From 948875643737ad0567c7690689b376daf29e9469 Mon Sep 17 00:00:00 2001
From: Anna Shaleva <shaleva.ann@nspcc.ru>
Date: Thu, 23 Jun 2022 17:41:28 +0300
Subject: [PATCH] rpc: extend error log message for failed RPC requests

Message is always non-empty; Data is allowed to be empty.
---
 pkg/rpc/server/server.go | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/pkg/rpc/server/server.go b/pkg/rpc/server/server.go
index 91eabe359..567707d76 100644
--- a/pkg/rpc/server/server.go
+++ b/pkg/rpc/server/server.go
@@ -2260,7 +2260,10 @@ func (s *Server) packResponse(r *request.In, result interface{}, respErr *respon
 // logRequestError is a request error logger.
 func (s *Server) logRequestError(r *request.Request, jsonErr *response.Error) {
 	logFields := []zap.Field{
-		zap.String("cause", jsonErr.Data),
+		zap.Int64("code", jsonErr.Code),
+	}
+	if len(jsonErr.Data) != 0 {
+		logFields = append(logFields, zap.String("cause", jsonErr.Data))
 	}
 
 	if r.In != nil {