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feat(metrics): add per-backend connection, error, protocol, and pool metrics with stale backend pruning

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Jürgen Kunz
2026-03-12 15:16:11 +00:00
parent 0380a957d0
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changelog.md
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# Changelog
## 2026-03-12 - 25.10.0 - feat(metrics)
add per-backend connection, error, protocol, and pool metrics with stale backend pruning
- tracks backend connection lifecycle, connect timing, protocol detection, pool hit/miss rates, handshake/request errors, and h2 fallback failures in Rust metrics
- exposes backend metrics through the TypeScript metrics adapter with backend listings, protocol lookup, and top error summaries
- prunes backend metrics for backends no longer referenced by active routes, including preserved-port targets expanded across listening ports
## 2026-03-11 - 25.9.3 - fix(rustproxy-http)
Evict stale HTTP/2 pooled senders and retry bodyless requests with fresh backend connections to avoid 502s