Webpacker can't get compiled pack?

Question

Ruby on Rails

ActionController::RoutingError (No route matches [GET] "/packs/js/application-956864 Run

in dev, webpacker compiles js but can't find route, any manipulations with reinstalling webpacker doesn't help.

Started GET "/packs/js/application-9568643e0a49fe31aba3.js" for 127.0.0.1 at 2020-10-30 22:01:14 +0200
   (2.8ms)  SELECT "schema_migrations"."version" FROM "schema_migrations" ORDER BY "schema_migrations"."version" ASC

ActionController::RoutingError (No route matches [GET] "/packs/js/application-9568643e0a49fe31aba3.js"):

actionpack (6.0.3.4) lib/action_dispatch/middleware/debug_exceptions.rb:36:in `call'
web-console (4.0.4) lib/web_console/middleware.rb:132:in `call_app'
web-console (4.0.4) lib/web_console/middleware.rb:28:in `block in call'
web-console (4.0.4) lib/web_console/middleware.rb:17:in `catch'
web-console (4.0.4) lib/web_console/middleware.rb:17:in `call'
actionpack (6.0.3.4) lib/action_dispatch/middleware/show_exceptions.rb:33:in `call'
railties (6.0.3.4) lib/rails/rack/logger.rb:37:in `call_app'
railties (6.0.3.4) lib/rails/rack/logger.rb:26:in `block in call'
activesupport (6.0.3.4) lib/active_support/tagged_logging.rb:80:in `block in tagged'
activesupport (6.0.3.4) lib/active_support/tagged_logging.rb:28:in `tagged'
activesupport (6.0.3.4) lib/active_support/tagged_logging.rb:80:in `tagged'
railties (6.0.3.4) lib/rails/rack/logger.rb:26:in `call'
sprockets-rails (3.2.2) lib/sprockets/rails/quiet_assets.rb:13:in `call'
actionpack (6.0.3.4) lib/action_dispatch/middleware/remote_ip.rb:81:in `call'
actionpack (6.0.3.4) lib/action_dispatch/middleware/request_id.rb:27:in `call'
rack (2.2.3) lib/rack/method_override.rb:24:in `call'
rack (2.2.3) lib/rack/runtime.rb:22:in `call'
activesupport (6.0.3.4) lib/active_support/cache/strategy/local_cache_middleware.rb:29:in `call'
actionpack (6.0.3.4) lib/action_dispatch/middleware/executor.rb:14:in `call'
rack (2.2.3) lib/rack/sendfile.rb:110:in `call'
actionpack (6.0.3.4) lib/action_dispatch/middleware/host_authorization.rb:82:in `call'
webpacker (4.3.0) lib/webpacker/dev_server_proxy.rb:23:in `perform_request'
rack-proxy (0.6.5) lib/rack/proxy.rb:57:in `call'
railties (6.0.3.4) lib/rails/engine.rb:527:in `call'
puma (4.3.6) lib/puma/configuration.rb:228:in `call'
puma (4.3.6) lib/puma/server.rb:713:in `handle_request'
puma (4.3.6) lib/puma/server.rb:472:in `process_client'
puma (4.3.6) lib/puma/server.rb:328:in `block in run'
puma (4.3.6) lib/puma/thread_pool.rb:134:in `block in spawn_thread'

webpacker.yml

# Note: You must restart bin/webpack-dev-server for changes to take effect

default: &default
  source_path: app/javascript
  source_entry_path: packs
  public_root_path: public
  public_output_path: packs
  cache_path: tmp/cache/webpacker
  check_yarn_integrity: false
  webpack_compile_output: true

  # Additional paths webpack should lookup modules
  # ['app/assets', 'engine/foo/app/assets']
  resolved_paths: ['app/assets']

  # Reload manifest.json on all requests so we reload latest compiled packs
  cache_manifest: false

  # Extract and emit a css file
  extract_css: false

  static_assets_extensions:
    - .jpg
    - .jpeg
    - .png
    - .gif
    - .tiff
    - .ico
    - .svg
    - .eot
    - .otf
    - .ttf
    - .woff
    - .woff2

  extensions:
    - .mjs
    - .js
    - .sass
    - .scss
    - .css
    - .module.sass
    - .module.scss
    - .module.css
    - .png
    - .svg
    - .gif
    - .jpeg
    - .jpg

development:
  <<: *default
  compile: true

  # Verifies that correct packages and versions are installed by inspecting package.json, yarn.lock, and node_modules
  check_yarn_integrity: true

  # Reference: https://webpack.js.org/configuration/dev-server/
  dev_server:
    https: false
    host: localhost
    port: 3035
    public: localhost:3035
    hmr: false
    # Inline should be set to true if using HMR
    inline: true
    overlay: true
    compress: true
    disable_host_check: true
    use_local_ip: false
    quiet: false
    pretty: false
    headers:
      'Access-Control-Allow-Origin': '*'
    watch_options:
      ignored: '**/node_modules/**'


test:
  <<: *default
  compile: true

  # Compile test packs to a separate directory
  public_output_path: packs-test

production:
  <<: *default

  # Production depends on precompilation of packs prior to booting for performance.
  compile: false

  # Extract and emit a css file
  extract_css: true

  # Cache manifest.json for performance
  cache_manifest: true

Answer 1

It is possible that the previous asset remained in the browser cache.
I would try clearing the cache and
rails assets:clobber
rails tmp:clear
and then clearing the browser cache.