こんにちは、
現在、Discourse v2.3.2 を使用しており、奇妙な問題に直面しています。フォーラムのドメイン（パスなし）へのリンクを含むトピックや投稿を作成すると、内部サーバーエラーのため保存できません。
例えば、フォーラムの URL が https://www.my-forum.com で、以下のような投稿をするとします：
「私たちの[ホームページ](https://www.my-forum.com) をご覧ください」
その結果は以下のようになります：
リンクを […] [homepage](https://www.my-forum.com/latest) や […] [homepage](https://www.my-forum.com/categories) に変更すると、すべて正常に動作します。
以下はログです：
メッセージ（21 件のコピーが報告されました）
NoMethodError (nil:NilClass で `split' メソッドが定義されていません)
/var/www/discourse/lib/auth/default_current_user_provider.rb:54:in `current_user'
バックトレース
/var/www/discourse/lib/auth/default_current_user_provider.rb:54:in `current_user'
/var/www/discourse/lib/homepage_constraint.rb:12:in `matches?'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_dispatch/routing/mapper.rb:40:in `block in matches?'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_dispatch/routing/mapper.rb:39:in `all?'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_dispatch/routing/mapper.rb:39:in `matches?'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_dispatch/routing/route_set.rb:869:in `block in recognize_path_with_request'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_dispatch/journey/router.rb:75:in `block in recognize'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_dispatch/journey/router.rb:68:in `each'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_dispatch/journey/router.rb:68:in `recognize'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_dispatch/routing/route_set.rb:859:in `recognize_path_with_request'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_dispatch/routing/route_set.rb:855:in `recognize_path'
/var/www/discourse/lib/discourse.rb:299:in `route_for'
/var/www/discourse/app/models/topic_link.rb:182:in `ensure_entry_for'
/var/www/discourse/app/models/topic_link.rb:130:in `block (2 levels) in extract_from'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-5.2.3/lib/active_record/connection_adapters/abstract/database_statements.rb:265:in `transaction'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-5.2.3/lib/active_record/transactions.rb:212:in `transaction'
/var/www/discourse/app/models/topic_link.rb:128:in `block in extract_from'
/var/www/discourse/app/models/topic_link.rb:126:in `each'
/var/www/discourse/app/models/topic_link.rb:126:in `extract_from'
/var/www/discourse/lib/post_creator.rb:559:in `extract_links'
/var/www/discourse/lib/post_creator.rb:177:in `block in create'
/var/www/discourse/lib/post_creator.rb:357:in `block (2 levels) in transaction'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-5.2.3/lib/active_record/connection_adapters/abstract/database_statements.rb:267:in `block in transaction'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-5.2.3/lib/active_record/connection_adapters/abstract/transaction.rb:239:in `block in within_new_transaction'
/usr/local/rvm/rubies/ruby-2.6.3/lib/ruby/2.6.0/monitor.rb:230:in `mon_synchronize'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-5.2.3/lib/active_record/connection_adapters/abstract/transaction.rb:236:in `within_new_transaction'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-5.2.3/lib/active_record/connection_adapters/abstract/database_statements.rb:267:in `transaction'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-5.2.3/lib/active_record/transactions.rb:212:in `transaction'
/var/www/discourse/lib/post_creator.rb:356:in `block in transaction'
/var/www/discourse/lib/distributed_mutex.rb:42:in `synchronize'
/var/www/discourse/lib/distributed_mutex.rb:12:in `synchronize'
/var/www/discourse/lib/post_creator.rb:355:in `transaction'
/var/www/discourse/lib/post_creator.rb:171:in `create'
/var/www/discourse/lib/new_post_manager.rb:248:in `perform_create_post'
/var/www/discourse/lib/new_post_manager.rb:191:in `perform'
/var/www/discourse/app/controllers/posts_controller.rb:188:in `create'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_controller/metal/basic_implicit_render.rb:6:in `send_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/abstract_controller/base.rb:194:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_controller/metal/rendering.rb:30:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/abstract_controller/callbacks.rb:42:in `block in process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activesupport-5.2.3/lib/active_support/callbacks.rb:132:in `run_callbacks'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/abstract_controller/callbacks.rb:41:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_controller/metal/rescue.rb:22:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_controller/metal/instrumentation.rb:34:in `block in process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activesupport-5.2.3/lib/active_support/notifications.rb:168:in `block in instrument'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activesupport-5.2.3/lib/active_support/notifications/instrumenter.rb:23:in `instrument'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activesupport-5.2.3/lib/active_support/notifications.rb:168:in `instrument'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_controller/metal/instrumentation.rb:32:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_controller/metal/params_wrapper.rb:256:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-5.2.3/lib/active_record/railties/controller_runtime.rb:24:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/abstract_controller/base.rb:134:in `process'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionview-5.2.3/lib/action_view/rendering.rb:32:in `process'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-mini-profiler-1.0.2/lib/mini_profiler/profiling_methods.rb:78:in `block in profile_method'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_controller/metal.rb:191:in `dispatch'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_controller/metal.rb:252:in `dispatch'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_dispatch/routing/route_set.rb:52:in `dispatch'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_dispatch/routing/route_set.rb:34:in `serve'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_dispatch/journey/router.rb:52:in `block in serve'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_dispatch/journey/router.rb:35:in `each'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_dispatch/journey/router.rb:35:in `serve'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_dispatch/routing/route_set.rb:840:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-protection-2.0.5/lib/rack/protection/frame_options.rb:31:in `call'
/var/www/discourse/lib/middleware/omniauth_bypass_middleware.rb:32:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.0.7/lib/rack/tempfile_reaper.rb:15:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.0.7/lib/rack/conditional_get.rb:38:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.0.7/lib/rack/head.rb:12:in `call'
/var/www/discourse/lib/content_security_policy/middleware.rb:12:in `call'
/var/www/discourse/lib/middleware/anonymous_cache.rb:220:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.0.7/lib/rack/session/abstract/id.rb:232:in `context'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.0.7/lib/rack/session/abstract/id.rb:226:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_dispatch/middleware/cookies.rb:670:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_dispatch/middleware/callbacks.rb:28:in `block in call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activesupport-5.2.3/lib/active_support/callbacks.rb:98:in `run_callbacks'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_dispatch/middleware/callbacks.rb:26:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_dispatch/middleware/debug_exceptions.rb:61:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_dispatch/middleware/show_exceptions.rb:33:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/logster-2.3.0/lib/logster/middleware/reporter.rb:30:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/railties-5.2.3/lib/rails/rack/logger.rb:38:in `call_app'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/railties-5.2.3/lib/rails/rack/logger.rb:28:in `call'
/var/www/discourse/config/initializers/100-quiet_logger.rb:18:in `call'
/var/www/discourse/config/initializers/100-silence_logger.rb:31:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_dispatch/middleware/remote_ip.rb:81:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_dispatch/middleware/request_id.rb:27:in `call'
/var/www/discourse/lib/middleware/enforce_hostname.rb:17:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.0.7/lib/rack/method_override.rb:22:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_dispatch/middleware/executor.rb:14:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.0.7/lib/rack/sendfile.rb:111:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-mini-profiler-1.0.2/lib/mini_profiler/profiler.rb:171:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/message_bus-2.2.0/lib/message_bus/rack/middleware.rb:57:in `call'
/var/www/discourse/lib/middleware/request_tracker.rb:163:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/railties-5.2.3/lib/rails/engine.rb:524:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/railties-5.2.3/lib/rails/railtie.rb:190:in `public_send'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/railties-5.2.3/lib/rails/railtie.rb:190:in `method_missing'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.0.7/lib/rack/urlmap.rb:68:in `block in call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.0.7/lib/rack/urlmap.rb:53:in `each'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.0.7/lib/rack/urlmap.rb:53:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/puma-3.12.1/lib/puma/configuration.rb:227:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/puma-3.12.1/lib/puma/server.rb:660:in `handle_request'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/puma-3.12.1/lib/puma/server.rb:474:in `process_client'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/puma-3.12.1/lib/puma/server.rb:334:in `block in run'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/puma-3.12.1/lib/puma/thread_pool.rb:135:in `block in spawn_thread'
環境
hostname [d585a64b75c4, 63b1df94653a]
process_id 11230
application_version af192ff9d576abd451b30dc3dcbafa1d2b52a254
HTTP_HOST beta.wer-weiss-was.de
REQUEST_URI /posts
REQUEST_METHOD POST
HTTP_USER_AGENT Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/76.0.3809.100 Safari/537.36
HTTP_ACCEPT application/json, text/javascript, */*; q=0.01
HTTP_REFERER https://beta.wer-weiss-was.de/t/topic-slug/1234567/37
HTTP_X_FORWARDED_FOR 123.123.123.123:12345, 123.123.123.123
HTTP_X_REAL_IP 123.123.123.123
username my-username
params
raw パスなし TLD へのリンクを含むテキスト
unlist_topic false
category 603
topic_id 1234567
is_warning false
whisper false
archetype regular
typing_duration_msecs 77700
composer_open_duration_msecs 15485
featured_link
shared_draft false
reply_to_post_number 39
nested_post true
なぜこのようなことが起こるのか、何かアイデアがあれば幸いです。
よろしくお願いいたします
サシャ・ホフマン