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

UpdateEnvironment

Important

AWS Mainframe Modernization Service (Managed Runtime Environment experience) will no longer be open to new customers starting on November 7, 2025. If you would like to use the service, please sign up prior to November 7, 2025. For capabilities similar to AWS Mainframe Modernization Service (Managed Runtime Environment experience) explore AWS Mainframe Modernization Service (Self-Managed Experience). Existing customers can continue to use the service as normal. For more information, see AWS Mainframe Modernization availability change.

Updates the configuration details for a specific runtime environment.

Request Syntax


PATCH /environments/environmentId HTTP/1.1
Content-type: application/json

{
   "applyDuringMaintenanceWindow": boolean,
   "desiredCapacity": number,
   "engineVersion": "string",
   "forceUpdate": boolean,
   "instanceType": "string",
   "preferredMaintenanceWindow": "string"
}

URI Request Parameters

The request uses the following URI parameters.

environmentId

The unique identifier of the runtime environment that you want to update.

Pattern: \S{1,80}

Required: Yes

Request Body

The request accepts the following data in JSON format.

applyDuringMaintenanceWindow

Indicates whether to update the runtime environment during the maintenance window. The default is false. Currently, AWS Mainframe Modernization accepts the engineVersion parameter only if applyDuringMaintenanceWindow is true. If any parameter other than engineVersion is provided in UpdateEnvironmentRequest, it will fail if applyDuringMaintenanceWindow is set to true.

Type: Boolean

Required: No

desiredCapacity

The desired capacity for the runtime environment to update. The minimum possible value is 0 and the maximum is 100.

Type: Integer

Required: No

engineVersion

The version of the runtime engine for the runtime environment.

Type: String

Pattern: \S{1,10}

Required: No

forceUpdate

Forces the updates on the environment. This option is needed if the applications in the environment are not stopped or if there are ongoing application-related activities in the environment.

If you use this option, be aware that it could lead to data corruption in the applications, and that you might need to perform repair and recovery procedures for the applications.

This option is not needed if the attribute being updated is preferredMaintenanceWindow.

Type: Boolean

Required: No

instanceType

The instance type for the runtime environment to update.

Type: String

Pattern: \S{1,20}

Required: No

preferredMaintenanceWindow

Configures the maintenance window that you want for the runtime environment. The maintenance window must have the format ddd:hh24:mi-ddd:hh24:mi and must be less than 24 hours. The following two examples are valid maintenance windows: sun:23:45-mon:00:15 or sat:01:00-sat:03:00.

If you do not provide a value, a random system-generated value will be assigned.

Type: String

Required: No

Response Syntax


HTTP/1.1 200
Content-type: application/json

{
   "environmentId": "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.

environmentId

The unique identifier of the runtime environment that was updated.

Type: String

Pattern: \S{1,80}

Errors

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

AccessDeniedException

The account or role doesn't have the right permissions to make the request.

HTTP Status Code: 403

ConflictException

The parameters provided in the request conflict with existing resources.

resourceId: The ID of the conflicting resource.
resourceType: The type of the conflicting resource.

HTTP Status Code: 409

InternalServerException

An unexpected error occurred during the processing of the request.

retryAfterSeconds: The number of seconds to wait before retrying the request.

HTTP Status Code: 500

ResourceNotFoundException

The specified resource was not found.

resourceId: The ID of the missing resource.
resourceType: The type of the missing resource.

HTTP Status Code: 404

ServiceQuotaExceededException

Important

One or more quotas for AWS Mainframe Modernization exceeds the limit.

quotaCode: The identifier of the exceeded quota.
resourceId: The ID of the resource that is exceeding the quota limit.
resourceType: The type of resource that is exceeding the quota limit for AWS Mainframe Modernization.
serviceCode: A code that identifies the service that the exceeded quota belongs to.

HTTP Status Code: 402

ThrottlingException

The number of requests made exceeds the limit.

quotaCode: The identifier of the throttled request.
retryAfterSeconds: The number of seconds to wait before retrying the request.
serviceCode: The identifier of the service that the throttled request was made to.

HTTP Status Code: 429

ValidationException

One or more parameters provided in the request is not valid.

fieldList: The list of fields that failed service validation.
reason: The reason why it failed service validation.

HTTP Status Code: 400