Issue with new update: debugging options

Installation
1

I noticed some issues with the recent update. I just updated from 3.4.0 beta1 to the latest (3.4.0.beta2-dev) and the site seems to work and then after a while (within 2 hours) the site stops responding (I get a host error via cloudflare). I have the old docker still up (split app/db) so pointed the proxy back the old docker container which still works.

I’m trying to figure out how best to debug it. Is there a way to assign a temporary different hostname to the docker to debug the instance separately (without re-writing the database to the new entries)?

1 Like
2

Is there a way to view the logs from the command line?

2 Likes
3

Yup, take a look in /var/discourse/shared/standalone/log/rails

2 Likes
4

There seem to be a lot of Redis errors, though these are current even though I reverted back to the old docker container.

E, [2024-08-29T13:47:47.112726 #74] ERROR -- : /var/www/discourse/lib/discourse_redis.rb:148:in `public_send'
E, [2024-08-29T13:47:47.112738 #74] ERROR -- : /var/www/discourse/lib/discourse_redis.rb:148:in `block (3 levels) in <class:DiscourseRedis>'
E, [2024-08-29T13:47:47.112748 #74] ERROR -- : /var/www/discourse/lib/discourse_redis.rb:29:in `ignore_readonly'
E, [2024-08-29T13:47:47.112768 #74] ERROR -- : /var/www/discourse/lib/discourse_redis.rb:148:in `block (2 levels) in <class:DiscourseRedis>'
E, [2024-08-29T13:47:47.112781 #74] ERROR -- : /var/www/discourse/app/jobs/regular/run_heartbeat.rb:16:in `last_heartbeat'
E, [2024-08-29T13:47:47.112790 #74] ERROR -- : config/unicorn.conf.rb:182:in `check_sidekiq_heartbeat'
E, [2024-08-29T13:47:47.112799 #74] ERROR -- : config/unicorn.conf.rb:269:in `master_sleep'
E, [2024-08-29T13:47:47.112807 #74] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/unicorn-6.1.0/lib/unicorn/http_server.rb:295:in `join'
E, [2024-08-29T13:47:47.112815 #74] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/unicorn-6.1.0/bin/unicorn:128:in `<top (required)>'
E, [2024-08-29T13:47:47.112823 #74] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/bin/unicorn:25:in `load'
E, [2024-08-29T13:47:47.112831 #74] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/bin/unicorn:25:in `<main>'
E, [2024-08-29T13:47:57.124969 #74] ERROR -- : master loop error: Error connecting to Redis on localhost:6379 (Redis::TimeoutError) (Redis::CannotConnectError)
E, [2024-08-29T13:47:57.125051 #74] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/redis-4.8.1/lib/redis/client.rb:398:in `rescue in establish_connection'
E, [2024-08-29T13:47:57.125063 #74] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/redis-4.8.1/lib/redis/client.rb:379:in `establish_connection'
E, [2024-08-29T13:47:57.125072 #74] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/redis-4.8.1/lib/redis/client.rb:115:in `block in connect'
E, [2024-08-29T13:47:57.125080 #74] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/redis-4.8.1/lib/redis/client.rb:344:in `with_reconnect'
E, [2024-08-29T13:47:57.125088 #74] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/redis-4.8.1/lib/redis/client.rb:114:in `connect'
E, [2024-08-29T13:47:57.125109 #74] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/redis-4.8.1/lib/redis/client.rb:409:in `ensure_connected'
E, [2024-08-29T13:47:57.125118 #74] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/redis-4.8.1/lib/redis/client.rb:269:in `block in process'
E, [2024-08-29T13:47:57.125132 #74] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/redis-4.8.1/lib/redis/client.rb:356:in `logging'
E, [2024-08-29T13:47:57.125142 #74] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/redis-4.8.1/lib/redis/client.rb:268:in `process'
E, [2024-08-29T13:47:57.125150 #74] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/redis-4.8.1/lib/redis/client.rb:161:in `call'
E, [2024-08-29T13:47:57.125159 #74] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rack-mini-profiler-3.3.1/lib/mini_profiler/profiling_methods.rb:89:in `block in profile_method'
E, [2024-08-29T13:47:57.125167 #74] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/redis-4.8.1/lib/redis.rb:270:in `block in send_command'
E, [2024-08-29T13:47:57.125181 #74] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/redis-4.8.1/lib/redis.rb:269:in `synchronize'
E, [2024-08-29T13:47:57.125190 #74] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/redis-4.8.1/lib/redis.rb:269:in `send_command'
E, [2024-08-29T13:47:57.125198 #74] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/redis-4.8.1/lib/redis/commands/strings.rb:191:in `get'
E, [2024-08-29T13:47:57.125207 #74] ERROR -- : /var/www/discourse/lib/discourse_redis.rb:148:in `public_send'
E, [2024-08-29T13:47:57.125216 #74] ERROR -- : /var/www/discourse/lib/discourse_redis.rb:148:in `block (3 levels) in <class:DiscourseRedis>'
