From 64b427a38800fe7fc578d6d5c7a3af0101a86935 Mon Sep 17 00:00:00 2001
From: David Zhao <david@davidzhao.com>
Date: Thu, 3 Dec 2020 23:22:59 -0800
Subject: [PATCH] don't remove tracks if client is closed

---
 pkg/rtc/track.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkg/rtc/track.go b/pkg/rtc/track.go
index 38a2017ca..563079baa 100644
--- a/pkg/rtc/track.go
+++ b/pkg/rtc/track.go
@@ -78,6 +78,9 @@ func (t *Track) AddSubscriber(participant *Participant) error {
 		delete(t.forwarders, participant.ID())
 		t.lock.Unlock()
 
+		if participant.peerConn.ConnectionState() == webrtc.PeerConnectionStateClosed {
+			return
+		}
 		if err := participant.peerConn.RemoveTrack(rtpSender); err != nil {
 			logger.GetLogger().Warnw("could not remove mediaTrack from forwarder",
 				"participant", participant.ID(),