ログイン済みユーザーのエラーとGitのハング

何も変更していないのに、私のDiscourseフォーラム https://lilypond.community が、ログインCookieを伴うリクエストに対して突然エラーページを返すようになりました:

Oops

このディスカッションフォーラムを支えるソフトウェアが予期しない問題に遭遇しました。ご不便をおかけして申し訳ありません。

エラーに関する詳細情報がログに記録され、自動通知が生成されました。確認いたします。

さらなる対応は不要です。ただし、エラー状態が続く場合は、エラーの再現手順を含む追加の詳細を、サイトのフィードバックカテゴリにトピックとして投稿することで提供できます。

ログインしていない場合、サイトは正常に動作しているようです。

./launcher enter app の後で /shared/log/rails/production.log を確認したところ、このようなエラーが含まれています:

Pitchfork worker is about to timeout, dumping backtrace for main thread
/var/www/discourse/lib/git_utils.rb:33:in 'Kernel#`'
/var/www/discourse/lib/git_utils.rb:33:in 'GitUtils.try_git'
/var/www/discourse/lib/git_utils.rb:21:in 'GitUtils.has_commit?'
/var/www/discourse/lib/discourse_updates.rb:167:in 'block in DiscourseUpdates.new_features'
/var/www/discourse/lib/discourse_updates.rb:163:in 'Array#select!'
/var/www/discourse/lib/discourse_updates.rb:163:in 'DiscourseUpdates.new_features'
/var/www/discourse/lib/discourse_updates.rb:269:in 'DiscourseUpdates.latest_new_feature_created_at'
/var/www/discourse/lib/discourse_updates.rb:254:in 'DiscourseUpdates.has_unseen_features?'
/var/www/discourse/app/serializers/current_user_serializer.rb:193:in 'CurrentUserSerializer#has_unseen_features'
(eval at /var/www/discourse/vendor/bundle/ruby/3.4.0/gems/active_model_serializers-0.8.4/lib/active_model/serializer.rb:467):80:in 'CurrentUserSerializer#_fast_attributes'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/active_model_serializers-0.8.4/lib/active_model/serializer.rb:456:in 'ActiveModel::Serializer#attributes'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/active_model_serializers-0.8.4/lib/active_model/serializer.rb:480:in 'ActiveModel::Serializer#_serializable_hash'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/active_model_serializers-0.8.4/lib/active_model/serializer.rb:359:in 'ActiveModel::Serializer#serializable_hash'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/active_model_serializers-0.8.4/lib/active_model/serializer.rb:347:in 'ActiveModel::Serializer#as_json'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activesupport-8.0.5/lib/active_support/json/encoding.rb:41:in 'Oj::Rails::Encoder#encode'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activesupport-8.0.5/lib/active_support/json/encoding.rb:41:in 'ActiveSupport::JSON.encode'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activesupport-8.0.5/lib/active_support/core_ext/object/json.rb:42:in 'ActiveSupport::ToJsonWithActiveSupportEncoder#to_json'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/active_model_serializers-0.8.4/lib/active_model/serializer.rb:331:in 'ActiveModel::Serializer#to_json'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/multi_json-1.20.1/lib/multi_json/adapters/oj.rb:67:in 'Oj.dump'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/multi_json-1.20.1/lib/multi_json/adapters/oj.rb:67:in 'MultiJson::Adapters::Oj#dump'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/multi_json-1.20.1/lib/multi_json/adapter.rb:92:in 'MultiJson::Adapter.dump'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/multi_json-1.20.1/lib/multi_json.rb:214:in 'MultiJson.dump'
/var/www/discourse/lib/application_layout_preloader.rb:76:in 'ApplicationLayoutPreloader#preload_current_user_data'
/var/www/discourse/lib/application_layout_preloader.rb:32:in 'ApplicationLayoutPreloader#preloaded_data'
/var/www/discourse/app/helpers/application_helper.rb:1001:in 'ApplicationHelper#preloaded_json'
/var/www/discourse/app/views/layouts/application.html.erb:101:in '_app_views_layouts_application_html_erb___243682310287886530_152408'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionview-8.0.5/lib/action_view/base.rb:278:in 'Kernel#public_send'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionview-8.0.5/lib/action_view/base.rb:278:in 'ActionView::Base#_run'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionview-8.0.5/lib/action_view/template.rb:284:in 'block in ActionView::Template#render'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activesupport-8.0.5/lib/active_support/notifications.rb:212:in 'ActiveSupport::Notifications.instrument'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionview-8.0.5/lib/action_view/template.rb:589:in 