted(TaskAttemptID taskAttemptId, long startTime, java.lang.String hostName) Deprecated. Use logStarted(TaskAttemptID, long, String, int, String)
static void	logStarted(TaskAttemptID taskAttemptId, long startTime, java.lang.String trackerName, int httpPort, java.lang.String taskType) Log start time of Reduce task attempt.
void	set(JobHistory.Keys k, java.lang.String s) Set value for the key.
void	set(java.util.Map<JobHistory.Keys,java.lang.String> m) Adds all values in the Map argument to its own values.

Methods inherited from class org.apache.hadoop.mapred.JobHistory.Task

getTaskAttempts, logFailed, logFailed, logFinished, logStarted, logUpdates

Methods inherited from class java.lang.Object

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

Constructor Detail

JobHistory.ReduceAttempt

public JobHistory.ReduceAttempt()

Method Detail

logStarted

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

Deprecated. Use logStarted(TaskAttemptID, long, String, int, String)

Log start time of Reduce task attempt.

Parameters:

taskAttemptId - task attempt id

startTime - start time

hostName - host name

logStarted

public static void logStarted(TaskAttemptID taskAttemptId,
              long startTime,
              java.lang.String trackerName,
              int httpPort,
              java.lang.String taskType)

Log start time of Reduce task attempt.

Parameters:

taskAttemptId - task attempt id

startTime - start time

trackerName - tracker name

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

taskType - Whether the attempt is cleanup or setup or reduce

logFinished

@Deprecated
public static void logFinished(TaskAttemptID taskAttemptId,
                          long shuffleFinished,
                          long sortFinished,
                          long finishTime,
                          java.lang.String hostName)

Deprecated. Use logFinished(TaskAttemptID, long, long, long, String, String, String, Counters)

Log finished event of this task.

Parameters:

taskAttemptId - task attempt id

shuffleFinished - shuffle finish time

sortFinished - sort finish time

finishTime - finish time of task

hostName - host name where task attempt executed

logFinished

public static void logFinished(TaskAttemptID taskAttemptId,
               long shuffleFinished,
               long sortFinished,
               long finishTime,
               java.lang.String hostName,
               java.lang.String taskType,
               java.lang.String stateString,
               Counters counter)

Log finished event of this task.

Parameters:

taskAttemptId - task attempt id

shuffleFinished - shuffle finish time

sortFinished - sort finish time

finishTime - finish time of task

hostName - host name where task attempt executed

taskType - Whether the attempt is cleanup or setup or reduce

stateString - the state string of the attempt

counter - counters of the attempt

logFailed

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

Deprecated. Use logFailed(TaskAttemptID, long, String, String, String)

Log failed reduce task attempt.

Parameters:

taskAttemptId - task attempt id

timestamp - time stamp when task failed

hostName - host name of the task attempt.

error - error message of the task.

logFailed

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

Log failed reduce task attempt.

Parameters:

taskAttemptId - task attempt id

timestamp - time stamp when task failed

hostName - host name of the task attempt.

error - error message of the task.

taskType - Whether the attempt is cleanup or setup or reduce

logKilled

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

Deprecated. Use logKilled(TaskAttemptID, long, String, String, String)

Log killed reduce task attempt.

Parameters:

taskAttemptId - task attempt id

timestamp - time stamp when task failed

hostName - host name of the task attempt.

error - error message of the task.

logKilled

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

Log killed reduce task attempt.

Parameters:

taskAttemptId - task attempt id

timestamp - time stamp when task failed

hostName - host name of the task attempt.

error - error message of the task.

taskType - Whether the attempt is cleanup or setup or reduce

get

public java.lang.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 ""

Parameters:

k -

Returns:

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.

Parameters:

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.

Parameters:

k -

set

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

Set value for the key.

Parameters:

k -

s -

set

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

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

Parameters:

m -

handle

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

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

Parameters:

values -

getValues

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

Returns Map containing all key-values.