Incident Library

Organisation

CyberAgent

CyberAgent · cyberagent

2 cases · 2016 to 2026

Root cause Capacity exhaustion1Operator error1
Component Database1Elasticsearch or OpenSearch1Jobs and CronJobs1
Contributing factor Unverified assumption1Automation amplification1Unreviewed defaults1Change with a delayed effect1
Symptom Data loss1High error rate1High latency1Memory pressure1

Cases

  1. IL-0435 Error rates rose as Aurora MySQL killed connections and declined queries to avoid OOM while load metrics stayed flatCyberAgent · 2026

    Root cause Capacity exhaustion

  2. IL-0434 Rolling restarts of a 30-node Elasticsearch 0.19 cluster after a host failure left 12 shards unassignedCyberAgent · 2016

    Root cause Operator error