From 522b884697be634abf210f81a9d77b84de5c9e7f Mon Sep 17 00:00:00 2001
From: ziv <xiaozheng@alumni.tongji.edu.cn>
Date: Mon, 1 Aug 2022 17:43:59 +0800
Subject: [PATCH] remove useless code

---
 agent/metrics_reader.go | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/agent/metrics_reader.go b/agent/metrics_reader.go
index 6debad7..84f0241 100644
--- a/agent/metrics_reader.go
+++ b/agent/metrics_reader.go
@@ -15,8 +15,6 @@ import (
 	"flashcat.cloud/categraf/writer"
 )
 
-const agentHostnameLabelKey = "agent_hostname"
-
 var metricReplacer = strings.NewReplacer("-", "_", ".", "_", " ", "_", "'", "_", "\"", "_")
 
 type InputReader struct {
@@ -117,6 +115,9 @@ func (r *InputReader) gatherOnce() {
 }
 
 func (r *InputReader) forward(slist *types.SampleList) {
+	if slist == nil {
+		return
+	}
 	arr := slist.PopBackAll()
 	for i := 0; i < len(arr); i++ {
 		writer.PushQueue(arr[i])