how to hot load a new version rabbitmq source code

[hzhang7]

can I hot load a new version rabbitmq source code when I change some code?
I have tried rabbitmqctl eval "code:load_file(MODULE)." but after i load_file, rabbitmq terminated.

[lukebakken]

In general this is not supported. @mkuratczyk may have some tricks up his sleeves, though.

[mkuratczyk]

With the caveat that this is strictly for development purposes, yes, you can, although in some cases it's not sufficient (eg. if you change initialization code of a gen_server process, you will need to restart it after loading the new code). There are multiple ways to achieve that - manually or with erlang_ls: https://github.com/rabbitmq/contribute/wiki/Bazel#hot-code-reloading.

Manually, it's mostly about:

1. Starting the broker in a dev mode (-c dbg with bazel, I don't remember how to do that with make)
2. c(module). from the shell

I've never seen that terminate RabbitMQ.

With erlang_ls, you can have it reload the module on file save in your editor (it's also possible to set it up with just your editor, ultimately it's the same c(module). call).

[hzhang7]

thx a lot, I will try the way you mentioned above.