halostatue
IEx freezes on Heroku
I’ve got an Elixir application running in Heroku that will no longer successfully run an IEx shell (e.g., heroku run -a myapp iex -S mix). It basically refuses to accept any input. We’re currently running on Elixir 1.8.2, but I believe that IEx stopped working sometime around 1.7. I’m not really sure what it is (we have a number of dependencies, but none of these would seem to be the problem). It doesn’t matter whether I am doing iex -S mix from heroku run directly or inside of a heroku run bash command.
Has anyone had anything similar and know of any solutions that don’t involve leaving Heroku?
Marked As Solved
halostatue
I think that’s it. It turns out that, on Heroku, import_file_if_available "~/.iex.exs" results in an infinite loop, and as it’s a compile-time macro, I don’t think that there’s a way to prevent it from bodging up Heroku if you want to take advantage of an optional user-level .iex.exs. Thanks!
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halostatue
It’s pretty much that simple, with the exception of import_file_if_available "~/.iex.exs". As soon as I remove that, I (eventually) get the interactive prompt. Before I remove that, I never get the interactive prompt.
I’ve filed an issue with Elixir: https://github.com/elixir-lang/elixir/issues/9363
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