Kyo Nguyen

Here you are [system-design-primer.pdf](https://github.com/donnemartin/system-design-primer/files/875541/system-design-primer.pdf)

I just generated the latest PDF here [system-design-primer.pdf](https://github.com/donnemartin/system-design-primer/files/6987980/system-design-primer.pdf)

@mkenney Never mind. I've not much time but I can help you fix this bug on the `socket` package only.

There are some confusions on the code. What is purpose of `Stop, Disconnect` functions ? Please clarify which purpose for them, to make the code cleaner

A lot of logging the good for debug, But it make the code a bit harder for reading.

I think the pain point is how you using muxer. It’s might create a lot of deadlocks in the lib

@Phaeilo You need to ping to the NSQD server by your self. I don't know why the HEARTBEAT function is not working as expected. I did this workaround. It works....

@trmaphi This error appears to be the same as the one we encountered with Goloop previously. I guess it comes from the network issue.

I don't have an M1 to test. LOL

@tiendq I've opened a PR to fix this issue. @trmaphi When running docker-compose, I got this error.  Is there a new change on the contracts?