log query params in query frontend when error

Signed-off-by: Ben Ye <[email protected]>

Author: yeya24

pkg/frontend/transport/handler.go

@@ -135,8 +135,11 @@ func (f *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	startTime := time.Now()
 	resp, err := f.roundTripper.RoundTrip(r)
 	queryResponseTime := time.Since(startTime)
-
 	if err != nil {
+		if f.cfg.QueryStatsEnabled {
+			queryString = f.parseRequestQueryString(r, buf)
+			f.reportQueryStats(r, queryString, queryResponseTime, stats)
+		}
 		writeError(w, err)
 		return
 	}