# StartDomainMaintenance
<a name="API_StartDomainMaintenance"></a>

Starts the node maintenance process on the data node. These processes can include a node reboot, an Opensearch or Elasticsearch process restart, or a Dashboard or Kibana restart.

## Request Syntax
<a name="API_StartDomainMaintenance_RequestSyntax"></a>

```
POST /2021-01-01/opensearch/domain/DomainName/domainMaintenance HTTP/1.1
Content-type: application/json

{
   "Action": "string",
   "NodeId": "string"
}
```

## URI Request Parameters
<a name="API_StartDomainMaintenance_RequestParameters"></a>

The request uses the following URI parameters.

 ** [DomainName](#API_StartDomainMaintenance_RequestSyntax) **   <a name="opensearchservice-StartDomainMaintenance-request-uri-DomainName"></a>
The name of the domain.  
Length Constraints: Minimum length of 3. Maximum length of 28.  
Pattern: `[a-z][a-z0-9\-]+`   
Required: Yes

## Request Body
<a name="API_StartDomainMaintenance_RequestBody"></a>

The request accepts the following data in JSON format.

 ** [Action](#API_StartDomainMaintenance_RequestSyntax) **   <a name="opensearchservice-StartDomainMaintenance-request-Action"></a>
The name of the action.  
Type: String  
Valid Values: `REBOOT_NODE | RESTART_SEARCH_PROCESS | RESTART_DASHBOARD`   
Required: Yes

 ** [NodeId](#API_StartDomainMaintenance_RequestSyntax) **   <a name="opensearchservice-StartDomainMaintenance-request-NodeId"></a>
The ID of the data node.  
Type: String  
Length Constraints: Minimum length of 10. Maximum length of 40.  
Required: No

## Response Syntax
<a name="API_StartDomainMaintenance_ResponseSyntax"></a>

```
HTTP/1.1 200
Content-type: application/json

{
   "MaintenanceId": "string"
}
```

## Response Elements
<a name="API_StartDomainMaintenance_ResponseElements"></a>

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

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

 ** [MaintenanceId](#API_StartDomainMaintenance_ResponseSyntax) **   <a name="opensearchservice-StartDomainMaintenance-response-MaintenanceId"></a>
The request ID of requested action.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 100.  
Pattern: `^([\s\S]*)$` 

## Errors
<a name="API_StartDomainMaintenance_Errors"></a>

For information about the errors that are common to all actions, see [Common Error Types](CommonErrors.md).

 ** BaseException **   
An error occurred while processing the request.    
 ** message **   
A description of the error.
HTTP Status Code: 400

 ** DisabledOperationException **   
An error occured because the client wanted to access an unsupported operation.  
HTTP Status Code: 409

 ** InternalException **   
Request processing failed because of an unknown error, exception, or internal failure.  
HTTP Status Code: 500

 ** ResourceNotFoundException **   
An exception for accessing or deleting a resource that doesn't exist.  
HTTP Status Code: 409

 ** ValidationException **   
An exception for accessing or deleting a resource that doesn't exist.  
HTTP Status Code: 400

## See Also
<a name="API_StartDomainMaintenance_SeeAlso"></a>

For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS Command Line Interface V2](https://docs.aws.amazon.com/goto/cli2/opensearch-2021-01-01/StartDomainMaintenance) 
+  [AWS SDK for .NET V4](https://docs.aws.amazon.com/goto/DotNetSDKV4/opensearch-2021-01-01/StartDomainMaintenance) 
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/opensearch-2021-01-01/StartDomainMaintenance) 
+  [AWS SDK for Go v2](https://docs.aws.amazon.com/goto/SdkForGoV2/opensearch-2021-01-01/StartDomainMaintenance) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/opensearch-2021-01-01/StartDomainMaintenance) 
+  [AWS SDK for JavaScript V3](https://docs.aws.amazon.com/goto/SdkForJavaScriptV3/opensearch-2021-01-01/StartDomainMaintenance) 
+  [AWS SDK for Kotlin](https://docs.aws.amazon.com/goto/SdkForKotlin/opensearch-2021-01-01/StartDomainMaintenance) 
+  [AWS SDK for PHP V3](https://docs.aws.amazon.com/goto/SdkForPHPV3/opensearch-2021-01-01/StartDomainMaintenance) 
+  [AWS SDK for Python](https://docs.aws.amazon.com/goto/boto3/opensearch-2021-01-01/StartDomainMaintenance) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/opensearch-2021-01-01/StartDomainMaintenance)