# Source: https://docs.datadoghq.com/ddsql_reference/data_directory/aws/aws.lambda_event_source_mapping.dataset.md

---
title: Lambda Event Source Mapping
description: Datadog, the leading service for cloud-scale monitoring.
breadcrumbs: Docs > DDSQL Reference > Data Directory > Lambda Event Source Mapping
---

# Lambda Event Source Mapping

Lambda Event Source Mapping in AWS connects an event source, such as an SQS queue, DynamoDB stream, or Kinesis stream, to a Lambda function. It automatically polls the source and invokes the function with new data, handling scaling and batching behind the scenes. This allows developers to process events in near real time without managing infrastructure or custom polling logic.

```
aws.lambda_event_source_mapping
```

## Fields

| Title                                    | ID   | Type          | Data Type                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           | Description |
| ---------------------------------------- | ---- | ------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ----------- |
| _key                                     | core | string        |
| account_id                               | core | string        |
| amazon_managed_kafka_event_source_config | core | json          | Specific configuration settings for an Amazon Managed Streaming for Apache Kafka (Amazon MSK) event source.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
| batch_size                               | core | int64         | The maximum number of records in each batch that Lambda pulls from your stream or queue and sends to your function. Lambda passes all of the records in the batch to the function in a single call, up to the payload limit for synchronous invocation (6 MB). Default value: Varies by service. For Amazon SQS, the default is 10. For all other services, the default is 100. Related setting: When you set BatchSize to a value greater than 10, you must set MaximumBatchingWindowInSeconds to at least 1.                                                                                                                                                                                                                                                                                                                                                                                      |
| bisect_batch_on_function_error           | core | bool          | (Kinesis, DynamoDB Streams, Amazon MSK, and self-managed Apache Kafka) If the function returns an error, split the batch in two and retry. The default value is false.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
| destination_config                       | core | json          | (Kinesis, DynamoDB Streams, Amazon MSK, and self-managed Apache Kafka) A configuration object that specifies the destination of an event after Lambda processes it.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
| document_db_event_source_config          | core | json          | Specific configuration settings for a DocumentDB event source.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
| event_source_arn                         | core | string        | The Amazon Resource Name (ARN) of the event source.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
| event_source_mapping_arn                 | core | string        | The Amazon Resource Name (ARN) of the event source mapping.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
| filter_criteria                          | core | json          | An object that defines the filter criteria that determine whether Lambda should process an event. For more information, see Lambda event filtering. If filter criteria is encrypted, this field shows up as null in the response of ListEventSourceMapping API calls. You can view this field in plaintext in the response of GetEventSourceMapping and DeleteEventSourceMapping calls if you have kms:Decrypt permissions for the correct KMS key.                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
| function_arn                             | core | string        | The ARN of the Lambda function.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
| function_response_types                  | core | array<string> | (Kinesis, DynamoDB Streams, Amazon MSK, self-managed Apache Kafka, and Amazon SQS) A list of current response type enums applied to the event source mapping.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
| last_modified                            | core | timestamp     | The date that the event source mapping was last updated or that its state changed.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
| last_processing_result                   | core | string        | The result of the event source mapping's last processing attempt.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
| maximum_batching_window_in_seconds       | core | int64         | The maximum amount of time, in seconds, that Lambda spends gathering records before invoking the function. You can configure MaximumBatchingWindowInSeconds to any value from 0 seconds to 300 seconds in increments of seconds. For streams and Amazon SQS event sources, the default batching window is 0 seconds. For Amazon MSK, Self-managed Apache Kafka, Amazon MQ, and DocumentDB event sources, the default batching window is 500 ms. Note that because you can only change MaximumBatchingWindowInSeconds in increments of seconds, you cannot revert back to the 500 ms default batching window after you have changed it. To restore the default batching window, you must create a new event source mapping. Related setting: For streams and Amazon SQS event sources, when you set BatchSize to a value greater than 10, you must set MaximumBatchingWindowInSeconds to at least 1. |
| maximum_record_age_in_seconds            | core | int64         | (Kinesis, DynamoDB Streams, Amazon MSK, and self-managed Apache Kafka) Discard records older than the specified age. The default value is -1, which sets the maximum age to infinite. When the value is set to infinite, Lambda never discards old records. The minimum valid value for maximum record age is 60s. Although values less than 60 and greater than -1 fall within the parameter's absolute range, they are not allowed                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
| maximum_retry_attempts                   | core | int64         | (Kinesis, DynamoDB Streams, Amazon MSK, and self-managed Apache Kafka) Discard records after the specified number of retries. The default value is -1, which sets the maximum number of retries to infinite. When MaximumRetryAttempts is infinite, Lambda retries failed records until the record expires in the event source.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
| parallelization_factor                   | core | int64         | (Kinesis and DynamoDB Streams only) The number of batches to process concurrently from each shard. The default value is 1.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
| queues                                   | core | array<string> | (Amazon MQ) The name of the Amazon MQ broker destination queue to consume.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
| scaling_config                           | core | json          | (Amazon SQS only) The scaling configuration for the event source. For more information, see Configuring maximum concurrency for Amazon SQS event sources.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
| self_managed_event_source                | core | json          | The self-managed Apache Kafka cluster for your event source.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
| self_managed_kafka_event_source_config   | core | json          | Specific configuration settings for a self-managed Apache Kafka event source.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
| source_access_configurations             | core | json          | An array of the authentication protocol, VPC components, or virtual host to secure and define your event source.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
| starting_position                        | core | string        | The position in a stream from which to start reading. Required for Amazon Kinesis and Amazon DynamoDB Stream event sources. AT_TIMESTAMP is supported only for Amazon Kinesis streams, Amazon DocumentDB, Amazon MSK, and self-managed Apache Kafka.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
| starting_position_timestamp              | core | timestamp     | With StartingPosition set to AT_TIMESTAMP, the time from which to start reading. StartingPositionTimestamp cannot be in the future.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
| state                                    | core | string        | The state of the event source mapping. It can be one of the following: Creating, Enabling, Enabled, Disabling, Disabled, Updating, or Deleting.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
| state_transition_reason                  | core | string        | Indicates whether a user or Lambda made the last change to the event source mapping.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
| tags                                     | core | hstore_csv    |
| topics                                   | core | array<string> | The name of the Kafka topic.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
| tumbling_window_in_seconds               | core | int64         | (Kinesis and DynamoDB Streams only) The duration in seconds of a processing window for DynamoDB and Kinesis Streams event sources. A value of 0 seconds indicates no tumbling window.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
| uuid                                     | core | string        | The identifier of the event source mapping.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |