| Date / Time (UTC) | Task / Milestone | Description / Notes | Status |
|---|---|---|---|
| July 9, 2025 | 📣 User Notification Sent | Email alert sent to all users regarding planned downtime on July 5. | DONE |
| July 12, 2025 | 📦 Final Backup & Pre-checks | Full site backup, plugin compatibility validation, dry-run tested. | DONE |
| July 12, 2025 | 🛠 Final Plugin Builds | Rebuilt plugins for Gerrit 3.11.2 compatibility. | DONE |
| July 12, 2025 15:00 | 🚧 Start Maintenance Window | Site taken offline, migration started. | DONE |
| July 12, 2025 15:10 | 🔄 Migration Begins (2.16 → 3.11.2) | Incremental upgrades performed through required intermediate steps. | DONE |
| July 12, 2025 ~21:00 | 🔁 Index Rebuild & Configuration Updates | Reindexing data, updating config for 3.x, plugin re-deployment. | DONE |
| July 12, 2025 ~22:00 | ✅ Migration Complete | All services validated, site brought back online. | DONE |
| July 12, 2025 ~23:00 | 📬 Post-Maintenance Notification | Email sent confirming successful upgrade and any key changes. | DONE |
| July 13-19, 2025 | 🧪 Post-upgrade Monitoring & Support | Monitor logs, performance, address issues raised by users. | IN PROGRESS |
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