Why Send Failed

[18328594608]

Hello !
This is my code :
weakSession.lock()->loop->defer([=]{
if(!weakSession.lock())
return ;

        const  std::string msg = spMsg-> getUuid()+spMsg->getMsg();
        auto status = weakSession.lock()->wsPtr->send(msg, uWS::OpCode::TEXT);
        if (status != WsSocket::SendStatus::SUCCESS) {
            LOG_ERROR("Send Failed code = {}", status);
        }
    });

I keep having sending errors when sending too fast.
This may be related to the setting of maxBackpressure.
If this pressure is full. How should I handle this situation?

[18328594608]

wsPtr->getBufferedAmount() ,
Using this function, you find that you get larger and larger values, And it hasn't decreased. Why?