- Introduced a new WAL implementation that breaks forward compatibility and added APIs for per‑target metric metadata, rule management, and persistent alert state
- Reduced default remote‑write retries, removed the /heap endpoint, showed rule evaluation errors in UI, and added throttling for alert resends
- Fixed multiple bugs in service discovery, PromQL calculations, SD configurations, and response encoding
2.4.0 / 2018-09-11
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