'ActionView::Template#instrument_render_template'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionview-8.0.5/lib/action_view/template.rb:272:in 'ActionView::Template#render'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/rack-mini-profiler-4.0.1/lib/mini_profiler/profiling_methods.rb:116:in 'block in ActionView::Template#profile_method'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionview-8.0.5/lib/action_view/renderer/template_renderer.rb:77:in 'block in ActionView::TemplateRenderer#render_with_layout'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activesupport-8.0.5/lib/active_support/notifications.rb:210:in 'block in ActiveSupport::Notifications.instrument'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activesupport-8.0.5/lib/active_support/notifications/instrumenter.rb:58:in 'ActiveSupport::Notifications::Instrumenter#instrument'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activesupport-8.0.5/lib/active_support/notifications.rb:210:in 'ActiveSupport::Notifications.instrument'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionview-8.0.5/lib/action_view/renderer/template_renderer.rb:75:in 'ActionView::TemplateRenderer#render_with_layout'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionview-8.0.5/lib/action_view/renderer/template_renderer.rb:59:in 'ActionView::TemplateRenderer#render_template'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionview-8.0.5/lib/action_view/renderer/template_renderer.rb:11:in 'ActionView::TemplateRenderer#render'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionview-8.0.5/lib/action_view/renderer/renderer.rb:58:in 'ActionView::Renderer#render_template_to_object'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionview-8.0.5/lib/action_view/renderer/renderer.rb:31:in 'ActionView::Renderer#render_to_object'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionview-8.0.5/lib/action_view/rendering.rb:136:in 'block in ActionView::Rendering#_render_template'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionview-8.0.5/lib/action_view/base.rb:305:in 'ActionView::Base#in_rendering_context'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionview-8.0.5/lib/action_view/rendering.rb:135:in 'ActionView::Rendering#_render_template'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionpack-8.0.5/lib/action_controller/metal/streaming.rb:179:in 'ActionController::Streaming#_render_template'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionview-8.0.5/lib/action_view/rendering.rb:122:in 'ActionView::Rendering#render_to_body'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionpack-8.0.5/lib/action_controller/metal/rendering.rb:186:in 'ActionController::Rendering#render_to_body'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionpack-8.0.5/lib/action_controller/metal/renderers.rb:140:in 'ActionController::Renderers#render_to_body'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionpack-8.0.5/lib/abstract_controller/rendering.rb:28:in 'AbstractController::Rendering#render'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionpack-8.0.5/lib/action_controller/metal/rendering.rb:167:in 'ActionController::Rendering#render'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionpack-8.0.5/lib/action_controller/metal/instrumentation.rb:31:in 'block (2 levels) in ActionController::Instrumentation#render'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activesupport-8.0.5/lib/active_support/benchmark.rb:17:in 'ActiveSupport::Benchmark.realtime'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionpack-8.0.5/lib/action_controller/metal/instrumentation.rb:31:in 'block in ActionController::Instrumentation#render'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionpack-8.0.5/lib/action_controller/metal/instrumentation.rb:100:in 'ActionController::Instrumentation#cleanup_view_runtime'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/railties/controller_runtime.rb:46:in 'ActiveRecord::Railties::ControllerRuntime#cleanup_view_runtime'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionpack-8.0.5/lib/action_controller/metal/instrumentation.rb:30:in 'ActionController::Instrumentation#render'
/var/www/discourse/lib/topic_list_responder.rb:16:in 'block (2 levels) in TopicListResponder#respond_with_list'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionpack-8.0.5/lib/action_controller/metal/mime_responds.rb:224:in 'ActionController::MimeResponds#respond_to'
