Request Syntax Request Parameters Response Syntax Response Elements Errors See Also

UpdateStateMachine

Updates an existing state machine by modifying its definition, roleArn, or loggingConfiguration. Running executions will continue to use the previous definition and roleArn. You must include at least one of definition or roleArn or you will receive a MissingRequiredParameter error.

A qualified state machine ARN refers to a Distributed Map state defined within a state machine. For example, the qualified state machine ARN arn:partition:states:region:account-id:stateMachine:stateMachineName/mapStateLabel refers to a Distributed Map state with a label mapStateLabel in the state machine named stateMachineName.

A qualified state machine ARN can either refer to a Distributed Map state defined within a state machine, a version ARN, or an alias ARN.

The following are some examples of qualified and unqualified state machine ARNs:

The following qualified state machine ARN refers to a Distributed Map state with a label mapStateLabel in a state machine named myStateMachine.

arn:partition:states:region:account-id:stateMachine:myStateMachine/mapStateLabel

Note
If you provide a qualified state machine ARN that refers to a Distributed Map state, the request fails with ValidationException.
The following qualified state machine ARN refers to an alias named PROD.

arn:<partition>:states:<region>:<account-id>:stateMachine:<myStateMachine:PROD>

Note
If you provide a qualified state machine ARN that refers to a version ARN or an alias ARN, the request starts execution for that version or alias.
The following unqualified state machine ARN refers to a state machine named myStateMachine.

arn:<partition>:states:<region>:<account-id>:stateMachine:<myStateMachine>

After you update your state machine, you can set the publish parameter to true in the same action to publish a new version. This way, you can opt-in to strict versioning of your state machine.

Note

Step Functions assigns monotonically increasing integers for state machine versions, starting at version number 1.

Note

All StartExecution calls within a few seconds use the updated definition and roleArn. Executions started immediately after you call UpdateStateMachine may use the previous state machine definition and roleArn.

Request Syntax


{
   "definition": "string",
   "loggingConfiguration": { 
      "destinations": [ 
         { 
            "cloudWatchLogsLogGroup": { 
               "logGroupArn": "string"
            }
         }
      ],
      "includeExecutionData": boolean,
      "level": "string"
   },
   "publish": boolean,
   "roleArn": "string",
   "stateMachineArn": "string",
   "tracingConfiguration": { 
      "enabled": boolean
   },
   "versionDescription": "string"
}

Request Parameters

For information about the parameters that are common to all actions, see Common Parameters.

The request accepts the following data in JSON format.

definition

The Amazon States Language definition of the state machine. See Amazon States Language.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 1048576.

Required: No

loggingConfiguration

Use the LoggingConfiguration data type to set CloudWatch Logs options.

Type: LoggingConfiguration object

Required: No

publish

Specifies whether the state machine version is published. The default is false. To publish a version after updating the state machine, set publish to true.

Type: Boolean

Required: No

roleArn

The Amazon Resource Name (ARN) of the IAM role of the state machine.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 256.

Required: No

stateMachineArn

The Amazon Resource Name (ARN) of the state machine.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 256.

Required: Yes

tracingConfiguration

Selects whether Amazon X-Ray tracing is enabled.

Type: TracingConfiguration object

Required: No

versionDescription

An optional description of the state machine version to publish.

You can only specify the versionDescription parameter if you've set publish to true.

Type: String

Length Constraints: Maximum length of 256.

Required: No

Response Syntax


{
   "revisionId": "string",
   "stateMachineVersionArn": "string",
   "updateDate": 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.

revisionId

The revision identifier for the updated state machine.

Type: String

stateMachineVersionArn

The Amazon Resource Name (ARN) of the published state machine version.

If the publish parameter isn't set to true, this field returns null.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 256.

updateDate

The date and time the state machine was updated.

Type: Timestamp

Errors

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

ConflictException

Updating or deleting a resource can cause an inconsistent state. This error occurs when there're concurrent requests for DeleteStateMachineVersion, PublishStateMachineVersion, or UpdateStateMachine with the publish parameter set to true.

HTTP Status Code: 409

HTTP Status Code: 400

InvalidArn

The provided Amazon Resource Name (ARN) is not valid.

HTTP Status Code: 400

InvalidDefinition

The provided Amazon States Language definition is not valid.

HTTP Status Code: 400

InvalidLoggingConfiguration

HTTP Status Code: 400

InvalidTracingConfiguration

Your tracingConfiguration key does not match, or enabled has not been set to true or false.

HTTP Status Code: 400

MissingRequiredParameter

Request is missing a required parameter. This error occurs if both definition and roleArn are not specified.

HTTP Status Code: 400

ServiceQuotaExceededException

The request would cause a service quota to be exceeded.

HTTP Status Code: 402

HTTP Status Code: 400

StateMachineDeleting

The specified state machine is being deleted.

HTTP Status Code: 400

StateMachineDoesNotExist

The specified state machine does not exist.

HTTP Status Code: 400

ValidationException

The input does not satisfy the constraints specified by an Amazon service.

HTTP Status Code: 400