# StartTopicsDetectionJob
<a name="API_StartTopicsDetectionJob"></a>

**Important**  
Service availability notice: Amazon Comprehend topic modeling, event detection, and prompt safety classification features will no longer be available to new customers, effective April 30, 2026. For more information, see [Amazon Comprehend feature availability change](https://docs.aws.amazon.com/comprehend/latest/dg/comprehend-availability-change.html). 

Starts an asynchronous topic detection job. Use the `DescribeTopicDetectionJob` operation to track the status of a job.

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

```
{
   "ClientRequestToken": "string",
   "DataAccessRoleArn": "string",
   "InputDataConfig": { 
      "DocumentReaderConfig": { 
         "DocumentReadAction": "string",
         "DocumentReadMode": "string",
         "FeatureTypes": [ "string" ]
      },
      "InputFormat": "string",
      "S3Uri": "string"
   },
   "JobName": "string",
   "NumberOfTopics": number,
   "OutputDataConfig": { 
      "KmsKeyId": "string",
      "S3Uri": "string"
   },
   "Tags": [ 
      { 
         "Key": "string",
         "Value": "string"
      }
   ],
   "VolumeKmsKeyId": "string",
   "VpcConfig": { 
      "SecurityGroupIds": [ "string" ],
      "Subnets": [ "string" ]
   }
}
```

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

For information about the parameters that are common to all actions, see [Common Parameters](CommonParameters.md).

The request accepts the following data in JSON format.

 ** [ClientRequestToken](#API_StartTopicsDetectionJob_RequestSyntax) **   <a name="comprehend-StartTopicsDetectionJob-request-ClientRequestToken"></a>
A unique identifier for the request. If you do not set the client request token, Amazon Comprehend generates one.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 64.  
Pattern: `^[a-zA-Z0-9-]+$`   
Required: No

 ** [DataAccessRoleArn](#API_StartTopicsDetectionJob_RequestSyntax) **   <a name="comprehend-StartTopicsDetectionJob-request-DataAccessRoleArn"></a>
The Amazon Resource Name (ARN) of the IAM role that grants Amazon Comprehend read access to your input data. For more information, see [Role-based permissions](https://docs.aws.amazon.com/comprehend/latest/dg/security_iam_id-based-policy-examples.html#auth-role-permissions).  
Type: String  
Length Constraints: Minimum length of 20. Maximum length of 2048.  
Pattern: `arn:aws(-[^:]+)?:iam::[0-9]{12}:role/.+`   
Required: Yes

 ** [InputDataConfig](#API_StartTopicsDetectionJob_RequestSyntax) **   <a name="comprehend-StartTopicsDetectionJob-request-InputDataConfig"></a>
Specifies the format and location of the input data for the job.  
Type: [InputDataConfig](API_InputDataConfig.md) object  
Required: Yes

 ** [JobName](#API_StartTopicsDetectionJob_RequestSyntax) **   <a name="comprehend-StartTopicsDetectionJob-request-JobName"></a>
The identifier of the job.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 256.  
Pattern: `^([\p{L}\p{Z}\p{N}_.:/=+\-%@]*)$`   
Required: No

 ** [NumberOfTopics](#API_StartTopicsDetectionJob_RequestSyntax) **   <a name="comprehend-StartTopicsDetectionJob-request-NumberOfTopics"></a>
The number of topics to detect.  
Type: Integer  
Valid Range: Minimum value of 1. Maximum value of 100.  
Required: No

 ** [OutputDataConfig](#API_StartTopicsDetectionJob_RequestSyntax) **   <a name="comprehend-StartTopicsDetectionJob-request-OutputDataConfig"></a>
Specifies where to send the output files. The output is a compressed archive with two files, `topic-terms.csv` that lists the terms associated with each topic, and `doc-topics.csv` that lists the documents associated with each topic  
Type: [OutputDataConfig](API_OutputDataConfig.md) object  
Required: Yes

 ** [Tags](#API_StartTopicsDetectionJob_RequestSyntax) **   <a name="comprehend-StartTopicsDetectionJob-request-Tags"></a>
Tags to associate with the topics detection job. A tag is a key-value pair that adds metadata to a resource used by Amazon Comprehend. For example, a tag with "Sales" as the key might be added to a resource to indicate its use by the sales department.  
Type: Array of [Tag](API_Tag.md) objects  
Required: No

 ** [VolumeKmsKeyId](#API_StartTopicsDetectionJob_RequestSyntax) **   <a name="comprehend-StartTopicsDetectionJob-request-VolumeKmsKeyId"></a>
ID for the AWS Key Management Service (KMS) key that Amazon Comprehend uses to encrypt data on the storage volume attached to the ML compute instance(s) that process the analysis job. The VolumeKmsKeyId can be either of the following formats:  
+ KMS Key ID: `"1234abcd-12ab-34cd-56ef-1234567890ab"` 
+ Amazon Resource Name (ARN) of a KMS Key: `"arn:aws:kms:us-west-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab"` 
Type: String  
Length Constraints: Maximum length of 2048.  
Pattern: `^\p{ASCII}+$`   
Required: No