E, [2024-08-29T13:47:57.125224 #74] ERROR -- : /var/www/discourse/lib/discourse_redis.rb:29:in `ignore_readonly'
E, [2024-08-29T13:47:57.125232 #74] ERROR -- : /var/www/discourse/lib/discourse_redis.rb:148:in `block (2 levels) in <class:DiscourseRedis>'
E, [2024-08-29T13:47:57.125241 #74] ERROR -- : /var/www/discourse/app/jobs/regular/run_heartbeat.rb:16:in `last_heartbeat'
E, [2024-08-29T13:47:57.125264 #74] ERROR -- : config/unicorn.conf.rb:182:in `check_sidekiq_heartbeat'
E, [2024-08-29T13:47:57.125272 #74] ERROR -- : config/unicorn.conf.rb:269:in `master_sleep'
E, [2024-08-29T13:47:57.125283 #74] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/unicorn-6.1.0/lib/unicorn/http_server.rb:295:in `join'
E, [2024-08-29T13:47:57.125291 #74] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/unicorn-6.1.0/bin/unicorn:128:in `<top (required)>'
E, [2024-08-29T13:47:57.125299 #74] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/bin/unicorn:25:in `load'
E, [2024-08-29T13:47:57.125308 #74] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/bin/unicorn:25:in `<main>'
E, [2024-08-29T13:48:07.136412 #74] ERROR -- : master loop error: Error connecting to Redis on localhost:6379 (Redis::TimeoutError) (Redis::CannotConnectError)
E, [2024-08-29T13:48:07.136504 #74] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/redis-4.8.1/lib/redis/client.rb:398:in `rescue in establish_connection'
E, [2024-08-29T13:48:07.136517 #74] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/redis-4.8.1/lib/redis/client.rb:379:in `establish_connection'
E, [2024-08-29T13:48:07.136526 #74] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/redis-4.8.1/lib/redis/client.rb:115:in `block in connect'
E, [2024-08-29T13:48:07.136534 #74] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/redis-4.8.1/lib/redis/client.rb:344:in `with_reconnect'
E, [2024-08-29T13:48:07.136542 #74] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/redis-4.8.1/lib/redis/client.rb:114:in `connect'
E, [2024-08-29T13:48:07.136550 #74] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/redis-4.8.1/lib/redis/client.rb:409:in `ensure_connected'
E, [2024-08-29T13:48:07.136559 #74] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/redis-4.8.1/lib/redis/client.rb:269:in `block in process'
E, [2024-08-29T13:48:07.136567 #74] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/redis-4.8.1/lib/redis/client.rb:356:in `logging'
E, [2024-08-29T13:48:07.136590 #74] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/redis-4.8.1/lib/redis/client.rb:268:in `process'
E, [2024-08-29T13:48:07.136599 #74] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/redis-4.8.1/lib/redis/client.rb:161:in `call'
E, [2024-08-29T13:48:07.136607 #74] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rack-mini-profiler-3.3.1/lib/mini_profiler/profiling_methods.rb:89:in `block in profile_method'
E, [2024-08-29T13:48:07.136615 #74] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/redis-4.8.1/lib/redis.rb:270:in `block in send_command'
E, [2024-08-29T13:48:07.136626 #74] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/redis-4.8.1/lib/redis.rb:269:in `synchronize'
E, [2024-08-29T13:48:07.136638 #74] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/redis-4.8.1/lib/redis.rb:269:in `send_command'
E, [2024-08-29T13:48:07.136646 #74] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/redis-4.8.1/lib/redis/commands/strings.rb:191:in `get'
E, [2024-08-29T13:48:07.136656 #74] ERROR -- : /var/www/discourse/lib/discourse_redis.rb:148:in `public_send'
E, [2024-08-29T13:48:07.136665 #74] ERROR -- : /var/www/discourse/lib/discourse_redis.rb:148:in `block (3 levels) in <class:DiscourseRedis>'
E, [2024-08-29T13:48:07.136674 #74] ERROR -- : /var/www/discourse/lib/discourse_redis.rb:29:in `ignore_readonly'
E, [2024-08-29T13:48:07.136682 #74] ERROR -- : /var/www/discourse/lib/discourse_redis.rb:148:in `block (2 levels) in <class:DiscourseRedis>'
E, [2024-08-29T13:48:07.136690 #74] ERROR -- : /var/www/discourse/app/jobs/regular/run_heartbeat.rb:16:in `last_heartbeat'
E, [2024-08-29T13:48:07.136698 #74] ERROR -- : config/unicorn.conf.rb:182:in `check_sidekiq_heartbeat'
E, [2024-08-29T13:48:07.136707 #74] ERROR -- : config/unicorn.conf.rb:269:in `master_sleep'
E, [2024-08-29T13:48:07.136716 #74] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/unicorn-6.1.0/lib/unicorn/http_server.rb:295:in `join'
E, [2024-08-29T13:48:07.136735 #74] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/unicorn-6.1.0/bin/unicorn:128:in `<top (required)>'
E, [2024-08-29T13:48:07.136744 #74] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/bin/unicorn:25:in `load'
E, [2024-08-29T13:48:07.136752 #74] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/bin/unicorn:25:in `<main>'
1 Like
5

