Failed to compile: Unexpected end of JSON input when installing Alloy

[kerak19]

Hi. While installing Alloy on MacOS with the guide available at https://grafana.com/docs/alloy/latest/set-up/install/macos/ I've encountered an issue; the installation fails with following details:

brew install grafana/grafana/alloy
==> Auto-updating Homebrew...
Adjust how often this is run with HOMEBREW_AUTO_UPDATE_SECS or disable with
HOMEBREW_NO_AUTO_UPDATE. Hide these hints with HOMEBREW_NO_ENV_HINTS (see `man brew`).
==> Fetching grafana/grafana/alloy
==> Downloading https://github.com/grafana/alloy/archive/refs/tags/v1.5.0.tar.gz
Already downloaded: /Users/lukasz/Library/Caches/Homebrew/downloads/4bf992ce5c20569d3810b62b73e547fb1490d7f766881219f1cc870edb60915f--alloy-1.5.0.tar.gz
==> Installing alloy from grafana/grafana
==> yarn
==> yarn run build
Last 15 lines from /Users/lukasz/Library/Logs/Homebrew/alloy/02.yarn:
$ react-scripts build
Creating an optimized production build...
Browserslist: caniuse-lite is outdated. Please run:
  npx update-browserslist-db@latest
  Why you should do it regularly: https://github.com/browserslist/update-db#readme
Browserslist: caniuse-lite is outdated. Please run:
  npx update-browserslist-db@latest
  Why you should do it regularly: https://github.com/browserslist/update-db#readme
Failed to compile.

Unexpected end of JSON input


error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

If reporting this issue please do so at (not Homebrew/brew or Homebrew/homebrew-core):
  https://github.com/grafana/homebrew-grafana/issues

Full content of yarn

2024-11-13 15:09:43 +0000

yarn
run
build

yarn run v1.22.22
$ react-scripts build
Creating an optimized production build...
Browserslist: caniuse-lite is outdated. Please run:
npx update-browserslist-db@latest
Why you should do it regularly: https://github.com/browserslist/update-db#readme
Browserslist: caniuse-lite is outdated. Please run:
npx update-browserslist-db@latest
Why you should do it regularly: https://github.com/browserslist/update-db#readme
Failed to compile.

Unexpected end of JSON input

error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

HOMEBREW_VERSION: 4.4.5
ORIGIN: https://github.com/Homebrew/brew
HEAD: 254bf3fe9d8fa2e1b2fb55dbcf535b2d870180c4
Last commit: 2 days ago
Core tap JSON: 13 Nov 15:09 UTC
Core cask tap JSON: 13 Nov 15:09 UTC
HOMEBREW_PREFIX: /opt/homebrew
HOMEBREW_CASK_OPTS: []
HOMEBREW_MAKE_JOBS: 12
HOMEBREW_NO_BOOTSNAP: set
Homebrew Ruby: 3.3.6 => /opt/homebrew/Library/Homebrew/vendor/portable-ruby/3.3.6/bin/ruby
CPU: dodeca-core 64-bit arm_lobos
Clang: 16.0.0 build 1600
Git: 2.39.5 => /Library/Developer/CommandLineTools/usr/bin/git
Curl: 8.7.1 => /usr/bin/curl
macOS: 15.0.1-arm64
CLT: 16.0.0.0.1.1724870825
Xcode: N/A
Rosetta 2: false