 ** [VpcConfig](#API_StartTopicsDetectionJob_RequestSyntax) **   <a name="comprehend-StartTopicsDetectionJob-request-VpcConfig"></a>
Configuration parameters for an optional private Virtual Private Cloud (VPC) containing the resources you are using for your topic detection job. For more information, see [Amazon VPC](https://docs.aws.amazon.com/vpc/latest/userguide/what-is-amazon-vpc.html).   
Type: [VpcConfig](API_VpcConfig.md) object  
Required: No

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

```
{
   "JobArn": "string",
   "JobId": "string",
   "JobStatus": "string"
}
```

## Response Elements
<a name="API_StartTopicsDetectionJob_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.

 ** [JobArn](#API_StartTopicsDetectionJob_ResponseSyntax) **   <a name="comprehend-StartTopicsDetectionJob-response-JobArn"></a>
The Amazon Resource Name (ARN) of the topics detection job. It is a unique, fully qualified identifier for the job. It includes the AWS account, AWS Region, and the job ID. The format of the ARN is as follows:  
 `arn:<partition>:comprehend:<region>:<account-id>:topics-detection-job/<job-id>`   
The following is an example job ARN:  
 `arn:aws:comprehend:us-west-2:111122223333:document-classification-job/1234abcd12ab34cd56ef1234567890ab`   
Type: String  
Length Constraints: Maximum length of 256.  
Pattern: `arn:aws(-[^:]+)?:comprehend:[a-zA-Z0-9-]*:[0-9]{12}:[a-zA-Z0-9-]{1,64}/[a-zA-Z0-9](-*[a-zA-Z0-9])*((/dataset/[a-zA-Z0-9](-*[a-zA-Z0-9])*)|(/version/[a-zA-Z0-9](-*[a-zA-Z0-9])*))?` 

 ** [JobId](#API_StartTopicsDetectionJob_ResponseSyntax) **   <a name="comprehend-StartTopicsDetectionJob-response-JobId"></a>
The identifier generated for the job. To get the status of the job, use this identifier with the `DescribeTopicDetectionJob` operation.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 32.  
Pattern: `^([\p{L}\p{Z}\p{N}_.:/=+\-%@]*)$` 

 ** [JobStatus](#API_StartTopicsDetectionJob_ResponseSyntax) **   <a name="comprehend-StartTopicsDetectionJob-response-JobStatus"></a>
The status of the job:   
+ SUBMITTED - The job has been received and is queued for processing.
+ IN\$1PROGRESS - Amazon Comprehend is processing the job.
+ COMPLETED - The job was successfully completed and the output is available.
+ FAILED - The job did not complete. To get details, use the `DescribeTopicDetectionJob` operation.
Type: String  
Valid Values: `SUBMITTED | IN_PROGRESS | COMPLETED | FAILED | STOP_REQUESTED | STOPPED` 

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

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

 ** InternalServerException **   
An internal server error occurred. Retry your request.  
HTTP Status Code: 500

 ** InvalidRequestException **   
The request is invalid.    
 ** Detail **   
Provides additional detail about why the request failed.
HTTP Status Code: 400

 ** KmsKeyValidationException **   
The KMS customer managed key (CMK) entered cannot be validated. Verify the key and re-enter it.  
HTTP Status Code: 400

 ** ResourceInUseException **   
The specified resource name is already in use. Use a different name and try your request again.  
HTTP Status Code: 400

 ** TooManyRequestsException **   
The number of requests exceeds the limit. Resubmit your request later.  
HTTP Status Code: 400

 ** TooManyTagsException **   
The request contains more tags than can be associated with a resource (50 tags per resource). The maximum number of tags includes both existing tags and those included in your current request.   
HTTP Status Code: 400

## See Also
<a name="API_StartTopicsDetectionJob_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/comprehend-2017-11-27/StartTopicsDetectionJob) 
+  [AWS SDK for .NET V4](https://docs.aws.amazon.com/goto/DotNetSDKV4/comprehend-2017-11-27/StartTopicsDetectionJob) 
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/comprehend-2017-11-27/StartTopicsDetectionJob) 
+  [AWS SDK for Go v2](https://docs.aws.amazon.com/goto/SdkForGoV2/comprehend-2017-11-27/StartTopicsDetectionJob) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/comprehend-2017-11-27/StartTopicsDetectionJob) 
+  [AWS SDK for JavaScript V3](https://docs.aws.amazon.com/goto/SdkForJavaScriptV3/comprehend-2017-11-27/StartTopicsDetectionJob) 
+  [AWS SDK for Kotlin](https://docs.aws.amazon.com/goto/SdkForKotlin/comprehend-2017-11-27/StartTopicsDetectionJob) 
+  [AWS SDK for PHP V3](https://docs.aws.amazon.com/goto/SdkForPHPV3/comprehend-2017-11-27/StartTopicsDetectionJob) 
+  [AWS SDK for Python](https://docs.aws.amazon.com/goto/boto3/comprehend-2017-11-27/StartTopicsDetectionJob) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/comprehend-2017-11-27/StartTopicsDetectionJob)