# The software powering this discussion forum encountered an unexpected problem
**URL:** https://meta.discourse.org/t/the-software-powering-this-discussion-forum-encountered-an-unexpected-problem/112126
**Category:** Support
**Created:** [3월 20, 2019, 6:51오전 UTC](https://meta.discourse.org/t/the-software-powering-this-discussion-forum-encountered-an-unexpected-problem/112126 "2019-03-20T06:51:07Z")
**Posts on this page:** 10
**Page:** 1
### Author:  [@SDKAAA](https://meta.discourse.org/u/SDKAAA)
#### Post date: [3월 20, 2019, 6:51오전 UTC](https://meta.discourse.org/t/the-software-powering-this-discussion-forum-encountered-an-unexpected-problem/112126/1 "2019-03-20T06:51:07Z")
We are facing this problem on our discourse instance:
> # Oops
>
> The software powering this discussion forum encountered an unexpected problem. We apologize for the inconvenience.
>
> Detailed information about the error was logged, and an automatic notification generated. We’ll take a look at it.
>
> No further action is necessary. However, if the error condition persists, you can provide additional detail, including steps to reproduce the error, by posting a discussion topic in the site’s feedback category.
Anyone else facing it? and how to solve it?
---
### Author:  [@sau226](https://meta.discourse.org/u/sau226)
#### Post date: [3월 20, 2019, 8:14오전 UTC](https://meta.discourse.org/t/the-software-powering-this-discussion-forum-encountered-an-unexpected-problem/112126/2 "2019-03-20T08:14:38Z")
Examine the error log by running the below commands (on your server as root)
`cd /var/discourse`
`tail shared/standalone/log/rails/production.log`.
Do whatever you think happened to cause the error. If that message shows up again go and paste the full error message from that log file (remove sensitive stuff like passwords and cookies).
---
### Author:  [@merefield](https://meta.discourse.org/u/merefield)
#### Post date: [3월 20, 2019, 8:18오전 UTC](https://meta.discourse.org/t/the-software-powering-this-discussion-forum-encountered-an-unexpected-problem/112126/3 "2019-03-20T08:18:56Z")
You can just go to `/logs` in the URL btw (a bit quicker than logging in via terminal, but you’ll soon need to do that!)
Do you see this error?:
`StandardError (Attempting to access a non preloaded custom field, this is disallowed to prevent N+1 queries.) /var/www/discourse/app/models/concerns/has_custom_fields.rb:158:in []`
This has been happening to a lot of sites recently due to a core change which is causing several plugins to break the build. Many plugins have been updated to fix this including [Topic List Previews](https://meta.discourse.org/t/topic-list-previews/101646/326), [Events Plugin, Discourse-Solved](https://meta.discourse.org/t/events-plugin-calendar/69776/426) and [Custom Layouts plugins.](https://meta.discourse.org/t/custom-layouts-plugin/55208/224)
First I would perform a complete rebuild to pick up all the updates, then if that doesn’t resolve it I would remove all plugins that don’t have explicit fixes for this and rebuild.
---
### Author:  [@SDKAAA](https://meta.discourse.org/u/SDKAAA)
#### Post date: [3월 20, 2019, 9:34오전 UTC](https://meta.discourse.org/t/the-software-powering-this-discussion-forum-encountered-an-unexpected-problem/112126/4 "2019-03-20T09:34:05Z")
indeed @merefield that’s what is happening! i will do a complete rebuild and get back in here.
---
### Author:  [@SDKAAA](https://meta.discourse.org/u/SDKAAA)
#### Post date: [3월 20, 2019, 9:59오전 UTC](https://meta.discourse.org/t/the-software-powering-this-discussion-forum-encountered-an-unexpected-problem/112126/5 "2019-03-20T09:59:00Z")
Indeed it seems there is also a problem in the discourse-locations plugin?
_Info:_
> JSON::ParserError (765: unexpected token at ‘’)
> /usr/local/lib/ruby/2.5.0/json/common.rb:156:in `parse’
_Backtrace_
```plaintext
/usr/local/lib/ruby/2.5.0/json/common.rb:156:in `parse'
/usr/local/lib/ruby/2.5.0/json/common.rb:156:in `parse'
/var/www/discourse/plugins/discourse-locations/plugin.rb:40:in `block (2 levels) in activate!'
/var/www/discourse/lib/plugin/instance.rb:176:in `block (2 levels) in add_to_class'
/var/www/discourse/plugins/discourse-locations/plugin.rb:69:in `block (2 levels) in activate!'