/var/www/discourse/lib/topic_list_responder.rb:7:in 'TopicListResponder#respond_with_list'
/var/www/discourse/app/controllers/list_controller.rb:117:in 'block (2 levels) in <class:ListController>'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionpack-8.0.5/lib/action_controller/metal/basic_implicit_render.rb:8:in 'ActionController::BasicImplicitRender#send_action'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionpack-8.0.5/lib/abstract_controller/base.rb:215:in 'AbstractController::Base#process_action'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionpack-8.0.5/lib/action_controller/metal/rendering.rb:193:in 'ActionController::Rendering#process_action'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionpack-8.0.5/lib/abstract_controller/callbacks.rb:261:in 'block in AbstractController::Callbacks#process_action'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activesupport-8.0.5/lib/active_support/callbacks.rb:120:in 'block in ActiveSupport::Callbacks#run_callbacks'
/var/www/discourse/app/controllers/application_controller.rb:443:in 'block in ApplicationController#with_resolved_locale'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/i18n-1.14.8/lib/i18n.rb:354:in 'I18n::Base#with_locale'
/var/www/discourse/app/controllers/application_controller.rb:443:in 'ApplicationController#with_resolved_locale'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activesupport-8.0.5/lib/active_support/callbacks.rb:129:in 'block in ActiveSupport::Callbacks#run_callbacks'
/var/www/discourse/app/controllers/application_controller.rb:1125:in 'ApplicationController#ensure_dont_cache_page'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activesupport-8.0.5/lib/active_support/callbacks.rb:129:in 'block in ActiveSupport::Callbacks#run_callbacks'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activesupport-8.0.5/lib/active_support/callbacks.rb:140:in 'ActiveSupport::Callbacks#run_callbacks'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionpack-8.0.5/lib/abstract_controller/callbacks.rb:260:in 'AbstractController::Callbacks#process_action'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionpack-8.0.5/lib/action_controller/metal/rescue.rb:27:in 'ActionController::Rescue#process_action'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionpack-8.0.5/lib/action_controller/metal/instrumentation.rb:76:in 'block in ActionController::Instrumentation#process_action'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activesupport-8.0.5/lib/active_support/notifications.rb:210:in 'block in ActiveSupport::Notifications.instrument'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activesupport-8.0.5/lib/active_support/notifications/instrumenter.rb:58:in 'ActiveSupport::Notifications::Instrumenter#instrument'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activesupport-8.0.5/lib/active_support/notifications.rb:210:in 'ActiveSupport::Notifications.instrument'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionpack-8.0.5/lib/action_controller/metal/instrumentation.rb:75:in 'ActionController::Instrumentation#process_action'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionpack-8.0.5/lib/action_controller/metal/params_wrapper.rb:259:in 'ActionController::ParamsWrapper#process_action'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/railties/controller_runtime.rb:39:in 'ActiveRecord::Railties::ControllerRuntime#process_action'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionpack-8.0.5/lib/abstract_controller/base.rb:152:in 'AbstractController::Base#process'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionview-8.0.5/lib/action_view/rendering.rb:40:in 'ActionView::Rendering#process'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/rack-mini-profiler-4.0.1/lib/mini_profiler/profiling_methods.rb:116:in 'block in ActionController::Base#profile_method'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionpack-8.0.5/lib/action_controller/metal.rb:252:in 'ActionController::Metal#dispatch'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionpack-8.0.5/lib/action_controller/metal.rb:335:in 'ActionController::Metal.dispatch'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionpack-8.0.5/lib/action_dispatch/routing/route_set.rb:67:in 