v0.32.7

src/proxy/forward/response.rs

@@ -22,16 +22,18 @@
             let elapsed = upstream_started.elapsed();
             let connect_failure = cause.is_connect();
             let detail = upstream_failure_detail(&cause, &active_backend, elapsed, connect_failure);
+            let failure_class =
+                upstream_health_error_class(&cause, connect_failure, &active_backend);
+            let graceful_h2_close = matches!(
+                failure_class,
+                "h2_graceful_goaway" | "h2_graceful_close"
+            );
             if let Some(exchange) = &exchange {
                 exchange.websocket_error("upstream_request_failed", "upstream_http_error");
                 *exchange.upstream_error.lock().unwrap_or_else(|e| e.into_inner()) = Some(detail.clone());
             }
             if let Some(lease) = &active_lease {
-                lease.error_detail(
-                    upstream_health_error_class(&cause, connect_failure, &active_backend),
-                    &detail,
-                    final_attempt_elapsed,
-                );
+                lease.error_detail(failure_class, &detail, final_attempt_elapsed);
             }
             if connect_failure {
                 tracing::warn!(
@@ -43,6 +45,17 @@
                     error = %detail,
                     "upstream connection failed"
                 );
+            } else if graceful_h2_close {
+                // Correlated GOAWAY(NO_ERROR) is expected connection churn. Keep
+                // failed requests visible as 502/access-log entries, but avoid
+                // repeating their verbose diagnostic at DEBUG severity.
+                tracing::trace!(
+                    backend = %active_backend.id,
+                    origin = %active_backend.origin,
+                    elapsed_ms = elapsed.as_millis(),
+                    error = %detail,
+                    "upstream H2 graceful close left an unrecovered request"
+                );
             } else {
                 tracing::debug!(
                     backend = %active_backend.id,