Library working in dev but crashes in a docker release

[froy001]

I have open_api_spex working in development.
My application is an API only phoenix application

In production I am using mix release and docker. The dockerfile is given below:

# ---- Build Stage ----
FROM erlang:22-alpine AS app_builder

# Set environment variables for building the application
ENV MIX_ENV=prod \
    TEST=1 \
    LANG=C.UTF-8

# Fetch the latest version of Elixir (once the 1.9 docker image is available you won't have to do this)
RUN set -xe \
  && apk add curl make gcc build-base --update-cache \
  && ELIXIR_DOWNLOAD_URL="https://github.com/elixir-lang/elixir/archive/v1.10.4.tar.gz" \
  && ELIXIR_DOWNLOAD_SHA256="8518c78f43fe36315dbe0d623823c2c1b7a025c114f3f4adbb48e04ef63f1d9f" \
  && curl -fSL -o elixir-src.tar.gz $ELIXIR_DOWNLOAD_URL \
  && echo "$ELIXIR_DOWNLOAD_SHA256  elixir-src.tar.gz" | sha256sum -c - \
  && mkdir -p /usr/local/src/elixir \
  && tar -xzC /usr/local/src/elixir --strip-components=1 -f elixir-src.tar.gz \
  && rm elixir-src.tar.gz \
  && cd /usr/local/src/elixir \
  && make install clean

# Install hex and rebar
RUN mix local.hex --force && \
    mix local.rebar --force

# Create the application build directory
RUN mkdir /app
WORKDIR /app

# Copy over all the necessary application files and directories
COPY config ./config
COPY lib ./lib
COPY priv ./priv
COPY rel ./rel
COPY mix.exs .
COPY mix.lock .

# Fetch the application dependencies and build the application
RUN mix deps.get
RUN mix deps.compile
RUN mix phx.digest
RUN mix release

# ---- Application Stage ----
FROM alpine AS app

ENV LANG=C.UTF-8

# Install openssl
RUN apk update && apk add openssl ncurses-libs postgresql-client && \
  rm -rf /var/cache/apk/*

# Copy over the build artifact from the previous step and create a non root user
RUN adduser -h /home/app -D app
WORKDIR /home/app
COPY --from=app_builder /app/_build .
RUN chown -R app: ./prod
USER app

COPY entrypoint.sh .

# Run the Phoenix app
CMD ["./entrypoint.sh"

When trying to access any of the endpoints after building and deploying the docker image I am getting the following error which I don't understand:

2020-07-22T06:37:44.953317157Z Request: GET /api/swaggerui
2020-07-22T06:37:44.953321116Z ** (exit) an exception was raised:
2020-07-22T06:37:44.953325320Z     ** (MatchError) no match of right hand side value: {:error, :chunk_not_found}
2020-07-22T06:37:44.953329616Z         (open_api_spex 3.7.0) lib/open_api_spex/controller.ex:155: OpenApiSpex.Controller.get_docs/2
2020-07-22T06:37:44.953345169Z         (open_api_spex 3.7.0) lib/open_api_spex/controller.ex:139: OpenApiSpex.Controller.__api_operation__/2
2020-07-22T06:37:44.953349441Z         (open_api_spex 3.7.0) lib/open_api_spex/path_item.ex:77: anonymous fn/1 in OpenApiSpex.PathItem.from_valid_routes/1
2020-07-22T06:37:44.953352924Z         (elixir 1.10.4) lib/enum.ex:1396: Enum."-map/2-lists^map/1-0-"/2
2020-07-22T06:37:44.953356690Z         (open_api_spex 3.7.0) lib/open_api_spex/path_item.ex:76: OpenApiSpex.PathItem.from_valid_routes/1
2020-07-22T06:37:44.953360553Z         (open_api_spex 3.7.0) lib/open_api_spex/paths.ex:23: anonymous fn/1 in OpenApiSpex.Paths.from_router/1
2020-07-22T06:37:44.953363975Z         (elixir 1.10.4) lib/enum.ex:1400: anonymous fn/3 in Enum.map/2
2020-07-22T06:37:44.953367679Z         (stdlib 3.12.1) maps.erl:232: :maps.fold_1/3

I am not sure what to do with this error. Would appreciate any help

[velimir]

I think this is related to #242.
As a workaround you can try to use distillery until the Elixir with the fix is released.

[froy001]

@velimir thanks. I will look into it.

distillery is a hassle I'd rather not go through :).

[velimir]

Alternatively you can build Elixir from the HEAD and give the new :strip_beams a go.

[mbuhot]

Yes in the short term you'll need to disable beam stripping for your release.