HOMEBREW_CC: clang
HOMEBREW_CXX: clang++
MAKEFLAGS: -j12
CMAKE_PREFIX_PATH: /opt/homebrew/opt/[email protected]:/opt/homebrew
CMAKE_INCLUDE_PATH: /Library/Developer/CommandLineTools/SDKs/MacOSX15.sdk/System/Library/Frameworks/OpenGL.framework/Versions/Current/Headers
CMAKE_LIBRARY_PATH: /Library/Developer/CommandLineTools/SDKs/MacOSX15.sdk/System/Library/Frameworks/OpenGL.framework/Versions/Current/Libraries
PKG_CONFIG_LIBDIR: /usr/lib/pkgconfig:/opt/homebrew/Library/Homebrew/os/mac/pkgconfig/15
HOMEBREW_MAKE_JOBS: 12
HOMEBREW_GIT: git
HOMEBREW_SDKROOT: /Library/Developer/CommandLineTools/SDKs/MacOSX15.sdk
ACLOCAL_PATH: /opt/homebrew/share/aclocal
PATH: /opt/homebrew/Library/Homebrew/shims/mac/super:/opt/homebrew/opt/[email protected]/bin:/opt/homebrew/opt/node/bin:/opt/homebrew/opt/yarn/bin:/usr/bin:/bin:/usr/sbin:/sbin

[thampiotr]

Hey! did it work when you retried or does the issue persist?

[kerak19]

I wasn't able to fix that yet. I've tried removing the cask and installing again. ATM I've downloaded the release and ran the binary

[PeterBowater]

Same issues here, MacOS 15.0.1, 2019 Intel.

[thampiotr]

Investigated this a bit and found that it's something unrelated to our recent release of v1.5.0 - it seems to be broken even on v1.0.0 - likely the node / yarn / react build is not reproducible and fails with some dependency:

$ git checkout tags/v1.0.0
Note: switching to 'tags/v1.0.0'.
...
$ git log | head
commit 1eef9b3ae92cb806181dc6ad39a660864f778764
Author: Robert Fratto <[email protected]>
Date:   Fri Apr 5 15:48:59 2024 -0400

    ci: fix windows image tags (#137)

    Aligns tags with Linux.
...
$ cd internal/web/ui/
$ yarn run build
yarn run v1.22.22
$ react-scripts build
Creating an optimized production build...
Failed to compile.

Unexpected end of JSON input


error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

The react project failing to build is here: https://github.com/grafana/alloy/tree/main/internal/web/ui

[thampiotr]

I've managed to get to this stacktrace with the debugger, but I wasn't able to figure out what JSON is failing to parse.

SyntaxError: Unexpected end of JSON input
    at JSON.parse (<anonymous>)
    at ConcatenationScope.matchModuleReference (/Users/thampiotr/workspace/alloy/internal/web/ui/node_modules/webpack/lib/ConcatenationScope.js:148:13)
    at ConcatenatedModule.codeGeneration (/Users/thampiotr/workspace/alloy/internal/web/ui/node_modules/webpack/lib/optimize/ConcatenatedModule.js:1202:41)
    at /Users/thampiotr/workspace/alloy/internal/web/ui/node_modules/webpack/lib/Compilation.js:3332:22
    at /Users/thampiotr/workspace/alloy/internal/web/ui/node_modules/webpack/lib/Cache.js:85:6
    at /Users/thampiotr/workspace/alloy/internal/web/ui/node_modules/webpack/lib/Cache.js:39:11
    at /Users/thampiotr/workspace/alloy/internal/web/ui/node_modules/webpack/lib/cache/IdleFileCachePlugin.js:77:9
    at /Users/thampiotr/workspace/alloy/internal/web/ui/node_modules/webpack/lib/Cache.js:88:6
    at eval (eval at create (/Users/thampiotr/workspace/alloy/internal/web/ui/node_modules/tapable/lib/HookCodeFactory.js:33:10), <anonymous>:30:1)
    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)

If anyone has any further ideas, that would be great help.

yarn cache clean; rm -rf ./node_modules/; yarn install; yarn run build didn't help either

Interestingly, this is reported to build fine on Windows.

[thampiotr]

This could be related to nodejs/node#55826
Reportedly, on node 20 it works, on node 23 it fails.

[thampiotr]

We have merged a PR with a fix to pin to previous Node version. Can you test?

[kerak19]

Confirmed it works now 🎉 Thanks