From 6b08727993d03980c8c70d70090f2d4d55146e9f Mon Sep 17 00:00:00 2001
From: sjlleo <sjlleo001@gmail.com>
Date: Wed, 18 May 2022 21:19:19 +0800
Subject: [PATCH] =?UTF-8?q?update:=20=E6=9A=82=E4=B8=8D=E5=85=B3=E9=97=ADh?=
 =?UTF-8?q?opCh=E7=AE=A1=E9=81=93=EF=BC=8C=E5=8E=9F=E5=9B=A0=E5=BE=85?=
 =?UTF-8?q?=E6=9F=A5?=
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Content-Transfer-Encoding: 8bit

---
 trace/tcp.go | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/trace/tcp.go b/trace/tcp.go
index 71c83e34..33614025 100644
--- a/trace/tcp.go
+++ b/trace/tcp.go
@@ -218,12 +218,15 @@ func (t *TCPTracer) send(ttl int) error {
 	hopCh := make(chan Hop)
 	t.inflightRequest[int(sequenceNumber)] = hopCh
 	t.inflightRequestLock.Unlock()
-	defer func() {
-		t.inflightRequestLock.Lock()
-		close(hopCh)
-		delete(t.inflightRequest, srcPort)
-		t.inflightRequestLock.Unlock()
-	}()
+	/*
+		// 关了会有问题，偶见 panic: send on closed channel 报错
+		defer func() {
+			t.inflightRequestLock.Lock()
+			close(hopCh)
+			delete(t.inflightRequest, srcPort)
+			t.inflightRequestLock.Unlock()
+		}()
+	*/
 	select {
 	case <-t.ctx.Done():
 		return nil