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

StartLaunch

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.

Starts an existing launch. To create a launch, use CreateLaunch.

Request Syntax


POST /projects/project/launches/launch/start HTTP/1.1

URI Request Parameters

The request uses the following URI parameters.

launch

The name of the launch to start.

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 launch to start.

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 does not have a request body.

Response Syntax


HTTP/1.1 200
Content-type: application/json

{
   "launch": { 
      "arn": "string",
      "createdTime": number,
      "description": "string",
      "execution": { 
         "endedTime": number,
         "startedTime": number
      },
      "groups": [ 
         { 
            "description": "string",
            "featureVariations": { 
               "string" : "string" 
            },
            "name": "string"
         }
      ],
      "lastUpdatedTime": number,
      "metricMonitors": [ 
         { 
            "metricDefinition": { 
               "entityIdKey": "string",
               "eventPattern": "string",
               "name": "string",
               "unitLabel": "string",
               "valueKey": "string"
            }
         }
      ],
      "name": "string",
      "project": "string",
      "randomizationSalt": "string",
      "scheduledSplitsDefinition": { 
         "steps": [ 
            { 
               "groupWeights": { 
                  "string" : number 
               },
               "segmentOverrides": [ 
                  { 
                     "evaluationOrder": number,
                     "segment": "string",
                     "weights": { 
                        "string" : number 
                     }
                  }
               ],
               "startTime": number
            }
         ]
      },
      "status": "string",
      "statusReason": "string",
      "tags": { 
         "string" : "string" 
      },
      "type": "string"
   }
}

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.

launch

A structure that contains information about the launch that was started.

Type: Launch object

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