From 27acff1b69a350579748a84c782029e5cfecdd9c Mon Sep 17 00:00:00 2001
From: Siyuan Miao <i@xswan.net>
Date: Fri, 13 Jun 2025 00:33:43 +0200
Subject: [PATCH] fix(timesync): queryMultipleHttp hanging if all servers are
 unreachable

---
 internal/timesync/http.go | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/internal/timesync/http.go b/internal/timesync/http.go
index 3a51463..ff0668a 100644
--- a/internal/timesync/http.go
+++ b/internal/timesync/http.go
@@ -95,16 +95,27 @@ func (t *TimeSync) queryMultipleHttp(urls []string, timeout time.Duration) (now
 			} else if errors.Is(err, context.Canceled) {
 				metricHttpCancelCount.WithLabelValues(url).Inc()
 				metricHttpTotalCancelCount.Inc()
+				results <- nil
 			} else {
 				scopedLogger.Warn().
 					Str("error", err.Error()).
 					Int("status", status).
 					Msg("failed to query HTTP server")
+				results <- nil
 			}
 		}(url)
 	}
 
-	return <-results
+	for range urls {
+		result := <-results
+		if result == nil {
+			continue
+		}
+		now = result
+		return
+	}
+
+	return
 }
 
 func queryHttpTime(