From 6e22499911a90e807c6655ca66d7df93ec6c7063 Mon Sep 17 00:00:00 2001
From: lance6716 <lance6716@gmail.com>
Date: Fri, 18 Nov 2022 10:19:47 +0800
Subject: [PATCH] Update br/pkg/lightning/lightning.go

Co-authored-by: D3Hunter <jujj603@gmail.com>
---
 br/pkg/lightning/lightning.go | 1 +
 1 file changed, 1 insertion(+)

diff --git a/br/pkg/lightning/lightning.go b/br/pkg/lightning/lightning.go
index 0f5b7b0e7f28c..af198f4fdea58 100644
--- a/br/pkg/lightning/lightning.go
+++ b/br/pkg/lightning/lightning.go
@@ -547,6 +547,7 @@ func (l *Lightning) Status() (finished int64, total int64) {
 }
 
 // Metrics returns the metrics of lightning.
+// it's inited during `run`, so might return nil.
 func (l *Lightning) Metrics() *metric.Metrics {
 	return l.metrics
 }