I wonder if it’s worth rebooting the server?

1 Like
6

My understanding is that each ‘app’ container hosts its own Redis server, so there should be no way that one docker container could ‘taint’ another docker container’s Redis server?

Reviewing logs, all the old logs seem to be very boring, some only 20 bytes long.

Just for today, there’s 8.1MB of error messages in unicorn.stdout.log-20240829 which I guess was rotated and fast approaching another 8MB in unicorn.stdout.log.

Corresponding errors in stderr.log:

Failed to report error: Error connecting to Redis on localhost:6379 (Redis::TimeoutError) 3 [default] Error connecting to Redis on localhost:6379 (Redis::TimeoutError)
 
Failed to report error: Error connecting to Redis on localhost:6379 (Redis::TimeoutError) 3 [default] Job exception: Error connecting to Redis on localhost:6379 (Redis::TimeoutError)
 sidekiq-exception
Failed to report error: Error connecting to Redis on localhost:6379 (Redis::TimeoutError) 3 [default] Job exception: Error connecting to Redis on localhost:6379 (Redis::TimeoutError)
 sidekiq-exception
Failed to report error: Error connecting to Redis on localhost:6379 (Redis::TimeoutError) 2 [default] Unexpected error in MiniSchedulerLongRunningJobLogger thread : Redis::CannotConnectError : Error connecting to Redis on localhost:6379 (Redis::TimeoutError)
 discourse-exception
Failed to report error: Error connecting to Redis on localhost:6379 (Redis::TimeoutError) 3 [default] Job exception: Error connecting to Redis on localhost:6379 (Redis::TimeoutError)
 sidekiq-exception
Failed to report error: Error connecting to Redis on localhost:6379 (Redis::TimeoutError) 3 [default] heartbeat: Error connecting to Redis on localhost:6379 (Redis::TimeoutError)
 
Failed to report error: Error connecting to Redis on localhost:6379 (Redis::TimeoutError) 3 [default] Job exception: Error connecting to Redis on localhost:6379 (Redis::TimeoutError)
 sidekiq-exception
Failed to report error: Error connecting to Redis on localhost:6379 (Redis::TimeoutError) 3 [default] Job exception: Error connecting to Redis on localhost:6379 (Redis::TimeoutError)
 sidekiq-exception
Failed to report error: Error connecting to Redis on localhost:6379 (Redis::TimeoutError) 3 [default] Error connecting to Redis on localhost:6379 (Redis::TimeoutError)
 
