# Sidekiq failing to render after rack gem upgrade

**URL:** https://meta.discourse.org/t/sidekiq-failing-to-render-after-rack-gem-upgrade/138429
**Category:** Bug
**Created:** [13 בינואר,‏ 2020,‏ 6:12am UTC](https://meta.discourse.org/t/sidekiq-failing-to-render-after-rack-gem-upgrade/138429 "2020-01-13T06:12:28Z")
**Posts on this page:** 3
**Page:** 1

<div class="post-metadata">

### Author: ![sau226](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/sau226/32/302324_2.png) [@sau226](https://meta.discourse.org/u/sau226)
#### Post date: [13 בינואר,‏ 2020,‏ 6:12am UTC](https://meta.discourse.org/t/sidekiq-failing-to-render-after-rack-gem-upgrade/138429/1 "2020-01-13T06:12:28Z")

</div>

**Description:**  
Sidekiq fails to load on upgrading to commit [9e399b42b96f115a8367c368862d62aeecfac680](https://github.com/discourse/discourse/commits/9e399b42b96f115a8367c368862d62aeecfac680) of Discourse. This is running on a 2 container setup (web and DB, from ./discourse-setup 2container).

**Buggy behavior:**  
When you go to \<your-discourse-domain-name.tld\>/sidekiq, you get the “The software powering this discussion forum encountered an unexpected problem. We apologize for the inconvenience.” error.

Behavior still occurs even after bootstrap, destroy and restart. Both the DB and web containers have been rebuilt but behavior still occurs too.

**Expected behavior:**  
Sidekiq’s dashboard will open.

**Bug self-diagnosis:**  
After visiting \<your-discourse-domain-name.tld\>/logs, I see only 1 error (I cleared all errors, viewed the sidekiq page and then checked). The error backtrace and info are in the relevant hide details boxes below.

> **Info**
>
> NoMethodError (undefined method `transform_keys' for #<ActionDispatch::Request::Session:0x7fb46388f648 not yet loaded>) /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.1.1/lib/rack/session/abstract/id.rb:212:in `stringify\_keys’

