"There are email jobs that failed" on an SMTP-less install

Canapin · January 28, 2026, 7:16pm

I got this message on my dashboard:

There are 95 email jobs that failed. Check your app.yml and ensure that the mail server settings are correct.

The site is an SMTP-less install on a discourse.diy domain.

Sidekiq shows:

Next Retry	Retry Count	Queue	Job	Arguments	Error
right now	0	default	Jobs::CallDiscourseHub	{}	Jobs::HandledExceptionWrapper: Wrapped TypeError: Unsupported command argument type: TrueClass
in 2 minutes	5	low	Jobs::UserEmail	{“type”=>“digest”,“user_id”=>2,“current_site_id”=>“default”}	Jobs::HandledExceptionWrapper: Wrapped ArgumentError: :arguments expected to be an Array of individual string args
in 3 minutes	7	low	Jobs::UserEmail	{“type”=>“digest”,“user_id”=>2,“current_site_id”=>“default”}	Jobs::HandledExceptionWrapper: Wrapped ArgumentError: :arguments expected to be an Array of individual string args
in 9 minutes	9	low	Jobs::UserEmail	{“type”=>“digest”,“user_id”=>2,“current_site_id”=>“default”}	Jobs::HandledExceptionWrapper: Wrapped ArgumentError: :arguments expected to be an Array of individual string args
in 12 minutes	12	low	Jobs::UserEmail	{“type”=>“digest”,“user_id”=>2,“current_site_id”=>“default”}	Jobs::HandledExceptionWrapper: Wrapped ArgumentError: :arguments expected to be an Array of individual string args
in 15 minutes	13	low	Jobs::UserEmail	{“type”=>“digest”,“user_id”=>2,“current_site_id”=>“default”}	Jobs::HandledExceptionWrapper: Wrapped ArgumentError: :arguments expected to be an Array of individual string args
…	…	…	…	…	…

The site is on 2026.1.0-latest (0caa6e34fe)

Is it expected?

pmusaraj · January 28, 2026, 7:26pm

Thanks for posting!

That email doesn’t work is expected, but the errors you are seeing are unusual. They might be due to something else in your setup.

When I try to send an invite on my test self-hosted instance, I see this error:

Jobs::HandledExceptionWrapper: Wrapped Socket::ResolutionError: getaddrinfo: No address associated with hostname

And this notice in the dashboard

Also, the failure on this one is not related to email. Do you have more info on this from /logs?

Canapin · January 28, 2026, 7:32pm

There are two types of logged errors:

