Calehot98 Ticket Work

| Time (UTC) | Action / Observation | |------------|----------------------| | | Ticket logged – “Pricing API returns 500 for SKU 12345 in EU region.” | | 09:30 | Automated alert (Prometheus) shows CPU spikes on pods calehot‑v3‑* in eu-central-1 . | | 10:05 | Support reproduces error on staging – stack trace points to CacheProvider.get() throwing NullPointerException . | | 12:00 | Engineering triage identifies recent helm chart change (deployment v3.2.1‑rc2 ). | | 14:15 | Debug session reveals two concurrent threads writing to the same ConcurrentHashMap without proper synchronization – race condition. | | 16:00 | Temporary mitigation: disable cache refresh for affected pods; error rate drops from 27 % to < 1 %. | | Next Day (09:00) | Root cause analysis completed (see Section 4). | | Day 3 | Patch v3.2.1‑fix‑racing built, unit‑tested, and staged to dev . | | Day 5 | Rolling‑restart across all regions; monitoring confirms steady state. | | Day 7 | Ticket closed – “Resolved – Fixed underlying race condition, added regression test.” |

Best regards, [Your Name]