# Failed upgrade from 3.5.0.beta8-dev to 3.6.0.beta1
**URL:** https://meta.discourse.org/t/failed-upgrade-from-3-5-0-beta8-dev-to-3-6-0-beta1/385381
**Category:** Self-hosting
**Created:** [October 12, 2025, 9:13pm UTC](https://meta.discourse.org/t/failed-upgrade-from-3-5-0-beta8-dev-to-3-6-0-beta1/385381 "2025-10-12T21:13:03Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@xyzzy](https://meta.discourse.org/u/xyzzy)
#### Post date: [October 12, 2025, 9:13pm UTC](https://meta.discourse.org/t/failed-upgrade-from-3-5-0-beta8-dev-to-3-6-0-beta1/385381/1 "2025-10-12T21:13:03Z")
I’m self-hosted and have 3 of the plugins that were recently moved to core.
My upgrade steps:
1. Edited containers/app.yml and removed the lines for the 3 plugins (data-explorer, solved, assign)
2. cd /var/discourse
3. sudo ./launcher rebuild app
The rebuild takes the usual 5 minutes and seems to complete normally.
However, when I attempt to connect to the site, I get no response.
The last few lines in /var/discourse/shared/standalone/log/rails/production.log are:
`Booted Rails 8.0.3 application in production environment`
`Running in ruby 3.3.8 (2025-04-09 revision b200bad6cd) [x86_64-linux]`
`See LICENSE and the LGPL-3.0 for licensing details.`
`Upgrade to Sidekiq Pro for more features and support: ``https://sidekiq.org`
`Sidekiq 7.3.9 connecting to Redis with options {:size=>5, :pool_name=>“default”, :host=>“localhost”, :port=>6379, :db=>1, :url=>nil}`
`Sidekiq 7.3.9 connecting to Redis with options {:size=>10, :pool_name=>“internal”, :host=>“localhost”, :port=>6379, :db=>1, :url=>nil}`
`Sidekiq 7.3.9 connecting to Redis with options {:size=>10, :pool_name=>“internal”, :host=>“localhost”, :port=>6379, :db=>1, :url=>nil}`
`Sidekiq 7.3.9 connecting to Redis with options {:size=>10, :pool_name=>“internal”, :host=>“localhost”, :port=>6379, :db=>1, :url=>nil}`
`Sidekiq 7.3.9 connecting to Redis with options {:size=>10, :pool_name=>“internal”, :host=>“localhost”, :port=>6379, :db=>1, :url=>nil}`
`Sidekiq 7.3.9 connecting to Redis with options {:size=>10, :pool_name=>“internal”, :host=>“localhost”, :port=>6379, :db=>1, :url=>nil}`
The last few lines in /var/discourse/shared/standalone/log/rails/unicorn.stderr.log are:
`/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/message_bus-4.4.1/lib/message_bus/backends/redis.rb:291:in global_subscribe' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/message_bus-4.4.1/lib/message_bus.rb:769:in global_subscribe_thread’`
`/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/message_bus-4.4.1/lib/message_bus.rb:740:in `block in new_subscriber_thread’`
`unknown OID 23281: failed to recognize type of ‘embeddings’. It will be treated as String.`
I also tried rebuilding a 2nd time and its still not working.
Any idea what’s going on?
---
### Author:  [@pfaffman](https://meta.discourse.org/u/pfaffman)
#### Post date: [October 13, 2025, 12:33am UTC](https://meta.discourse.org/t/failed-upgrade-from-3-5-0-beta8-dev-to-3-6-0-beta1/385381/2 "2025-10-13T00:33:27Z")
> [@xyzzy](#):
>
> , I get no response.
So the request times out?
---
### Author:  [@xyzzy](https://meta.discourse.org/u/xyzzy)
#### Post date: [October 13, 2025, 12:48am UTC](https://meta.discourse.org/t/failed-upgrade-from-3-5-0-beta8-dev-to-3-6-0-beta1/385381/3 "2025-10-13T00:48:58Z")
> [@pfaffman](#):
>
> So the request times out?
The server refuses the connection. It seems to take about 2 seconds for the connection to be refused in both browsers I’ve tried. And nothing new shows up in production.log.
---
### Author:  [@xyzzy](https://meta.discourse.org/u/xyzzy)
#### Post date: [October 13, 2025, 8:32pm UTC](https://meta.discourse.org/t/failed-upgrade-from-3-5-0-beta8-dev-to-3-6-0-beta1/385381/4 "2025-10-13T20:32:28Z")
Any ideas what’s going on? Any suggestions for additional debugging steps?
---
### Author:  [@Ed\_S](https://meta.discourse.org/u/Ed_S)
#### Post date: [October 14, 2025, 4:32pm UTC](https://meta.discourse.org/t/failed-upgrade-from-3-5-0-beta8-dev-to-3-6-0-beta1/385381/5 "2025-10-14T16:32:42Z")
I’d look at two things
- is the server process running and listening
- is your browser trying to contact the correct server
Check that your forum URL’s domain name does resolve, from your own PC, to the IP address of your server. Double-check.
Perhaps try, on your server
```plaintext
ping -c1 DOMAINNAME
netstat -l | egrep http
lsof -u root | egrep LISTEN
```
---
### Author:  [@pfaffman](https://meta.discourse.org/u/pfaffman)
#### Post date: [October 14, 2025, 4:46pm UTC](https://meta.discourse.org/t/failed-upgrade-from-3-5-0-beta8-dev-to-3-6-0-beta1/385381/6 "2025-10-14T16:46:42Z")
You can try
```
docker logs app
```
The last person I helped had a bogus value for his letsencrypt email address. It sounds like nginx isn’t starting up for some reason. The most common reason is that the certs are broken.