One Job exception: Unsupported command argument type: TrueClass

redis-client-0.26.1/lib/redis_client/command_builder.rb:37:in `block in generate' 
redis-client-0.26.1/lib/redis_client/command_builder.rb:28:in `map!' 
redis-client-0.26.1/lib/redis_client/command_builder.rb:28:in `generate' 
redis-client-0.26.1/lib/redis_client.rb:351:in `call_v' 
redis-5.4.0/lib/redis/client.rb:90:in `call_v' 
rack-mini-profiler-4.0.1/lib/mini_profiler/profiling_methods.rb:90:in `block in profile_method' 
redis-5.4.0/lib/redis.rb:152:in `block in send_command' 
redis-5.4.0/lib/redis.rb:151:in `synchronize' 
redis-5.4.0/lib/redis.rb:151:in `send_command' 
redis-5.4.0/lib/redis/commands/hashes.rb:51:in `hmset' 
redis-5.4.0/lib/redis/commands/hashes.rb:66:in `mapped_hmset' 
/var/www/discourse/lib/discourse_redis.rb:144:in `public_send' 
/var/www/discourse/lib/discourse_redis.rb:144:in `block (3 levels) in <class:DiscourseRedis>' 
/var/www/discourse/lib/discourse_redis.rb:29:in `ignore_readonly' 
/var/www/discourse/lib/discourse_redis.rb:144:in `block (2 levels) in <class:DiscourseRedis>' 
/var/www/discourse/lib/discourse_updates.rb:116:in `block in missing_versions=' 
/var/www/discourse/lib/discourse_updates.rb:114:in `each' 
/var/www/discourse/lib/discourse_updates.rb:114:in `missing_versions=' 
/var/www/discourse/app/jobs/scheduled/call_discourse_hub.rb:19:in `execute' 
/var/www/discourse/app/jobs/base.rb:318:in `block (2 levels) in perform' 
rails_multisite-7.0.0/lib/rails_multisite/connection_management/null_instance.rb:49:in `with_connection'
rails_multisite-7.0.0/lib/rails_multisite/connection_management.rb:17:in `with_connection'
/var/www/discourse/app/jobs/base.rb:305:in `block in perform' 
/var/www/discourse/app/jobs/base.rb:301:in `each' 
/var/www/discourse/app/jobs/base.rb:301:in `perform' 
/var/www/discourse/app/jobs/base.rb:381:in `perform' 
sidekiq-7.3.9/lib/sidekiq/processor.rb:220:in `execute_job' 
sidekiq-7.3.9/lib/sidekiq/processor.rb:185:in `block (4 levels) in process' 
sidekiq-7.3.9/lib/sidekiq/middleware/chain.rb:180:in `traverse' 
sidekiq-7.3.9/lib/sidekiq/middleware/chain.rb:183:in `block in traverse' 
/var/www/discourse/lib/sidekiq/suppress_user_email_errors.rb:6:in `call' 
sidekiq-7.3.9/lib/sidekiq/middleware/chain.rb:182:in `traverse' 
sidekiq-7.3.9/lib/sidekiq/middleware/chain.rb:183:in `block in traverse' 
/var/www/discourse/lib/sidekiq/discourse_event.rb:6:in `call' 
sidekiq-7.3.9/lib/sidekiq/middleware/chain.rb:182:in `traverse' 
sidekiq-7.3.9/lib/sidekiq/middleware/chain.rb:183:in `block in traverse' 
/var/www/discourse/lib/sidekiq/pausable.rb:131:in `call' 
sidekiq-7.3.9/lib/sidekiq/middleware/chain.rb:182:in `traverse' 
sidekiq-7.3.9/lib/sidekiq/middleware/chain.rb:183:in `block in traverse' 
sidekiq-7.3.9/lib/sidekiq/job/interrupt_handler.rb:9:in `call' 
sidekiq-7.3.9/lib/sidekiq/middleware/chain.rb:182:in `traverse' 
sidekiq-7.3.9/lib/sidekiq/middleware/chain.rb:183:in `block in traverse' 
sidekiq-7.3.9/lib/sidekiq/metrics/tracking.rb:26:in `track' 
sidekiq-7.3.9/lib/sidekiq/metrics/tracking.rb:134:in `call' 
sidekiq-7.3.9/lib/sidekiq/middleware/chain.rb:182:in `traverse' 
sidekiq-7.3.9/lib/sidekiq/middleware/chain.rb:173:in `invoke' 
sidekiq-7.3.9/lib/sidekiq/processor.rb:184:in `block (3 levels) in process' 
sidekiq-7.3.9/lib/sidekiq/processor.rb:145:in `block (6 levels) in dispatch' 
sidekiq-7.3.9/lib/sidekiq/job_retry.rb:118:in `local' 
sidekiq-7.3.9/lib/sidekiq/processor.rb:144:in `block (5 levels) in dispatch' 
sidekiq-7.3.9/lib/sidekiq/config.rb:39:in `block in <class:Config>' 
sidekiq-7.3.9/lib/sidekiq/processor.rb:139:in `block (4 levels) in dispatch' 
sidekiq-7.3.9/lib/sidekiq/processor.rb:281:in `stats' 
sidekiq-7.3.9/lib/sidekiq/processor.rb:134:in `block (3 levels) in dispatch' 
sidekiq-7.3.9/lib/sidekiq/job_logger.rb:15:in `call' 
sidekiq-7.3.9/lib/sidekiq/processor.rb:133:in `block (2 levels) in dispatch' 
sidekiq-7.3.9/lib/sidekiq/job_retry.rb:85:in `global' 
sidekiq-7.3.9/lib/sidekiq/processor.rb:132:in `block in dispatch' 
sidekiq-7.3.9/lib/sidekiq/job_logger.rb:40:in `prepare' 
sidekiq-7.3.9/lib/sidekiq/processor.rb:131:in `dispatch' 
sidekiq-7.3.9/lib/sidekiq/processor.rb:183:in `block (2 levels) in process' 
sidekiq-7.3.9/lib/sidekiq/processor.rb:182:in `handle_interrupt' 
sidekiq-7.3.9/lib/sidekiq/processor.rb:182:in `block in process' 
sidekiq-7.3.9/lib/sidekiq/processor.rb:181:in `handle_interrupt' 
sidekiq-7.3.9/lib/sidekiq/processor.rb:181:in `process' 
sidekiq-7.3.9/lib/sidekiq/processor.rb:86:in `process_one' 
sidekiq-7.3.9/lib/sidekiq/processor.rb:76:in `run' 
sidekiq-7.3.9/lib/sidekiq/component.rb:10:in `watchdog' 
sidekiq-7.3.9/lib/sidekiq/component.rb:19:in `block in safe_thread'

