# 2021-04-16-13:42:57+0800 apply 5.0 hotfix for cluster 1379210403782856704

- Cause: https://pingcap.zendesk.com/agent/tickets/188
- Operation:

```bash
# take a backup of current tc
kubectl get tc -n  tidb1379210403782856704 -o yaml > tc_backup.yaml

# edit target tidbcluster resource, update the .spec.tidb.version field to v5.0.0-20210415
kubectl edit tc -n tidb1379210403782856704

# wait the upgrade complete
kubectl get po -n  tidb1379210403782856704 --watch
```

- Impact: the tidb-servers will be rolling-updated, client's connections maybe impacted
- Recovery Operation: apply the `tc_backup.yaml` back to the cluste
- Time window: 13:46~13:50 CST, April 16