What is Resilient Event Ingestion?

Resilient Event Ingestion is a feature for our event ingestion pipeline that prevents permanent data loss during authentication outages. When LaunchDarkly's authentication dependencies become unavailable, such as in the case of the October 20th AWS incident, Resilient Event Ingestion automatically writes raw SDK events to S3 instead of dropping them. Once services recover, we can replay these events and make them available.

This is a key part of our post-October 20th resilience improvements — ensuring that even during major provider outages, customer events are preserved and eventually processed.

How does it work?

Resilient Event Ingestion has two key features:

• Automatic failover: Any request that would have returned a 5xx error to the client is instead stored in S3 and acknowledged with a 202. No manual intervention is required to ensure preservation of data
• Replaying data: once authentication is recovered, we can replay the stored data to make it available in the LaunchDarkly app

Availability & Who's it for

This is an infrastructure-level improvement for all LaunchDarkly customers across all regions. No customer action is required.