org.apache.flink.runtime.taskmanager

Class TaskExecutionState

java.lang.Object

org.apache.flink.runtime.taskmanager.TaskExecutionState

All Implemented Interfaces:

Serializable

public class TaskExecutionState
extends Object
implements Serializable

This class represents an update about a task's execution state.

NOTE: The exception that may be attached to the state update is not necessarily a Flink or core Java exception, but may be an exception from the user code. As such, it cannot be deserialized without a special class loader. For that reason, the class keeps the actual exception field transient and deserialized it lazily, with the appropriate class loader.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
TaskExecutionState(ExecutionAttemptID executionId, ExecutionState executionState) Creates a new task execution state update, with no attached exception and no accumulators.
TaskExecutionState(ExecutionAttemptID executionId, ExecutionState executionState, Throwable error) Creates a new task execution state update, with an attached exception but no accumulators.
TaskExecutionState(ExecutionAttemptID executionId, ExecutionState executionState, Throwable error, AccumulatorSnapshot accumulators, IOMetrics ioMetrics) Creates a new task execution state update, with an attached exception.

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object obj)
AccumulatorSnapshot	getAccumulators() Gets flink and user-defined accumulators in serialized form.
Throwable	getError(ClassLoader userCodeClassloader) Gets the attached exception, which is in serialized form.
ExecutionState	getExecutionState() Returns the new execution state of the task.
ExecutionAttemptID	getID() Returns the ID of the task this result belongs to
IOMetrics	getIOMetrics()
int	hashCode()
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

TaskExecutionState

public TaskExecutionState(ExecutionAttemptID executionId,
                          ExecutionState executionState)

Creates a new task execution state update, with no attached exception and no accumulators.

Parameters:

executionId - the ID of the task execution whose state is to be reported

executionState - the execution state to be reported

TaskExecutionState

public TaskExecutionState(ExecutionAttemptID executionId,
                          ExecutionState executionState,
                          Throwable error)

Creates a new task execution state update, with an attached exception but no accumulators.

Parameters:

executionId - the ID of the task execution whose state is to be reported

executionState - the execution state to be reported

TaskExecutionState

public TaskExecutionState(ExecutionAttemptID executionId,
                          ExecutionState executionState,
                          Throwable error,
                          AccumulatorSnapshot accumulators,
                          IOMetrics ioMetrics)

Creates a new task execution state update, with an attached exception. This constructor may never throw an exception.

Parameters:

executionId - the ID of the task execution whose state is to be reported

executionState - the execution state to be reported

error - an optional error

accumulators - The flink and user-defined accumulators which may be null.

Method Detail

getError

public Throwable getError(ClassLoader userCodeClassloader)

Gets the attached exception, which is in serialized form. Returns null, if the status update is no failure with an associated exception.

Parameters:

userCodeClassloader - The classloader that can resolve user-defined exceptions.

Returns:

The attached exception, or null, if none.

getID

public ExecutionAttemptID getID()

Returns the ID of the task this result belongs to

Returns:

the ID of the task this result belongs to

getExecutionState

public ExecutionState getExecutionState()

Returns the new execution state of the task.

Returns:

the new execution state of the task

getAccumulators

public AccumulatorSnapshot getAccumulators()

Gets flink and user-defined accumulators in serialized form.

getIOMetrics

public IOMetrics getIOMetrics()

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object