'ActionDispatch::Routing::RouteSet::Dispatcher#dispatch'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionpack-8.0.5/lib/action_dispatch/routing/route_set.rb:50:in 'ActionDispatch::Routing::RouteSet::Dispatcher#serve'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionpack-8.0.5/lib/action_dispatch/routing/mapper.rb:32:in 'block in <class:Constraints>'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionpack-8.0.5/lib/action_dispatch/routing/mapper.rb:62:in 'ActionDispatch::Routing::Mapper::Constraints#serve'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionpack-8.0.5/lib/action_dispatch/journey/router.rb:53:in 'block in ActionDispatch::Journey::Router#serve'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionpack-8.0.5/lib/action_dispatch/journey/router.rb:133:in 'block in ActionDispatch::Journey::Router#find_routes'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionpack-8.0.5/lib/action_dispatch/journey/router.rb:126:in 'Array#each'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionpack-8.0.5/lib/action_dispatch/journey/router.rb:126:in 'ActionDispatch::Journey::Router#find_routes'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionpack-8.0.5/lib/action_dispatch/journey/router.rb:34:in 'ActionDispatch::Journey::Router#serve'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionpack-8.0.5/lib/action_dispatch/routing/route_set.rb:908:in 'ActionDispatch::Routing::RouteSet#call'
/var/www/discourse/lib/middleware/omniauth_bypass_middleware.rb:35:in 'Middleware::OmniauthBypassMiddleware#call'
/var/www/discourse/lib/middleware/crawler_hooks.rb:13:in 'Middleware::CrawlerHooks#call'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/rack-2.2.23/lib/rack/tempfile_reaper.rb:15:in 'Rack::TempfileReaper#call'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/rack-2.2.23/lib/rack/conditional_get.rb:27:in 'Rack::ConditionalGet#call'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/rack-2.2.23/lib/rack/head.rb:12:in 'Rack::Head#call'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionpack-8.0.5/lib/action_dispatch/http/permissions_policy.rb:38:in 'ActionDispatch::PermissionsPolicy::Middleware#call'
/var/www/discourse/lib/content_security_policy/middleware.rb:12:in 'ContentSecurityPolicy::Middleware#call'
/var/www/discourse/lib/middleware/anonymous_cache.rb:425:in 'Middleware::AnonymousCache#call'
/var/www/discourse/lib/middleware/csp_script_nonce_injector.rb:13:in 'Middleware::CspScriptNonceInjector#call'
/var/www/discourse/lib/middleware/track_view_session_id_injector.rb:12:in 'Middleware::TrackViewSessionIdInjector#call'
/var/www/discourse/config/initializers/008-rack-cors.rb:14:in 'Discourse::Cors#call'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/rack-2.2.23/lib/rack/session/abstract/id.rb:266:in 'Rack::Session::Abstract::Persisted#context'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/rack-2.2.23/lib/rack/session/abstract/id.rb:260:in 'Rack::Session::Abstract::Persisted#call'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionpack-8.0.5/lib/action_dispatch/middleware/cookies.rb:706:in 'ActionDispatch::Cookies#call'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionpack-8.0.5/lib/action_dispatch/middleware/callbacks.rb:31:in 'block in ActionDispatch::Callbacks#call'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activesupport-8.0.5/lib/active_support/callbacks.rb:100:in 'ActiveSupport::Callbacks#run_callbacks'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionpack-8.0.5/lib/action_dispatch/middleware/callbacks.rb:30:in 'ActionDispatch::Callbacks#call'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionpack-8.0.5/lib/action_dispatch/middleware/debug_exceptions.rb:31:in 'ActionDispatch::DebugExceptions#call'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionpack-8.0.5/lib/action_dispatch/middleware/show_exceptions.rb:32:in 'ActionDispatch::ShowExceptions#call'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/logster-2.21.0/lib/logster/middleware/reporter.rb:40:in 'Logster::Middleware::Reporter#call'
