org.apache.hadoop.mapreduce

Enum TaskCompletionEvent.Status

java.lang.Object

java.lang.Enum<TaskCompletionEvent.Status>

org.apache.hadoop.mapreduce.TaskCompletionEvent.Status

All Implemented Interfaces:

Serializable, Comparable<TaskCompletionEvent.Status>

Enclosing class:

TaskCompletionEvent

@InterfaceAudience.Public
 @InterfaceStability.Evolving
public static enum TaskCompletionEvent.Status
extends Enum<TaskCompletionEvent.Status>

Enum Constant Summary

Enum Constants

Enum Constant and Description
FAILED Task Event Attempt failed but there are attempts remaining.
KILLED Task Event was killed.
OBSOLETE Used to Override a previously successful event status.
SUCCEEDED Task Event was successful.
TIPFAILED Task Event attempt failed and no further attempts exist.

Method Summary

Modifier and Type	Method and Description
static TaskCompletionEvent.Status	valueOf(String name) Returns the enum constant of this type with the specified name.
static TaskCompletionEvent.Status[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

FAILED

public static final TaskCompletionEvent.Status FAILED

Task Event Attempt failed but there are attempts remaining.

KILLED

public static final TaskCompletionEvent.Status KILLED

Task Event was killed.

SUCCEEDED

public static final TaskCompletionEvent.Status SUCCEEDED

Task Event was successful.

OBSOLETE

public static final TaskCompletionEvent.Status OBSOLETE

Used to Override a previously successful event status. Example: Map attempt runs and a SUCCEEDED event is sent. Later a task is retroactively failed due to excessive fetch failure during shuffle phase. When the retroactive attempt failure occurs, an OBSOLETE event is sent for the map attempt indicating the prior event is no longer valid.

TIPFAILED

public static final TaskCompletionEvent.Status TIPFAILED

Task Event attempt failed and no further attempts exist. reached MAX attempts. When a reducer receives a TIPFAILED event it gives up trying to shuffle data from that map task.

Method Detail

values

public static TaskCompletionEvent.Status[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (TaskCompletionEvent.Status c : TaskCompletionEvent.Status.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static TaskCompletionEvent.Status valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null