# StartEventsDetectionJob
<a name="API_StartEventsDetectionJob"></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 event detection job for a collection of documents.

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

```
{
   "ClientRequestToken": "string",
   "DataAccessRoleArn": "string",
   "InputDataConfig": { 
      "DocumentReaderConfig": { 
         "DocumentReadAction": "string",
         "DocumentReadMode": "string",
         "FeatureTypes": [ "string" ]
      },
      "InputFormat": "string",
      "S3Uri": "string"
   },
   "JobName": "string",
   "LanguageCode": "string",
   "OutputDataConfig": { 
      "KmsKeyId": "string",
      "S3Uri": "string"
   },
   "Tags": [ 
      { 
         "Key": "string",
         "Value": "string"
      }
   ],
   "TargetEventTypes": [ "string" ]
}
```

## Request Parameters
<a name="API_StartEventsDetectionJob_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_StartEventsDetectionJob_RequestSyntax) **   <a name="comprehend-StartEventsDetectionJob-request-ClientRequestToken"></a>
An unique identifier for the request. If you don't 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_StartEventsDetectionJob_RequestSyntax) **   <a name="comprehend-StartEventsDetectionJob-request-DataAccessRoleArn"></a>
The Amazon Resource Name (ARN) of the IAM role that grants Amazon Comprehend read access to your input data.  
Type: String  
Length Constraints: Minimum length of 20. Maximum length of 2048.  
Pattern: `arn:aws(-[^:]+)?:iam::[0-9]{12}:role/.+`   
Required: Yes

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

 ** [LanguageCode](#API_StartEventsDetectionJob_RequestSyntax) **   <a name="comprehend-StartEventsDetectionJob-request-LanguageCode"></a>
The language code of the input documents.  
Type: String  
Valid Values: `en | es | fr | de | it | pt | ar | hi | ja | ko | zh | zh-TW`   
Required: Yes

 ** [OutputDataConfig](#API_StartEventsDetectionJob_RequestSyntax) **   <a name="comprehend-StartEventsDetectionJob-request-OutputDataConfig"></a>
Specifies where to send the output files.  
Type: [OutputDataConfig](API_OutputDataConfig.md) object  
Required: Yes

 ** [Tags](#API_StartEventsDetectionJob_RequestSyntax) **   <a name="comprehend-StartEventsDetectionJob-request-Tags"></a>
Tags to associate with the events 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

 ** [TargetEventTypes](#API_StartEventsDetectionJob_RequestSyntax) **   <a name="comprehend-StartEventsDetectionJob-request-TargetEventTypes"></a>
The types of events to detect in the input documents.  
Type: Array of strings  
Array Members: Minimum number of 1 item.  
Length Constraints: Minimum length of 1. Maximum length of 40.  
Pattern: `[A-Z_]*`   
Required: Yes

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

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

## Response Elements
<a name="API_StartEventsDetectionJob_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_StartEventsDetectionJob_ResponseSyntax) **   <a name="comprehend-StartEventsDetectionJob-response-JobArn"></a>
The Amazon Resource Name (ARN) of the events 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>:events-detection-job/<job-id>`   
The following is an example job ARN:  
 `arn:aws:comprehend:us-west-2:111122223333:events-detection-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_StartEventsDetectionJob_ResponseSyntax) **   <a name="comprehend-StartEventsDetectionJob-response-JobId"></a>
An unique identifier for the request. If you don't set the client request token, Amazon Comprehend generates one.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 32.  
Pattern: `^([\p{L}\p{Z}\p{N}_.:/=+\-%@]*)$` 

 ** [JobStatus](#API_StartEventsDetectionJob_ResponseSyntax) **   <a name="comprehend-StartEventsDetectionJob-response-JobStatus"></a>
The status of the events detection job.  
Type: String  
Valid Values: `SUBMITTED | IN_PROGRESS | COMPLETED | FAILED | STOP_REQUESTED | STOPPED` 

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