Package org.a2aproject.sdk.spec

Class TaskNotFoundError

java.lang.Object

java.lang.Throwable

java.lang.Exception

java.lang.RuntimeException

org.a2aproject.sdk.spec.A2AError

org.a2aproject.sdk.spec.A2AProtocolError

org.a2aproject.sdk.spec.TaskNotFoundError

All Implemented Interfaces:

Serializable, Event

public class TaskNotFoundError
extends A2AProtocolError

A2A Protocol error indicating that the requested task ID does not exist.

This error is returned when a client attempts to perform operations on a task using a task ID that is not found in the server's task store.

Common causes:

• Task ID was never created
• Task has been removed from the task store (expired or deleted)
• Task ID typo or incorrect value
• Task belongs to a different agent or server instance

Corresponds to A2A-specific error code -32001.

Usage example:

 Task task = taskStore.getTask(taskId);
 if (task == null) {
     throw new TaskNotFoundError();
 }
 

See Also:

• for task object definition
• A2A Protocol Specification
• Serialized Form

Constructor Summary

Constructors

Constructor	Description
TaskNotFoundError()	Constructs error with default message.
TaskNotFoundError(@Nullable String message, @Nullable Map<String,Object> details)	Constructs error with all parameters.

Method Summary

Methods inherited from class org.a2aproject.sdk.spec.A2AError

getCode, getDetails

Methods inherited from class java.lang.Throwable

addSuppressed, fillInStackTrace, getCause, getLocalizedMessage, getMessage, getStackTrace, getSuppressed, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString

Methods inherited from class java.lang.Object

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

Constructor Details

TaskNotFoundError

public TaskNotFoundError()

Constructs error with default message.

TaskNotFoundError

public TaskNotFoundError(@Nullable String message,
 @Nullable Map<String,Object> details)

Constructs error with all parameters.

Parameters:

message - the error message (defaults to "Task not found" if null)

details - additional error details (optional)