Request Syntax URI Request Parameters Request Body Response Syntax Response Elements Errors See Also

StopExperiment

Important

End of support notice: On October 16, 2025, AWS will discontinue support for CloudWatch Evidently. After October 16, 2025, you will no longer be able to access the Evidently console or CloudWatch Evidently resources.

Stops an experiment that is currently running. If you stop an experiment, you can't resume it or restart it.

Request Syntax


POST /projects/project/experiments/experiment/cancel HTTP/1.1
Content-type: application/json

{
   "desiredState": "string",
   "reason": "string"
}

URI Request Parameters

The request uses the following URI parameters.

experiment

The name of the experiment to stop.

Length Constraints: Minimum length of 1. Maximum length of 127.

Pattern: ^[-a-zA-Z0-9._]*$

Required: Yes

project

The name or ARN of the project that contains the experiment to stop.

Length Constraints: Minimum length of 0. Maximum length of 2048.

Pattern: (^[a-zA-Z0-9._-]*$)|(arn:[^:]*:[^:]*:[^:]*:[^:]*:project/[a-zA-Z0-9._-]*)

Required: Yes

Request Body

The request accepts the following data in JSON format.

desiredState

Specify whether the experiment is to be considered COMPLETED or CANCELLED after it stops.

Type: String

Valid Values: COMPLETED | CANCELLED

Required: No

reason

A string that describes why you are stopping the experiment.

Type: String

Length Constraints: Minimum length of 0. Maximum length of 160.

Pattern: .*

Required: No

Response Syntax


HTTP/1.1 200
Content-type: application/json

{
   "endedTime": number
}

Response Elements

If the action is successful, the service sends back an HTTP 200 response.

The following data is returned in JSON format by the service.

endedTime

The date and time that the experiment stopped.

Type: Timestamp

Errors

For information about the errors that are common to all actions, see Common Errors.

AccessDeniedException

You do not have sufficient permissions to perform this action.

HTTP Status Code: 403

ConflictException

A resource was in an inconsistent state during an update or a deletion.

HTTP Status Code: 409

ResourceNotFoundException

The request references a resource that does not exist.

HTTP Status Code: 404

ServiceQuotaExceededException

The request would cause a service quota to be exceeded.

HTTP Status Code: 402

ThrottlingException

The request was denied because of request throttling. Retry the request.

HTTP Status Code: 429

ValidationException

The value of a parameter in the request caused an error.

HTTP Status Code: 400