(eval):40:in `_fast_attributes'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/active_model_serializers-0.8.4/lib/active_model/serializer.rb:456:in `attributes'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/active_model_serializers-0.8.4/lib/active_model/serializer.rb:480:in `_serializable_hash'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/active_model_serializers-0.8.4/lib/active_model/serializer.rb:359:in `serializable_hash'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/active_model_serializers-0.8.4/lib/active_model/serializer/associations.rb:124:in `block in serialize'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/active_model_serializers-0.8.4/lib/active_model/serializer/associations.rb:123:in `map'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/active_model_serializers-0.8.4/lib/active_model/serializer/associations.rb:123:in `serialize'
/var/www/discourse/lib/freedom_patches/ams_include_without_root.rb:55:in `include!'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/active_model_serializers-0.8.4/lib/active_model/serializer.rb:368:in `block in include_associations!'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/active_model_serializers-0.8.4/lib/active_model/serializer.rb:367:in `each_key'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/active_model_serializers-0.8.4/lib/active_model/serializer.rb:367:in `include_associations!'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/active_model_serializers-0.8.4/lib/active_model/serializer.rb:362:in `serializable_hash'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/active_model_serializers-0.8.4/lib/active_model/serializer.rb:347:in `as_json'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2.1/lib/active_support/json/encoding.rb:35:in `encode'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2.1/lib/active_support/json/encoding.rb:22:in `encode'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2.1/lib/active_support/core_ext/object/json.rb:41:in `to_json'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/active_model_serializers-0.8.4/lib/active_model/serializer.rb:331:in `to_json'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/multi_json-1.13.1/lib/multi_json/adapters/oj.rb:40:in `dump'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/multi_json-1.13.1/lib/multi_json/adapters/oj.rb:40:in `dump'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/multi_json-1.13.1/lib/multi_json/adapter.rb:25:in `dump'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/multi_json-1.13.1/lib/multi_json.rb:139:in `dump'
/var/www/discourse/app/models/site.rb:123:in `json_for'
/var/www/discourse/app/controllers/application_controller.rb:530:in `preload_anonymous_data'
/var/www/discourse/app/controllers/application_controller.rb:350:in `preload_json'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2.1/lib/active_support/callbacks.rb:426:in `block in make_lambda'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2.1/lib/active_support/callbacks.rb:198:in `block (2 levels) in halting'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/actionpack-5.2.2.1/lib/abstract_controller/callbacks.rb:34:in `block (2 levels) in '
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2.1/lib/active_support/callbacks.rb:199:in `block in halting'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2.1/lib/active_support/callbacks.rb:513:in `block in invoke_before'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2.1/lib/active_support/callbacks.rb:513:in `each'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2.1/lib/active_support/callbacks.rb:513:in `invoke_before'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2.1/lib/active_support/callbacks.rb:131:in `run_callbacks'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/actionpack-5.2.2.1/lib/abstract_controller/callbacks.rb:41:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/actionpack-5.2.2.1/lib/action_controller/metal/rescue.rb:22:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/actionpack-5.2.2.1/lib/action_controller/metal/instrumentation.rb:34:in `block in process_action'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2.1/lib/active_support/notifications.rb:168:in `block in instrument'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2.1/lib/active_support/notifications/instrumenter.rb:23:in `instrument'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2.1/lib/active_support/notifications.rb:168:in `instrument'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/actionpack-5.2.2.1/lib/action_controller/metal/instrumentation.rb:32:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/actionpack-5.2.2.1/lib/action_controller/metal/params_wrapper.rb:256:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.2.1/lib/active_record/railties/controller_runtime.rb:24:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/actionpack-5.2.2.1/lib/abstract_controller/base.rb:134:in `process'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/actionview-5.2.2.1/lib/action_view/rendering.rb:32:in `process'
/var/www/discourse/vendor/bundle/ruby/2.5.0/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/2.5.0/gems/actionpack-5.2.2.1/lib/action_controller/metal.rb:191:in `dispatch'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/actionpack-5.2.2.1/lib/action_controller/metal.rb:252:in `dispatch'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/actionpack-5.2.2.1/lib/action_dispatch/routing/route_set.rb:52:in `dispatch'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/actionpack-5.2.2.1/lib/action_dispatch/routing/route_set.rb:34:in `serve'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/actionpack-5.2.2.1/lib/action_dispatch/routing/mapper.rb:18:in `block in '