/var/www/discourse/lib/middleware/default_headers.rb:13:in 'Middleware::DefaultHeaders#call'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/railties-8.0.5/lib/rails/rack/logger.rb:41:in 'Rails::Rack::Logger#call_app'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/railties-8.0.5/lib/rails/rack/logger.rb:29:in 'Rails::Rack::Logger#call'
/var/www/discourse/config/initializers/100-quiet_logger.rb:20:in 'DiscourseRackQuietAssetsLogger#call'
/var/www/discourse/config/initializers/100-silence_logger.rb:29:in 'SilenceLogger#call'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionpack-8.0.5/lib/action_dispatch/middleware/request_id.rb:34:in 'ActionDispatch::RequestId#call'
/var/www/discourse/lib/middleware/enforce_hostname.rb:23:in 'Middleware::EnforceHostname#call'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/rack-2.2.23/lib/rack/method_override.rb:24:in 'Rack::MethodOverride#call'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionpack-8.0.5/lib/action_dispatch/middleware/executor.rb:16:in 'ActionDispatch::Executor#call'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/rack-2.2.23/lib/rack/sendfile.rb:127:in 'Rack::Sendfile#call'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/rack-mini-profiler-4.0.1/lib/mini_profiler.rb:334:in 'Rack::MiniProfiler#call'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/message_bus-4.5.2/lib/message_bus/rack/middleware.rb:60:in 'MessageBus::Rack::Middleware#call'
/var/www/discourse/lib/middleware/request_tracker.rb:380:in 'Middleware::RequestTracker#call'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/actionpack-8.0.5/lib/action_dispatch/middleware/remote_ip.rb:96:in 'ActionDispatch::RemoteIp#call'
/var/www/discourse/lib/middleware/overload_protections.rb:18:in 'Middleware::OverloadProtections#call'
/var/www/discourse/lib/middleware/processing_request.rb:14:in 'Middleware::ProcessingRequest#call'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/railties-8.0.5/lib/rails/engine.rb:535:in 'Rails::Engine#call'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/railties-8.0.5/lib/rails/railtie.rb:226:in 'Kernel#public_send'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/railties-8.0.5/lib/rails/railtie.rb:226:in 'Rails::Railtie.method_missing'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/rack-2.2.23/lib/rack/urlmap.rb:74:in 'block in Rack::URLMap#call'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/rack-2.2.23/lib/rack/urlmap.rb:58:in 'Array#each'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/rack-2.2.23/lib/rack/urlmap.rb:58:in 'Rack::URLMap#call'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/rack-2.2.23/lib/rack/tempfile_reaper.rb:15:in 'Rack::TempfileReaper#call'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/pitchfork-0.18.2/lib/pitchfork/chunked.rb:105:in 'Pitchfork::Chunked#call'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/rack-2.2.23/lib/rack/content_length.rb:17:in 'Rack::ContentLength#call'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/pitchfork-0.18.2/lib/pitchfork/http_server.rb:868:in 'Pitchfork::HttpServer#process_client'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/pitchfork-0.18.2/lib/pitchfork/http_server.rb:1017:in 'Pitchfork::HttpServer#worker_loop'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/pitchfork-0.18.2/lib/pitchfork/http_server.rb:616:in 'block in Pitchfork::HttpServer#spawn_worker'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/pitchfork-0.18.2/lib/pitchfork/http_server.rb:1222:in 'block in Pitchfork::HttpServer#fork_sibling'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/pitchfork-0.18.2/lib/pitchfork.rb:170:in 'block in Pitchfork.clean_fork'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/pitchfork-0.18.2/lib/pitchfork.rb:168:in 'Kernel#catch'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/pitchfork-0.18.2/lib/pitchfork.rb:168:in 'Pitchfork.clean_fork'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/pitchfork-0.18.2/lib/pitchfork/http_server.rb:690:in 'Pitchfork::HttpServer#spawn_initial_mold'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/pitchfork-0.18.2/lib/pitchfork/http_server.rb:176:in 'Pitchfork::HttpServer#start'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/pitchfork-0.18.2/exe/pitchfork:110:in '<top (required)>'
/var/www/discourse/vendor/bundle/ruby/3.4.0/bin/pitchfork:25:in 'Kernel#load'
/var/www/discourse/vendor/bundle/ruby/3.4.0/bin/pitchfork:25:in '<main>'

