[MM-45990] log JSON parsing errors in API4 (#20724)

api4/config.go

@@ -78,7 +78,7 @@ func getConfig(c *Context, w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	if err := json.NewEncoder(w).Encode(cfg); err != nil {
-		mlog.Warn("Error while writing response", mlog.Err(err))
+		c.Logger.Warn("Error while writing response", mlog.Err(err))
 	}
 }
 
@@ -220,7 +220,7 @@ func updateConfig(c *Context, w http.ResponseWriter, r *http.Request) {
 	}
 
 	if err := json.NewEncoder(w).Encode(cfg); err != nil {
-		mlog.Warn("Error while writing response", mlog.Err(err))
+		c.Logger.Warn("Error while writing response", mlog.Err(err))
 	}
 }
 
@@ -370,7 +370,7 @@ func patchConfig(c *Context, w http.ResponseWriter, r *http.Request) {
 	}
 
 	if err := json.NewEncoder(w).Encode(cfg); err != nil {
-		mlog.Warn("Error while writing response", mlog.Err(err))
+		c.Logger.Warn("Error while writing response", mlog.Err(err))
 	}
 }