AWS Lambda


Removes an event source mapping. This means AWS Lambda will no longer invoke the function for events in the associated source.

This operation requires permission for the lambda:DeleteEventSourceMapping action.

Request Syntax

DELETE /2015-03-31/event-source-mappings/UUID HTTP/1.1

URI Request Parameters

The request requires the following URI parameters.


The event source mapping ID.

Request Body

The request does not have a request body.

Response Syntax

HTTP/1.1 202 Content-type: application/json { "BatchSize": number, "EventSourceArn": "string", "FunctionArn": "string", "LastModified": number, "LastProcessingResult": "string", "State": "string", "StateTransitionReason": "string", "UUID": "string" }

Response Elements

If the action is successful, the service sends back an HTTP 202 response.

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


The largest number of records that AWS Lambda will retrieve from your event source at the time of invoking your function. Your function receives an event with all the retrieved records.

Type: Integer

Valid Range: Minimum value of 1. Maximum value of 10000.


The Amazon Resource Name (ARN) of the Amazon Kinesis or DynamoDB stream that is the source of events.

Type: String

Pattern: arn:(aws[a-zA-Z0-9-]*):([a-zA-Z0-9\-])+:([a-z]{2}(-gov)?-[a-z]+-\d{1})?:(\d{12})?:(.*)


The Lambda function to invoke when AWS Lambda detects an event on the poll-based source.

Type: String

Pattern: arn:(aws[a-zA-Z-]*)?:lambda:[a-z]{2}(-gov)?-[a-z]+-\d{1}:\d{12}:function:[a-zA-Z0-9-_]+(:(\$LATEST|[a-zA-Z0-9-_]+))?


The UTC time string indicating the last time the event mapping was updated.

Type: Timestamp


The result of the last AWS Lambda invocation of your Lambda function. This value will be null if an SQS queue is the event source.

Type: String


The state of the event source mapping. It can be Creating, Enabled, Disabled, Enabling, Disabling, Updating, or Deleting.

Type: String


The reason the event source mapping is in its current state. It is either user-requested or an AWS Lambda-initiated state transition.

Type: String


The AWS Lambda assigned opaque identifier for the mapping.

Type: String



One of the parameters in the request is invalid. For example, if you provided an IAM role for AWS Lambda to assume in the CreateFunction or the UpdateFunctionConfiguration API, that AWS Lambda is unable to assume you will get this exception.

HTTP Status Code: 400


The operation conflicts with the resource's availability. For example, you attempted to update an EventSoure Mapping in CREATING, or tried to delete a EventSoure mapping currently in the UPDATING state.

HTTP Status Code: 400


The resource (for example, a Lambda function or access policy statement) specified in the request does not exist.

HTTP Status Code: 404


The AWS Lambda service encountered an internal error.

HTTP Status Code: 500


HTTP Status Code: 429

See Also

For more information about using this API in one of the language-specific AWS SDKs, see the following: