Increased latency with webhooks
This summary is created by Generative AI and may differ from the actual content.
Overview
Increased latency with webhooks between 15:27 UTC and 16:23 UTC on June 15, 2026, with average end-to-end delivery latency peaking at approximately 8.8 minutes. No webhook deliveries were lost — delayed events were queued and delivered once processing recovered.
Impact
Webhook events were delivered later than normal, with average end-to-end delivery latency peaking at approximately 8.8 minutes. No webhook deliveries were lost.
Trigger
Temporary throughput constraint in an internal event-processing system
Detection
Reports of degraded performance for Webhooks were investigated
Resolution
Restarted the affected pipeline service, after which throughput recovered and the backlog fully drained by approximately 16:29 UTC. Webhook delivery latency returned to normal, the incident was mitigated at 16:39 UTC, and fully resolved at 17:37 UTC.
Root Cause
Temporary throughput constraint in an internal event-processing system that moves webhook events through GitHub's delivery pipeline.