Failed to report error: Error connecting to Redis on localhost:6379 (Redis::TimeoutError) 2 [default] Unexpected error in MiniSchedulerLongRunningJobLogger thread : Redis::CannotConnectError : Error connecting to Redis on localhost:6379 (Redis::TimeoutError)
 discourse-exception
Failed to report error: Error connecting to Redis on localhost:6379 (Redis::TimeoutError) 3 [default] heartbeat: Error connecting to Redis on localhost:6379 (Redis::TimeoutError)
```

Timing seems to coincide with update.
7

Silly me, the continuing error logs are because the updated docker instance was still running! I stopped the updated docker instance and the logs went quiet again.

I’ll see if restarting it produces the same errors.

8

I think it is the same error as this: Error connecting to Redis

Maybe it is some kind of race condition on start-up?

As an aside, could we get timestamps added to unicorn.stderr.log? That would help in debugging!

9

Are launcher rebuild logs saved anywhere? I wanted to through them to see if there was any clue as to why this happened.

10

No, I believe it’s just printing to console.

You could do

./launcher rebuild app > buildlog.txt

Next time.

11

But they use the same extremely storage, so if you didn’t stop the new one, bad things will happen.

12

Unfortunately, after running for half a day the same problem happened.

Here the docker was rebooted and at the line Thu Aug 29 15:58:34 UTC 2024 was switched live:

I, [2024-08-29T14:13:32.515947 #68]  INFO -- : Refreshing Gem list
I, [2024-08-29T14:13:36.905305 #68]  INFO -- : listening on addr=127.0.0.1:3000 fd=15
I, [2024-08-29T14:13:42.283988 #68]  INFO -- : starting 1 supervised sidekiqs
I, [2024-08-29T14:13:46.693381 #317]  INFO -- : Loading Sidekiq in process id 317
I, [2024-08-29T14:13:47.963367 #356]  INFO -- : worker=0 ready
I, [2024-08-29T14:13:49.811765 #420]  INFO -- : worker=1 ready
I, [2024-08-29T14:13:50.990474 #68]  INFO -- : master process ready
I, [2024-08-29T14:13:51.394171 #538]  INFO -- : worker=2 ready
I, [2024-08-29T14:13:52.632528 #688]  INFO -- : worker=3 ready
I, [2024-08-29T14:13:53.468952 #824]  INFO -- : worker=4 ready
I, [2024-08-29T14:13:54.848829 #945]  INFO -- : worker=5 ready
I, [2024-08-29T14:13:55.276090 #1084]  INFO -- : worker=6 ready
I, [2024-08-29T14:13:55.663733 #1206]  INFO -- : worker=7 ready
*****Thu Aug 29 15:58:34 UTC 2024*****
I, [2024-08-29T16:19:42.701388 #2847461]  INFO -- : Loading Sidekiq in process id 2847461
[STARTED]
'system' has started the backup!
Marking backup as running...

I’m not sure why after Loading Sidekiq in process id 2847461 there were no thte same INFO worker= lines and whether this is significant.

The container ran fine until around midnight when the back upstarted. Here’s the log after the backup is completed (note there is plenty of RAM and disk space):

Finalizing backup...
Creating archive: discourse-2024-08-29-033737-v20240731190511.tar.gz
Making sure archive does not already exist...
Creating empty archive...
Archiving data dump...
Archiving uploads...
Removing tmp '/var/www/discourse/tmp/backups/default/2024-08-29-033737' directory...
Gzipping archive, this may take a while...
Executing the after_create_hook for the backup...
Deleting old backups...
Cleaning stuff up...
Removing '.tar' leftovers...
Marking backup as finished...
Refreshing disk stats...
Finished!
[SUCCESS]
I, [2024-08-29T07:39:13.994558 #74]  INFO -- : Refreshing Gem list
I, [2024-08-29T07:39:22.139288 #74]  INFO -- : listening on addr=127.0.0.1:3000 fd=15
I, [2024-08-29T07:39:28.538100 #74]  INFO -- : starting 1 supervised sidekiqs
I, [2024-08-29T07:39:32.817733 #338]  INFO -- : Loading Sidekiq in process id 338
I, [2024-08-29T07:39:33.888697 #377]  INFO -- : worker=0 ready
I, [2024-08-29T07:39:35.956335 #449]  INFO -- : worker=1 ready
I, [2024-08-29T07:39:37.233970 #74]  INFO -- : master process ready
I, [2024-08-29T07:39:37.437223 #575]  INFO -- : worker=2 ready
I, [2024-08-29T07:39:38.974154 #718]  INFO -- : worker=3 ready
I, [2024-08-29T07:39:39.789086 #842]  INFO -- : worker=4 ready
I, [2024-08-29T07:39:40.417719 #960]  INFO -- : worker=5 ready
I, [2024-08-29T07:39:40.993249 #1084]  INFO -- : worker=6 ready
I, [2024-08-29T07:39:41.395415 #1236]  INFO -- : worker=7 ready
