# DescribeRecommender
<a name="API_DescribeRecommender"></a>

Describes the given recommender, including its status.

A recommender can be in one of the following states:
+ CREATE PENDING > CREATE IN\$1PROGRESS > ACTIVE -or- CREATE FAILED
+ STOP PENDING > STOP IN\$1PROGRESS > INACTIVE > START PENDING > START IN\$1PROGRESS > ACTIVE
+ DELETE PENDING > DELETE IN\$1PROGRESS

When the `status` is `CREATE FAILED`, the response includes the `failureReason` key, which describes why.

The `modelMetrics` key is null when the recommender is being created or deleted.

For more information on recommenders, see [CreateRecommender](https://docs.aws.amazon.com/personalize/latest/dg/API_CreateRecommender.html).

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

```
{
   "recommenderArn": "string"
}
```

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

The request accepts the following data in JSON format.

 ** [recommenderArn](#API_DescribeRecommender_RequestSyntax) **   <a name="personalize-DescribeRecommender-request-recommenderArn"></a>
The Amazon Resource Name (ARN) of the recommender to describe.  
Type: String  
Length Constraints: Maximum length of 256.  
Pattern: `arn:([a-z\d-]+):personalize:.*:.*:.+`   
Required: Yes

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

```
{
   "recommender": { 
      "creationDateTime": number,
      "datasetGroupArn": "string",
      "failureReason": "string",
      "lastUpdatedDateTime": number,
      "latestRecommenderUpdate": { 
         "creationDateTime": number,
         "failureReason": "string",
         "lastUpdatedDateTime": number,
         "recommenderConfig": { 
            "enableMetadataWithRecommendations": boolean,
            "itemExplorationConfig": { 
               "string" : "string" 
            },
            "minRecommendationRequestsPerSecond": number,
            "trainingDataConfig": { 
               "excludedDatasetColumns": { 
                  "string" : [ "string" ]
               },
               "includedDatasetColumns": { 
                  "string" : [ "string" ]
               }
            }
         },
         "status": "string"
      },
      "modelMetrics": { 
         "string" : number 
      },
      "name": "string",
      "recipeArn": "string",
      "recommenderArn": "string",
      "recommenderConfig": { 
         "enableMetadataWithRecommendations": boolean,
         "itemExplorationConfig": { 
            "string" : "string" 
         },
         "minRecommendationRequestsPerSecond": number,
         "trainingDataConfig": { 
            "excludedDatasetColumns": { 
               "string" : [ "string" ]
            },
            "includedDatasetColumns": { 
               "string" : [ "string" ]
            }
         }
      },
      "status": "string"
   }
}
```

## Response Elements
<a name="API_DescribeRecommender_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.

 ** [recommender](#API_DescribeRecommender_ResponseSyntax) **   <a name="personalize-DescribeRecommender-response-recommender"></a>
The properties of the recommender.  
Type: [Recommender](API_Recommender.md) object

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

 ** InvalidInputException **   
Provide a valid value for the field or parameter.  
HTTP Status Code: 400

 ** ResourceNotFoundException **   
Could not find the specified resource.  
HTTP Status Code: 400

## See Also
<a name="API_DescribeRecommender_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/personalize-2018-05-22/DescribeRecommender) 
+  [AWS SDK for .NET V4](https://docs.aws.amazon.com/goto/DotNetSDKV4/personalize-2018-05-22/DescribeRecommender) 
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/personalize-2018-05-22/DescribeRecommender) 
+  [AWS SDK for Go v2](https://docs.aws.amazon.com/goto/SdkForGoV2/personalize-2018-05-22/DescribeRecommender) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/personalize-2018-05-22/DescribeRecommender) 
+  [AWS SDK for JavaScript V3](https://docs.aws.amazon.com/goto/SdkForJavaScriptV3/personalize-2018-05-22/DescribeRecommender) 
+  [AWS SDK for Kotlin](https://docs.aws.amazon.com/goto/SdkForKotlin/personalize-2018-05-22/DescribeRecommender) 
+  [AWS SDK for PHP V3](https://docs.aws.amazon.com/goto/SdkForPHPV3/personalize-2018-05-22/DescribeRecommender) 
+  [AWS SDK for Python](https://docs.aws.amazon.com/goto/boto3/personalize-2018-05-22/DescribeRecommender) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/personalize-2018-05-22/DescribeRecommender)