boost asio async_connect success after close

Question

Single-threaded application.

It happens not every time, only after 1.5 hours of high load.

1. tcp::socket::async_connect
2. tcp::socket::close (by deadl

Answer 1

I accept twsansbury's answer, just want to add some more info.

About shutdown():

void async_recv_handler( boost::system::error_code ec_recv, std::size_t count )
{
    if ( !m_socket.is_open() )
        return; // first time don't trust to ec_recv
    if ( ec_recv )
    {
        // oops, we have error
        // log
        // close
        return;
    }
    // seems that we are just fine, no error in ec_recv, we can gracefully shutdown the connection
    // but shutdown may fail! this check is working for me
    boost::system::error_code ec_shutdown;
    // second time don't trusting to ec_recv
    m_socket.shutdown( t, ec_shutdown );
    if ( !ec_shutdown )
        return;
    // this error code is expected
    if ( ec_shutdown == boost::asio::error::not_connected )
       return;
    // other error codes are unexpected for me
    // log << ec_shutdown.message()
    throw boost::system::system_error(ec_shutdown);
}