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/actionpack-5.2.2.1/lib/action_dispatch/routing/mapper.rb:48:in `serve'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/actionpack-5.2.2.1/lib/action_dispatch/journey/router.rb:52:in `block in serve'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/actionpack-5.2.2.1/lib/action_dispatch/journey/router.rb:35:in `each'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/actionpack-5.2.2.1/lib/action_dispatch/journey/router.rb:35:in `serve'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/actionpack-5.2.2.1/lib/action_dispatch/routing/route_set.rb:840:in `call'
/var/www/discourse/vendor/bundle/ruby/2.5.0/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/2.5.0/gems/rack-2.0.6/lib/rack/tempfile_reaper.rb:15:in `call'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/rack-2.0.6/lib/rack/conditional_get.rb:25:in `call'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/rack-2.0.6/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:216:in `call'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/rack-2.0.6/lib/rack/session/abstract/id.rb:232:in `context'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/rack-2.0.6/lib/rack/session/abstract/id.rb:226:in `call'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/actionpack-5.2.2.1/lib/action_dispatch/middleware/cookies.rb:670:in `call'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/actionpack-5.2.2.1/lib/action_dispatch/middleware/callbacks.rb:28:in `block in call'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2.1/lib/active_support/callbacks.rb:98:in `run_callbacks'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/actionpack-5.2.2.1/lib/action_dispatch/middleware/callbacks.rb:26:in `call'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/actionpack-5.2.2.1/lib/action_dispatch/middleware/debug_exceptions.rb:61:in `call'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/actionpack-5.2.2.1/lib/action_dispatch/middleware/show_exceptions.rb:33:in `call'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/logster-2.1.2/lib/logster/middleware/reporter.rb:30:in `call'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/railties-5.2.2.1/lib/rails/rack/logger.rb:38:in `call_app'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/railties-5.2.2.1/lib/rails/rack/logger.rb:28:in `call'
/var/www/discourse/config/initializers/100-quiet_logger.rb:16:in `call'
/var/www/discourse/config/initializers/100-silence_logger.rb:29:in `call'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/actionpack-5.2.2.1/lib/action_dispatch/middleware/remote_ip.rb:81:in `call'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/actionpack-5.2.2.1/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/2.5.0/gems/rack-2.0.6/lib/rack/method_override.rb:22:in `call'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/actionpack-5.2.2.1/lib/action_dispatch/middleware/executor.rb:14:in `call'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/rack-2.0.6/lib/rack/sendfile.rb:111:in `call'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/rack-mini-profiler-1.0.2/lib/mini_profiler/profiler.rb:171:in `call'
/var/www/discourse/vendor/bundle/ruby/2.5.0/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/2.5.0/gems/railties-5.2.2.1/lib/rails/engine.rb:524:in `call'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/railties-5.2.2.1/lib/rails/railtie.rb:190:in `public_send'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/railties-5.2.2.1/lib/rails/railtie.rb:190:in `method_missing'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/rack-2.0.6/lib/rack/urlmap.rb:68:in `block in call'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/rack-2.0.6/lib/rack/urlmap.rb:53:in `each'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/rack-2.0.6/lib/rack/urlmap.rb:53:in `call'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/unicorn-5.4.1/lib/unicorn/http_server.rb:606:in `process_client'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/unicorn-5.4.1/lib/unicorn/http_server.rb:701:in `worker_loop'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/unicorn-5.4.1/lib/unicorn/http_server.rb:549:in `spawn_missing_workers'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/unicorn-5.4.1/lib/unicorn/http_server.rb:142:in `start'
/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/unicorn-5.4.1/bin/unicorn:126:in `'
/var/www/discourse/vendor/bundle/ruby/2.5.0/bin/unicorn:23:in `load'
/var/www/discourse/vendor/bundle/ruby/2.5.0/bin/unicorn:23:in `'
```
---
### Author:  [@merefield](https://meta.discourse.org/u/merefield)
#### Post date: [3월 20, 2019, 10:01오전 UTC](https://meta.discourse.org/t/the-software-powering-this-discussion-forum-encountered-an-unexpected-problem/112126/6 "2019-03-20T10:01:51Z")
So build without it and raise in [the plugin’s Topic](https://meta.discourse.org/t/locations-plugin/69742/376).
---
### Author:  [@SDKAAA](https://meta.discourse.org/u/SDKAAA)
#### Post date: [3월 20, 2019, 10:02오전 UTC](https://meta.discourse.org/t/the-software-powering-this-discussion-forum-encountered-an-unexpected-problem/112126/7 "2019-03-20T10:02:36Z")
building as we speak, thx!
---
### Author:  [@SDKAAA](https://meta.discourse.org/u/SDKAAA)
#### Post date: [3월 20, 2019, 10:14오전 UTC](https://meta.discourse.org/t/the-software-powering-this-discussion-forum-encountered-an-unexpected-problem/112126/8 "2019-03-20T10:14:25Z")
the build without it worked… however i wonder what will happen with the posts that already ahve locations in them 🤨
---
### Author:  [@merefield](https://meta.discourse.org/u/merefield)
#### Post date: [3월 20, 2019, 10:16오전 UTC](https://meta.discourse.org/t/the-software-powering-this-discussion-forum-encountered-an-unexpected-problem/112126/9 "2019-03-20T10:16:04Z")
I’m not qualified to comment wrt to the Locations Plugin, but suspect the data will still be there and return as have noticed that behaviour with many other plugins. Raise with angus.
---
### Author:  [@system](https://meta.discourse.org/u/system)
#### Post date: [4월 19, 2019, 10:16오전 UTC](https://meta.discourse.org/t/the-software-powering-this-discussion-forum-encountered-an-unexpected-problem/112126/10 "2019-04-19T10:16:15Z")
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