Using the Event ID format (version 1.6.0 and above)edit
Version 1.6.0 introduces a new event ID format that prevents duplicate ID errors when a high volume of events is ingested to Elasticsearch. This new format combines a timestamp with data specific to the relevant AWS resource, extracted from the AWS Lambda event received by the forwarder.
The timestamp is used as a prefix for the ID, because identifiers that gradually increase over time generally result in better indexing performance in Elasticsearch, based on sorting order rather than completely random identifiers. For more information, please refer to this Elastic blog on event-based data.
If old events that are already published to Elasticsearch using a version of Elastic Serverless Forwarder before v1.6.0 are ingested again, they will be treated as new events and published to Elasticsearch as duplicates.