I, [2024-08-29T07:43:38.285891 #74]  INFO -- : master reopening logs...
I, [2024-08-29T07:43:38.288650 #2790085]  INFO -- : Sidekiq reopening logs...
I, [2024-08-29T07:43:38.658839 #454]  INFO -- : worker=1 reopening logs...
I, [2024-08-29T07:43:53.315240 #845]  INFO -- : worker=4 reopening logs...
I, [2024-08-29T07:43:53.315258 #1121415]  INFO -- : worker=0 reopening logs...
I, [2024-08-29T07:43:53.318146 #720]  INFO -- : worker=3 reopening logs...
I, [2024-08-29T07:43:53.318152 #1256]  INFO -- : worker=7 reopening logs...
I, [2024-08-29T07:43:53.319042 #586]  INFO -- : worker=2 reopening logs...
I, [2024-08-29T07:43:53.322139 #960]  INFO -- : worker=5 reopening logs...
I, [2024-08-29T07:43:53.330282 #1109]  INFO -- : worker=6 reopening logs...
E, [2024-08-29T09:24:44.381913 #377] ERROR -- : app error: Connection timed out (Redis::TimeoutError)
E, [2024-08-29T09:24:44.382304 #377] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/redis-4.8.1/lib/redis/connectio
n/ruby.rb:58:in `block in _read_from_socket'
E, [2024-08-29T09:24:44.382516 #377] ERROR -- : <internal:kernel>:187:in `loop'
E, [2024-08-29T09:24:44.382536 #377] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/redis-4.8.1/lib/redis/connectio
n/ruby.rb:54:in `_read_from_socket'
E, [2024-08-29T09:24:44.382687 #377] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/redis-4.8.1/lib/redis/connectio
n/ruby.rb:47:in `gets'
E, [2024-08-29T09:24:44.382782 #377] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/redis-4.8.1/lib/redis/connection/ruby.rb:382:in `read'
E, [2024-08-29T09:24:44.383064 #377] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/redis-4.8.1/lib/redis/client.rb:311:in `block in read'
E, [2024-08-29T09:24:44.383269 #377] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/redis-4.8.1/lib/redis/client.rb:299:in `io'
E, [2024-08-29T09:24:44.383293 #377] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/redis-4.8.1/lib/redis/client.rb:310:in `read'
E, [2024-08-29T09:24:44.383304 #377] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/redis-4.8.1/lib/redis/client.rb:161:in `block in call'
E, [2024-08-29T09:24:44.383313 #377] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/redis-4.8.1/lib/redis/client.rb:279:in `block (2 levels) in process'
E, [2024-08-29T09:24:44.383323 #377] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/redis-4.8.1/lib/redis/client.rb:411:in `ensure_connected'
E, [2024-08-29T09:24:44.383332 #377] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/redis-4.8.1/lib/redis/client.rb:269:in `block in process'
E, [2024-08-29T09:24:44.383341 #377] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/redis-4.8.1/lib/redis/client.rb:356:in `logging'
E, [2024-08-29T09:24:44.383349 #377] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/redis-4.8.1/lib/redis/client.rb:268:in `process'
E, [2024-08-29T09:24:44.383358 #377] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/redis-4.8.1/lib/redis/client.rb:161:in `call'
E, [2024-08-29T09:24:44.383366 #377] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rack-mini-profiler-3.3.1/lib/mini_profiler/profiling_methods.rb:89:in `block in profile_method'
E, [2024-08-29T09:24:44.383375 #377] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/redis-4.8.1/lib/redis.rb:270:in `block in send_command'
E, [2024-08-29T09:24:44.383384 #377] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/redis-4.8.1/lib/redis.rb:269:in `synchronize'
E, [2024-08-29T09:24:44.383407 #377] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/redis-4.8.1/lib/redis.rb:269:in `send_command'
E, [2024-08-29T09:24:44.383416 #377] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/redis-4.8.1/lib/redis/commands/lists.rb:11:in `llen'
E, [2024-08-29T09:24:44.383425 #377] ERROR -- : /var/www/discourse/lib/rate_limiter.rb:192:in `is_under_limit?'
E, [2024-08-29T09:24:44.383434 #377] ERROR -- : /var/www/discourse/lib/rate_limiter.rb:72:in `can_perform?'
E, [2024-08-29T09:24:44.383443 #377] ERROR -- : /var/www/discourse/lib/middleware/request_tracker.rb:488:in `rate_limit'
E, [2024-08-29T09:24:44.383453 #377] ERROR -- : /var/www/discourse/lib/middleware/request_tracker.rb:322:in `call'
E, [2024-08-29T09:24:44.383461 #377] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/actionpack-7.1.4/lib/action_dispatch/middleware/remote_ip.rb:92:in `call'