> **Backtrace**
>
> ```
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.1.1/lib/rack/session/abstract/id.rb:212:in `stringify_keys'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.1.1/lib/rack/session/abstract/id.rb:148:in `update'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.1.1/lib/rack/session/abstract/id.rb:317:in `prepare_session'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.1.1/lib/rack/session/abstract/id.rb:276:in `context'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.1.1/lib/rack/session/abstract/id.rb:271:in `call'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.1.1/lib/rack/urlmap.rb:77:in `block in call'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.1.1/lib/rack/urlmap.rb:61:in `each'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.1.1/lib/rack/urlmap.rb:61:in `call'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.1.1/lib/rack/builder.rb:176:in `call'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/sidekiq-6.0.4/lib/sidekiq/web.rb:104:in `call'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/sidekiq-6.0.4/lib/sidekiq/web.rb:109:in `call'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.1/lib/action_dispatch/routing/mapper.rb:19:in `block in <class:Constraints>'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.1/lib/action_dispatch/routing/mapper.rb:48:in `serve'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.1/lib/action_dispatch/journey/router.rb:49:in `block in serve'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.1/lib/action_dispatch/journey/router.rb:32:in `each'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.1/lib/action_dispatch/journey/router.rb:32:in `serve'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.1/lib/action_dispatch/routing/route_set.rb:837:in `call'
> /var/www/discourse/lib/middleware/omniauth_bypass_middleware.rb:68:in `call'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.1.1/lib/rack/tempfile_reaper.rb:17:in `call'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.1.1/lib/rack/conditional_get.rb:27:in `call'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.1.1/lib/rack/head.rb:14:in `call'
> /var/www/discourse/lib/content_security_policy/middleware.rb:12:in `call'
> /var/www/discourse/lib/middleware/anonymous_cache.rb:318:in `call'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.1.1/lib/rack/session/abstract/id.rb:277:in `context'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.1.1/lib/rack/session/abstract/id.rb:271:in `call'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.1/lib/action_dispatch/middleware/cookies.rb:648:in `call'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.1/lib/action_dispatch/middleware/callbacks.rb:27:in `block in call'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activesupport-6.0.1/lib/active_support/callbacks.rb:101:in `run_callbacks'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.1/lib/action_dispatch/middleware/callbacks.rb:26:in `call'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.1/lib/action_dispatch/middleware/actionable_exceptions.rb:17:in `call'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.1/lib/action_dispatch/middleware/debug_exceptions.rb:32:in `call'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.1/lib/action_dispatch/middleware/show_exceptions.rb:33:in `call'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/logster-2.5.1/lib/logster/middleware/reporter.rb:43:in `call'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/railties-6.0.1/lib/rails/rack/logger.rb:38:in `call_app'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/railties-6.0.1/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-6.0.1/lib/action_dispatch/middleware/remote_ip.rb:81:in `call'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.1/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-2.1.1/lib/rack/method_override.rb:24:in `call'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.1/lib/action_dispatch/middleware/executor.rb:14:in `call'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.1.1/lib/rack/sendfile.rb:113:in `call'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.1/lib/action_dispatch/middleware/host_authorization.rb:77:in `call'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-mini-profiler-1.1.4/lib/mini_profiler/profiler.rb:184:in `call'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/message_bus-2.2.3/lib/message_bus/rack/middleware.rb:57:in `call'
> /var/www/discourse/lib/middleware/request_tracker.rb:181:in `call'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/railties-6.0.1/lib/rails/engine.rb:526:in `call'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/railties-6.0.1/lib/rails/railtie.rb:190:in `public_send'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/railties-6.0.1/lib/rails/railtie.rb:190:in `method_missing'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.1.1/lib/rack/urlmap.rb:77:in `block in call'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.1.1/lib/rack/urlmap.rb:61:in `each'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.1.1/lib/rack/urlmap.rb:61:in `call'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/unicorn-5.5.2/lib/unicorn/http_server.rb:605:in `process_client'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/unicorn-5.5.2/lib/unicorn/http_server.rb:700:in `worker_loop'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/unicorn-5.5.2/lib/unicorn/http_server.rb:548:in `spawn_missing_workers'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/unicorn-5.5.2/lib/unicorn/http_server.rb:144:in `start'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/unicorn-5.5.2/bin/unicorn:128:in `<top (required)>'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/bin/unicorn:23:in `load'
> /var/www/discourse/vendor/bundle/ruby/2.6.0/bin/unicorn:23:in `<main>'
> 
> ```

I have a feeling this was caused by the below PR upgrading the Rack gem based off my interpretation of the backtrace  
[https://github.com/discourse/discourse/pull/8702](https://github.com/discourse/discourse/pull/8702)

---

<div class="post-metadata">

### Author: ![sam](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/sam/32/102149_2.png) [@sam](https://meta.discourse.org/u/sam)
#### Post date: [13 בינואר,‏ 2020,‏ 7:08am UTC](https://meta.discourse.org/t/sidekiq-failing-to-render-after-rack-gem-upgrade/138429/3 "2020-01-13T07:08:59Z")

</div>

This is fixed per:

[https://github.com/discourse/discourse/commit/eb105ba79d61604555b310ab553277df1848a78f](https://github.com/discourse/discourse/commit/eb105ba79d61604555b310ab553277df1848a78f)

We are tracking a separate TODO to upgrade Rack.

---

<div class="post-metadata">

### Author: ![sam](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/sam/32/102149_2.png) [@sam](https://meta.discourse.org/u/sam)
#### Post date: [13 בינואר,‏ 2020,‏ 7:09am UTC](https://meta.discourse.org/t/sidekiq-failing-to-render-after-rack-gem-upgrade/138429/4 "2020-01-13T07:09:03Z")

</div>