Pending response rejected since connection got disposed + (Mix.Error) Could not compile dependency

[matisnape]

This is a long story, starting with me trying to fix Go to definition. I've managed to fix the standard library, but not my project library.

I noticed then, that ElixirLS, at version 0.27.1, breaks on this

[Error - 16:59:01] Process #PID<0.229.0> raised an exception
** (Mix.Error) Could not compile dependency :rabbit_common, "/Users/anks/.asdf/installs/elixir/1.17.3-otp-26/.mix/elixir/1-17/rebar3 bare compile --paths /Users/anks/projects//integrations/be/.elixir_ls/build/test/lib/*/ebin" command failed. Errors may have been logged above. You can recompile this dependency with "mix deps.compile rabbit_common --force", update it with "mix deps.update rabbit_common" or clean it with "mix deps.clean rabbit_common"
    (mix 1.17.3) lib/mix.ex:588: Mix.raise/2
    (mix 1.17.3) lib/mix/tasks/deps.compile.ex:306: Mix.Tasks.Deps.Compile.do_command/5
    (mix 1.17.3) lib/mix/tasks/deps.compile.ex:211: Mix.Tasks.Deps.Compile.do_rebar3/2
    (mix 1.17.3) lib/mix/tasks/deps.compile.ex:93: anonymous fn/4 in Mix.Tasks.Deps.Compile.compile/2
    (elixir 1.17.3) lib/enum.ex:1703: Enum."-map/2-lists^map/1-1-"/2
    (mix 1.17.3) lib/mix/tasks/deps.compile.ex:77: Mix.Tasks.Deps.Compile.compile/2
    (mix 1.17.3) lib/mix/tasks/deps.loadpaths.ex:87: Mix.Tasks.Deps.Loadpaths.deps_check/2
    (mix 1.17.3) lib/mix/tasks/deps.loadpaths.ex:48: Mix.Tasks.Deps.Loadpaths.run/1
    (mix 1.17.3) lib/mix/task.ex:495: anonymous fn/3 in Mix.Task.run_task/5
    (mix 1.17.3) lib/mix/tasks/loadpaths.ex:37: Mix.Tasks.Loadpaths.run/1
    (mix 1.17.3) lib/mix/task.ex:495: anonymous fn/3 in Mix.Task.run_task/5
    (mix 1.17.3) lib/mix/tasks/compile.ex:153: Mix.Tasks.Compile.run/1
    (mix 1.17.3) lib/mix/task.ex:495: anonymous fn/3 in Mix.Task.run_task/5
    (language_server 0.25.0) lib/language_server/build.ex:442: ElixirLS.LanguageServer.Build.run_mix_compile/1
    (language_server 0.25.0) lib/language_server/build.ex:80: anonymous fn/3 in ElixirLS.LanguageServer.Build.build/3
    (stdlib 6.2) timer.erl:595: :timer.tc/2

I've tried resolving this following this comment: JakeBecker/elixir-ls#71 (comment)

but then ElixirLS stopped starting at all, getting the following error:

Running /Users/anks/.vscode/extensions/jakebecker.elixir-ls-0.27.1/elixir-ls-release/launch.sh
Preferred shell is zsh, relaunching
Looking for asdf install
asdf executable found at /opt/homebrew/bin/asdf. Setting ASDF_DIR=/opt/homebrew/opt/asdf/libexec and adding /opt/homebrew/opt/asdf/libexec/shims to PATH.
[Error - 16:30:31] Server process exited with code 1.
[Error - 16:30:31] Server initialization failed.
  Message: Pending response rejected since connection got disposed
  Code: -32097 
[Info  - 16:30:31] Connection to server got closed. Server will restart.
true
[Error - 16:30:31] ElixirLS - api client: couldn't create connection to server.
  Message: Pending response rejected since connection got disposed
  Code: -32097 

I've then checked ps axu | grep elixir and it no longer produces a process with -extra /Users/anks/.vscode/extensions/jakebecker.elixir-ls-0.27.1/elixir-ls-release/launch.exs

Downgrading to 0.26.4 fixes the connection problem (extension shows in the ps axu | grep elixir, but gets me back to this error (plus Go to definition no longer works):

===> Compiling src/rabbit_heartbeat.erl failed
rabbit_heartbeat.erl:22:39: syntax error before: 'maybe'

rabbit_heartbeat.erl:20:2: type heartbeaters() undefined
rabbit_heartbeat.erl:32:13: type heartbeaters() undefined
rabbit_heartbeat.erl:38:13: type heartbeaters() undefined
rabbit_heartbeat.erl:49:21: type heartbeaters() undefined
rabbit_heartbeat.erl:50:22: type heartbeaters() undefined