  Rendered layout layouts/application.html.erb (Duration: 29736.7ms | GC: 60.9ms)
Completed 500 Internal Server Error in 29972ms (ActiveRecord: 0.0ms (0 queries, 0 cached) | GC: 98.5ms)

また、top -c では git merge-base プロセスがCPU 100%を消費し、大量のRAMを使用していることが時々確認されます。

何が起きている可能性がありますか?

これと同じエラーです:

あ、実際には権限のないユーザーアカウントでログインすると動作するのですが、管理者アカウントでは動きません。ということは、これらのGit操作でハングアップしているのは、管理者インターフェースのアップグレード部分でしょうか?

こちらでも確認されています。タイムアウトが発生している間、管理者やモデレーターがブロックされているようです。

プロセスツリー:

1000     2169778  0.0  0.3 497160 13392 ?        Sl   Aug17   0:15          |       \_ pitchfork monitor - 
1000     2169783  0.0  5.4 6554324 212356 ?      Sl   Aug17   4:55          |       |   \_ pitchfork (gen:0) mold - ready
1000     2170466  0.0  2.3 6567316 91468 ?       Sl   Aug17   0:52          |       |   \_ pitchfork (gen:0) service - ready
1000     2170475  1.3  9.9 6958868 386872 ?      SNl  Aug17 310:37          |       |   |   \_ sidekiq 7.3.10 discourse [0 of 5 busy]
1000     2170499  2.6 11.3 6650900 444392 ?      Sl   Aug17 597:55          |       |   \_ pitchfork (gen:0) worker[0] - requests: 1767782, processing: /
1000     3914556  0.0  0.0      0     0 ?        Z    17:20   0:00          |       |   |   \_ [sh] <defunct>
1000     3925648  0.0  0.0      0     0 ?        Z    19:39   0:00          |       |   |   \_ [sh] <defunct>
1000     3925710  0.0  0.0  10552  2312 ?        S    19:40   0:00          |       |   |   \_ sh -c git merge-base --is-ancestor e20c10c056d2ed11533c3428e33e93cb31fa22d8 HEAD 2> /dev/null; echo $?
1000     3925711 92.4 15.1 710404 590864 ?       R    19:40   0:24          |       |   |       \_ git merge-base --is-ancestor e20c10c056d2ed11533c3428e33e93cb31fa22d8 HEAD
1000     2170558  0.1 10.3 6573012 402832 ?      Sl   Aug17  35:21          |       |   \_ pitchfork (gen:0) worker[1] - requests: 75111, processing: /
1000     3925725  0.0  0.0  10552  2316 ?        S    19:40   0:00          |       |   |   \_ sh -c git merge-base --is-ancestor e20c10c056d2ed11533c3428e33e93cb31fa22d8 HEAD 2> /dev/null; echo $?
1000     3925726 90.1 14.4 710404 562628 ?       R    19:40   0:15          |       |   |       \_ git merge-base --is-ancestor e20c10c056d2ed11533c3428e33e93cb31fa22d8 HEAD
1000     2170585  0.0  8.3 6578772 327676 ?      Rl   Aug17  10:28          |       |   \_ pitchfork (gen:0) worker[2] - requests: 8139, processing: /t/two-upcoming-books-about-videogame-history/4406
1000     2170608  0.0  7.8 6589908 305532 ?      Sl   Aug17   8:08          |       |   \_ pitchfork (gen:0) worker[3] - requests: 4055, waiting
1000     3925781  0.0  0.0  15992  2684 ?        S    19:40   0:00          |       \_ sleep 1

おそらく約2時間前に初めて確認されたようです。

つまり、
DiscourseUpdates.has_unseen_features
は、GitHubが正しく動作していることへのリアルタイムな依存関係を導入している機能なのでしょうか? アップグレードを試行していない場合でも?

この機能をオフにしました:

admin->site admin → version checks → チェックボックスをオフにする → 保存

サイト管理
サイトの管理に関連するさまざまな設定を構成します
version_checks
Discourse Hub にバージョン更新の ping を送信し、管理ダッシュボードに新しいバージョンのメッセージを表示します

そもそも、エラーなしで管理インターフェースを開くことができたのはなぜですか?

gitの無意味な処理がタイムアウトするまで、あるいはリクエストがブロックされていないピッチフォークに届くまで、待つ必要がありました。

私のフォーラム/ログ領域には現在、4件の「pitchfork worker timed out」が表示されていますが、このフォーラムは決して忙しいわけではありません。

sshアクセスからrailsを使用することもできると思います。
これは非常に悪い考えかもしれません。自己責任で進めてください。

# docker exec -i app rails runner 'puts SiteSetting.version_checks'
true
# docker exec -i app rails runner 'SiteSetting.set("version_checks", false)'
# docker exec -i app rails runner 'puts SiteSetting.version_checks'
false

GitHubでは、以前の問題が継続しているようです: