Incident Library

Component

Amazon ECS

Amazon ECS · ecs

3 cases · 2020 to 2026

Root cause Capacity exhaustion1Cloud provider outage1Dependency failure1
Contributing factor Automation amplification2Monitoring blind spot2Excessive blast radius1Ignored early signal1Unpatched known bug1Overlapping failures1Retry storm1
Symptom High error rate2High latency2Service outage2Cloud API rate limit exhausted1OOMKilled1Packet loss1
Organisation AssemblyAI1Canva1ITANDI1

Cases, by severity

  1. IL-0409 AssemblyAI's async and LLM Gateway APIs returned 5xx after its auth service could not get ENIs and scaled to zeroAssemblyAI · 2026

    Root cause Capacity exhaustion

  2. IL-0257 canva.com went down for about 50 minutes when 1.5 million requests per second OOM-killed every API Gateway taskCanva · 2024

    Root cause Dependency failure

  3. IL-0446 About 20% of requests to an ITANDI ECS service got ALB 5XX errors, apparently from one zone, right after a deployITANDI · 2020

    Root cause Cloud provider outage

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