Compilation fails in file lib/nebulex/rpc.ex

[johannesE]

$ mix compile
==> nebulex
Compiling 44 files (.ex)

== Compilation error in file lib/nebulex/rpc.ex ==
** (ArgumentError) argument error

could not compile dependency :nebulex, "mix compile" failed. You can recompile this dependency with "mix deps.compile nebulex", update it with "mix deps.update nebulex" or clean it with "mix deps.clean nebulex"

config.exs

config :ex_owm, ExOwm.Cache,
  gc_interval: :timer.hours(1),
  max_size: 1_000,
  # 20MB
  allocated_memory: 20_000_000,
  gc_cleanup_min_timeout: :timer.seconds(10),
  gc_cleanup_max_timeout: :timer.minutes(10),
  backend: :shards,
  stats: true

defmodule ExOwm.Cache do
  use Nebulex.Cache, otp_app: :ex_owm, adapter: Nebulex.Adapters.Local
end

mix.exs

defmodule ExOwm.Mixfile do
  use Mix.Project
  def project do
    [...]
  end
  # Run "mix help compile.app" to learn about applications.
  def application do
    [
      extra_applications: [:logger],
      mod: {ExOwm.Application, []}
    ]
  end
  # Run "mix help deps" to learn about dependencies.
  defp deps do
    [
      {:httpoison, "~> 1.7"},
      {:jason, "~> 1.2"},
      {:nebulex, "~> 2.0"},
      {:ex_doc, "~> 0.22", only: :dev, runtime: false},
      {:credo, "~> 1.4", only: [:dev, :test], runtime: false}
    ]
  end
end

Nebulex Version is 2.1.0 according to mix.lock
I tried to find out more, but this is really weird. I'm running this on ubuntu with elixir 1.9. Maybe I'm lacking some dependencies? I tried mix clean etc. Any tipps?

[cabol]

Hey 👋 ! Yeah it is weird, I hadn't seen that error when using Nebulex before. Anyway, I see you are using :shards as backend (backend: :shards), then you need to add :shards to the dependencies {:shards, "~> 1.0"}, but I'm not sure that is the cause of the error. What Elixir and OTP version are you using?

[johannesE]

I added the shards dependency. That worked, but did not fix the issue.

$ mix compile
===> Compiling shards
==> nebulex
Compiling 44 files (.ex)

== Compilation error in file lib/nebulex/rpc.ex ==
** (ArgumentError) argument error

could not compile dependency :nebulex, "mix compile" failed. You can recompile this dependency with "mix deps.compile nebulex", update it with "mix deps.update nebulex" or clean it with "mix deps.clean nebulex"

$ elixir -v
Erlang/OTP 23 [erts-11.2] [source] [64-bit] [smp:8:8] [ds:8:8:10] [async-threads:1] [hipe]

Elixir 1.9.4 (compiled with Erlang/OTP 20)

[johannesE]

The project is actually open source, so it is available here: https://github.com/johannesE/ex_owm

[cabol]

Ok, will try to reproduce the issue.

[cabol]

@johannesE I think the issue could be because you are using OTP 20, and Nebulex uses persistent_term which is included since OTP 21. Could you try with a higher OTP version, at least 21?

[johannesE]

You are right. Upgrading to elixir 1.12.1 solved it. Sorry for taking your time with this.