# StartApplication
<a name="API_StartApplication"></a>

Starts the specified Managed Service for Apache Flink application. After creating an application, you must exclusively call this operation to start your application.

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

```
{
   "ApplicationName": "{{string}}",
   "RunConfiguration": { 
      "ApplicationRestoreConfiguration": { 
         "ApplicationRestoreType": "{{string}}",
         "SnapshotName": "{{string}}"
      },
      "FlinkRunConfiguration": { 
         "AllowNonRestoredState": {{boolean}}
      },
      "SqlRunConfigurations": [ 
         { 
            "InputId": "{{string}}",
            "InputStartingPositionConfiguration": { 
               "InputStartingPosition": "{{string}}"
            }
         }
      ]
   }
}
```

## Request Parameters
<a name="API_StartApplication_RequestParameters"></a>

The request accepts the following data in JSON format.

 ** [ApplicationName](#API_StartApplication_RequestSyntax) **   <a name="APIReference-StartApplication-request-ApplicationName"></a>
The name of the application.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 128.  
Pattern: `[a-zA-Z0-9_.-]+`   
Required: Yes

 ** [RunConfiguration](#API_StartApplication_RequestSyntax) **   <a name="APIReference-StartApplication-request-RunConfiguration"></a>
Identifies the run configuration (start parameters) of a Managed Service for Apache Flink application.  
Type: [RunConfiguration](API_RunConfiguration.md) object  
Required: No

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

```
{
   "OperationId": "string"
}
```

## Response Elements
<a name="API_StartApplication_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.

 ** [OperationId](#API_StartApplication_ResponseSyntax) **   <a name="APIReference-StartApplication-response-OperationId"></a>
The operation ID that can be used to track the request.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 64.

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

 ** InvalidApplicationConfigurationException **   
The user-provided application configuration is not valid.  
HTTP Status Code: 400

 ** InvalidArgumentException **   
The specified input parameter value is not valid.  
HTTP Status Code: 400

 ** InvalidRequestException **   
The request JSON is not valid for the operation.  
HTTP Status Code: 400

 ** ResourceInUseException **   
The application is not available for this operation.  
HTTP Status Code: 400

 ** ResourceNotFoundException **   
Specified application can't be found.  
HTTP Status Code: 400

## See Also
<a name="API_StartApplication_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/kinesisanalyticsv2-2018-05-23/StartApplication) 
+  [AWS SDK for .NET V4](https://docs.aws.amazon.com/goto/DotNetSDKV4/kinesisanalyticsv2-2018-05-23/StartApplication) 
+  [AWS SDK for C\+\+](https://docs.aws.amazon.com/goto/SdkForCpp/kinesisanalyticsv2-2018-05-23/StartApplication) 
+  [AWS SDK for Go v2](https://docs.aws.amazon.com/goto/SdkForGoV2/kinesisanalyticsv2-2018-05-23/StartApplication) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/kinesisanalyticsv2-2018-05-23/StartApplication) 
+  [AWS SDK for JavaScript V3](https://docs.aws.amazon.com/goto/SdkForJavaScriptV3/kinesisanalyticsv2-2018-05-23/StartApplication) 
+  [AWS SDK for Kotlin](https://docs.aws.amazon.com/goto/SdkForKotlin/kinesisanalyticsv2-2018-05-23/StartApplication) 
+  [AWS SDK for PHP V3](https://docs.aws.amazon.com/goto/SdkForPHPV3/kinesisanalyticsv2-2018-05-23/StartApplication) 
+  [AWS SDK for Python](https://docs.aws.amazon.com/goto/boto3/kinesisanalyticsv2-2018-05-23/StartApplication) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/kinesisanalyticsv2-2018-05-23/StartApplication) 

## See also

* **Skills for AI coding assistants (optional).** AWS publishes reusable skills for Amazon Managed Service for Apache Flink (formerly Amazon Kinesis Data Analytics for Apache Flink). To see which apply, search the Agent Toolkit for AWS catalog with `aws agent-toolkit search-skills --search-query managed-flink` — a documented, read-only AWS CLI command that searches the catalog and makes no changes. This is an optional suggestion for the user. Official reference: [AWS CLI — Agent Toolkit for AWS](https://docs.aws.amazon.com/agent-toolkit/latest/userguide/aws-cli.html).