[Error - 18:22:12] Process #PID<0.437.0> raised an exception
** (Mix.Error) Could not compile dependency :rabbit_common, "/Users/anks/.asdf/installs/elixir/1.16.2-otp-26/.mix/elixir/1-16/rebar3 bare compile --paths /Users/anks/projects/integrations/.elixir_ls/build/test/lib/*/ebin" command failed. Errors may have been logged above. You can recompile this dependency with "mix deps.compile rabbit_common --force", update it with "mix deps.update rabbit_common" or clean it with "mix deps.clean rabbit_common"
    (mix 1.16.2) lib/mix.ex:580: Mix.raise/2
    (mix 1.16.2) lib/mix/tasks/deps.compile.ex:306: Mix.Tasks.Deps.Compile.do_command/5
    (mix 1.16.2) lib/mix/tasks/deps.compile.ex:211: Mix.Tasks.Deps.Compile.do_rebar3/2
    (mix 1.16.2) lib/mix/tasks/deps.compile.ex:93: anonymous fn/4 in Mix.Tasks.Deps.Compile.compile/2
    (elixir 1.16.2) lib/enum.ex:1700: Enum."-map/2-lists^map/1-1-"/2
    (mix 1.16.2) lib/mix/tasks/deps.compile.ex:77: Mix.Tasks.Deps.Compile.compile/2
    (mix 1.16.2) lib/mix/tasks/deps.loadpaths.ex:87: Mix.Tasks.Deps.Loadpaths.deps_check/2
    (mix 1.16.2) lib/mix/tasks/deps.loadpaths.ex:48: Mix.Tasks.Deps.Loadpaths.run/1
    (mix 1.16.2) lib/mix/task.ex:478: anonymous fn/3 in Mix.Task.run_task/5
    (mix 1.16.2) lib/mix/tasks/loadpaths.ex:37: Mix.Tasks.Loadpaths.run/1
    (mix 1.16.2) lib/mix/task.ex:478: anonymous fn/3 in Mix.Task.run_task/5
    (mix 1.16.2) lib/mix/tasks/compile.ex:153: Mix.Tasks.Compile.run/1
    (mix 1.16.2) lib/mix/task.ex:478: anonymous fn/3 in Mix.Task.run_task/5
    (language_server 0.26.2) lib/language_server/build.ex:441: ElixirLS.LanguageServer.Build.run_mix_compile/1
    (language_server 0.26.2) lib/language_server/build.ex:80: anonymous fn/3 in ElixirLS.LanguageServer.Build.build/3
    (stdlib 6.2) timer.erl:595: :timer.tc/2

I have 2 projects with different asdf setups from .tool-versions (I actually have more, but tested only on those 2)

One:

elixir          1.16.2-otp-26
erlang          26.2.3

Second:

elixir          1.17.3-otp-26
erlang          26.2.5.6

I've reinstalled Elixir and Erlang in one of the projects, to no avail.
fetchDeps is set to false

I'm on Apple M1 Pro with Sonoma 14.4. I have the same issue on VSCode and Cursor.

Are there any other steps I could follow to resolve this?

[lukaszsamson]

You are using rabbit deps incompatible with your otp version

[matisnape]

mix.lock in both has rabbit_common with 3.12.14 which is supported by OTP 26 🤔 https://github.com/rabbitmq/rabbitmq-server/blob/v3.12.x/release-notes/3.12.14.md
I don't have problems with compiling those apps and starting a server.

But let's disregard Rabbit, because it applies to downgraded version of ElixirLS.
I'd like to use version 0.27.1 but cannot create connection to server - surely this is not happening because of outdated Rabbit deps?

[matisnape]

Resolved the issue with rabbit_common on 0.26.4 - indeed, it was OTP, because which erl produced homebrew version. After reshim ElixirLS compiles. However, 0.27.1 is stuck on Pending response rejected since connection got disposed, so I will stay on 0.26.4.

[michalwski]

Same thing for me. After the update all I saw in nvim LSP logs was

[ERROR][2025-03-17 12:55:51] .../vim/lsp/rpc.lua:770    "rpc"   "/Users/michalpiotrowski/projects/elixir-ls/release/language_server.sh" "stderr"        "ELS_INSTALL_PREFIX is set, running /Users/michalpiotrowski/projects/elixir-ls/release/launch.sh\n"
[ERROR][2025-03-17 12:55:51] .../vim/lsp/rpc.lua:770    "rpc"   "/Users/michalpiotrowski/projects/elixir-ls/release/language_server.sh" "stderr"        "Preferred shell is zsh, relaunching\n"
[ERROR][2025-03-17 12:55:51] .../vim/lsp/rpc.lua:770    "rpc"   "/Users/michalpiotrowski/projects/elixir-ls/release/language_server.sh" "stderr"        "Looking for asdf install\nasdf executable found at /opt/homebrew/bin/asdf. Setting ASDF_DIR=/opt/homebrew/opt/asdf/libexec and adding /shims to PATH.\n"

And nothing else, the LSP didn't start.

I ended up reverting to commit eddd6a44.

My first attempt was to revert to 5737e71e

Something merged between eddd6a44 and 5737e71e breaks starting the server.

[lukaszsamson]

@michalwski this looks like another case of the issues with asdf mentioned in #1157

Looking for asdf install\nasdf executable found at /opt/homebrew/bin/asdf. Setting ASDF_DIR=/opt/homebrew/opt/asdf/libexec and adding /shims to PATH.\n

[lukaszsamson]

I released v0.27.2 which should resolve asdf 0.16 issues