Why is client getting EOF on async_write? - c++

Question

I'm writing an asynchronous server using boost::asio. I changed boost HTTP server example to use only simple protobufs. Now client gets libc++abi.dylib: terminating with uncaught exception of type boost::wrapexcept<boost::system::system_error>: read: End of file error when server's trying to send message using async_write.
I have tried sync and async clients, different types of buffers but the problem is still there. All the things are going well until async_write.
void TConnection::DoRead() {
std::cout << "Reading data" << std::endl;
auto self(shared_from_this());
Socket.async_read_some(boost::asio::buffer(Buffer),
[this, self](boost::system::error_code ec, std::size_t bytes_transferred)
{
if (!ec) {
TRequestParser::ResultType result;
TMessage request;
request.Parse(Buffer.data(), bytes_transferred);
Reply = MasterPtr->HandleMessange(request);
std::cout << "Replying: " << Reply.Content << std::endl;
DoWrite();
} else if (ec != boost::asio::error::operation_aborted) {
ConnectionManager.Stop(shared_from_this());
}
});
}
void TConnection::DoWrite() {
std::cout << "Writing data" << std::endl;
auto self(shared_from_this());
std::cout << "Replying2: " << Reply.Content << std::endl;
Reply.ToStreamBuf(&Streambuf);
std::cout << "Now I'm gonna write" << std::endl;
std::cout << Streambuf.size() << std::endl;
boost::asio::async_write(Socket, Streambuf,
[this, self](boost::system::error_code ec, std::size_t)
{
std::cout << "Oh, handled" << std::endl;
if (!ec)
{
// Initiate graceful connection closure.
boost::system::error_code ignored_ec;
Socket.shutdown(boost::asio::ip::tcp::socket::shutdown_both,
ignored_ec);
}
if (ec != boost::asio::error::operation_aborted)
{
ConnectionManager.Stop(shared_from_this());
}
});
}
What I'm doing wrong?