From 27afecb3acaf4ebced6e1d2c7a006ba5fd12716b Mon Sep 17 00:00:00 2001
From: k32 <10274441+k32@users.noreply.github.com>
Date: Thu, 4 Nov 2021 13:45:29 +0100
Subject: [PATCH] fix(emqx_connection): Introduce backpressure while sending
 data

Fixes #5494
---
 src/emqx_connection.erl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/emqx_connection.erl b/src/emqx_connection.erl
index ab91c02b4..b8d1c485d 100644
--- a/src/emqx_connection.erl
+++ b/src/emqx_connection.erl
@@ -702,7 +702,7 @@ send(IoData, #state{transport = Transport, socket = Socket, channel = Channel})
     ok = emqx_metrics:inc('bytes.sent', Oct),
     inc_counter(outgoing_bytes, Oct),
     emqx_congestion:maybe_alarm_conn_congestion(Socket, Transport, Channel),
-    case Transport:async_send(Socket, IoData, [nosuspend]) of
+    case Transport:async_send(Socket, IoData, []) of
         ok -> ok;
         Error = {error, _Reason} ->
             %% Send an inet_reply to postpone handling the error