E, [2024-08-29T09:24:44.383470 #377] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rails_multisite-6.1.0/lib/rails_multisite/middleware.rb:26:in `call'
E, [2024-08-30T05:11:44.698172 #420] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/railties-7.1.4/lib/rails/engine.rb:536:in `call'
E, [2024-08-30T05:11:44.698180 #420] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/railties-7.1.4/lib/rails/railtie.rb:226:in `public_send'
E, [2024-08-30T05:11:44.698189 #420] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/railties-7.1.4/lib/rails/railtie.rb:226:in `method_missing'
E, [2024-08-30T05:11:44.698199 #420] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rack-2.2.9/lib/rack/urlmap.rb:74:in `block in call'
E, [2024-08-30T05:11:44.698207 #420] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rack-2.2.9/lib/rack/urlmap.rb:58:in `each'
E, [2024-08-30T05:11:44.698216 #420] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rack-2.2.9/lib/rack/urlmap.rb:58:in `call'
E, [2024-08-30T05:11:44.698225 #420] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/unicorn-6.1.0/lib/unicorn/http_server.rb:634:in `process_client'
E, [2024-08-30T05:11:44.698233 #420] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/unicorn-6.1.0/lib/unicorn/http_server.rb:739:in `worker_loop'
E, [2024-08-30T05:11:44.698241 #420] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/unicorn-6.1.0/lib/unicorn/http_server.rb:547:in `spawn_missing_workers'
E, [2024-08-30T05:11:44.698261 #420] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/unicorn-6.1.0/lib/unicorn/http_server.rb:143:in `start'
E, [2024-08-30T05:11:44.698270 #420] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/unicorn-6.1.0/bin/unicorn:128:in `<top (required)>'
E, [2024-08-30T05:11:44.698291 #420] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/bin/unicorn:25:in `load'
E, [2024-08-30T05:11:44.698300 #420] ERROR -- : /var/www/discourse/vendor/bundle/ruby/3.3.0/bin/unicorn:25:in `<main>'

After sidekiq is restarted after the backup, within 2 hours the Redis timeout errors begin. Not sure why within 2 hours. Perhaps this could have been the first loading of the site in the morning.

Any ideas? I thought monitoring the startup of the container would be enough, but if the error can be re-triggered after start/stop of sidekiq post-backup, then I need another strategy.

I also found this:

26 E, [2024-08-29T09:25:58.612452 #74] ERROR -- : worker=3 PID:718 running too long (29s), sending USR2 to dump thread backtraces
   27 E, [2024-08-29T09:25:58.612563 #74] ERROR -- : worker=4 PID:842 running too long (29s), sending USR2 to dump thread backtraces
   28 E, [2024-08-29T09:25:58.612587 #74] ERROR -- : worker=5 PID:960 running too long (29s), sending USR2 to dump thread backtraces
   29 E, [2024-08-29T09:25:59.613766 #74] ERROR -- : worker=3 PID:718 running too long (30s), sending USR2 to dump thread backtraces
   30 E, [2024-08-29T09:25:59.613874 #74] ERROR -- : worker=4 PID:842 running too long (30s), sending USR2 to dump thread backtraces
   31 E, [2024-08-29T09:25:59.613897 #74] ERROR -- : worker=5 PID:960 running too long (30s), sending USR2 to dump thread backtraces
   32 E, [2024-08-29T09:25:59.613931 #74] ERROR -- : worker=6 PID:1084 running too long (29s), sending USR2 to dump thread backtraces
13

Is there a way to have the Redis use a different location for the storage e.g. for /var/log/redis so that it is possible to have a container on ‘hot standby’?

14

To have a container on your standby you want separate data and web containers. Then multiple containers can run against the same database and redis.

15

I already use an external database, so I would split the container that is currently web and redis into separate web and redis containers and then have hot backup for web.

So effectively shared DB and redis containers and multiple web containers.

1 Like
16

Do you have experience with separating out Redis and is it a set-up that you’d recommend or caution against? I’m a bit wary of straying too far from standard and not sure if I’ll be walking into any bear traps.

17

You’ve already separated out the database.

Yes, I’ve done it before, both using managed redis and with a redis-only container

2 Likes