And 1300 Job exception: :arguments expected to be an Array of individual string args:

mail-2.9.0/lib/mail/network/delivery_methods/sendmail.rb:53:in `initialize' 
mail-2.9.0/lib/mail/message.rb:278:in `new' 
mail-2.9.0/lib/mail/message.rb:278:in `delivery_method' 
actionmailer-8.0.4/lib/action_mailer/delivery_methods.rb:66:in `wrap_delivery_behavior' 
actionmailer-8.0.4/lib/action_mailer/delivery_methods.rb:80:in `wrap_delivery_behavior!' 
actionmailer-8.0.4/lib/action_mailer/base.rb:876:in `mail' 
/var/www/discourse/lib/email/build_email_helper.rb:8:in `build_email' 
/var/www/discourse/app/mailers/user_notifications.rb:369:in `digest' 
actionpack-8.0.4/lib/abstract_controller/base.rb:215:in `process_action' 
actionpack-8.0.4/lib/abstract_controller/callbacks.rb:261:in `block in process_action' 
activesupport-8.0.4/lib/active_support/callbacks.rb:100:in `run_callbacks' 
actionpack-8.0.4/lib/abstract_controller/callbacks.rb:260:in `process_action' 
actionpack-8.0.4/lib/abstract_controller/base.rb:152:in `process' 
actionmailer-8.0.4/lib/action_mailer/rescuable.rb:29:in `block in process' 
actionmailer-8.0.4/lib/action_mailer/rescuable.rb:21:in `handle_exceptions' 
actionmailer-8.0.4/lib/action_mailer/rescuable.rb:28:in `process' 
actionview-8.0.4/lib/action_view/rendering.rb:40:in `process' 
actionmailer-8.0.4/lib/action_mailer/base.rb:652:in `block in process' 
activesupport-8.0.4/lib/active_support/notifications.rb:212:in `instrument' 
actionmailer-8.0.4/lib/action_mailer/base.rb:651:in `process' 
actionmailer-8.0.4/lib/action_mailer/message_delivery.rb:136:in `block in processed_mailer' 
<internal:kernel>:90:in `tap'
actionmailer-8.0.4/lib/action_mailer/message_delivery.rb:135:in `processed_mailer' 
actionmailer-8.0.4/lib/action_mailer/message_delivery.rb:32:in `__getobj__' 
/usr/local/lib/ruby/3.3.0/delegate.rb:84:in `method_missing'
/var/www/discourse/lib/email/sender.rb:51:in `send' 
/var/www/discourse/app/jobs/regular/user_email.rb:80:in `send_user_email' 
/var/www/discourse/app/jobs/regular/user_email.rb:40:in `execute' 
/var/www/discourse/app/jobs/base.rb:318:in `block (2 levels) in perform' 
rails_multisite-7.0.0/lib/rails_multisite/connection_management/null_instance.rb:49:in `with_connection'
rails_multisite-7.0.0/lib/rails_multisite/connection_management.rb:17:in `with_connection'
/var/www/discourse/app/jobs/base.rb:305:in `block in perform' 
/var/www/discourse/app/jobs/base.rb:301:in `each' 
/var/www/discourse/app/jobs/base.rb:301:in `perform' 
sidekiq-7.3.9/lib/sidekiq/processor.rb:220:in `execute_job' 
sidekiq-7.3.9/lib/sidekiq/processor.rb:185:in `block (4 levels) in process' 
sidekiq-7.3.9/lib/sidekiq/middleware/chain.rb:180:in `traverse' 
sidekiq-7.3.9/lib/sidekiq/middleware/chain.rb:183:in `block in traverse' 
/var/www/discourse/lib/sidekiq/suppress_user_email_errors.rb:6:in `call' 
sidekiq-7.3.9/lib/sidekiq/middleware/chain.rb:182:in `traverse' 
sidekiq-7.3.9/lib/sidekiq/middleware/chain.rb:183:in `block in traverse' 
/var/www/discourse/lib/sidekiq/discourse_event.rb:6:in `call' 
sidekiq-7.3.9/lib/sidekiq/middleware/chain.rb:182:in `traverse' 
sidekiq-7.3.9/lib/sidekiq/middleware/chain.rb:183:in `block in traverse' 
/var/www/discourse/lib/sidekiq/pausable.rb:131:in `call' 
sidekiq-7.3.9/lib/sidekiq/middleware/chain.rb:182:in `traverse' 
sidekiq-7.3.9/lib/sidekiq/middleware/chain.rb:183:in `block in traverse' 
sidekiq-7.3.9/lib/sidekiq/job/interrupt_handler.rb:9:in `call' 
sidekiq-7.3.9/lib/sidekiq/middleware/chain.rb:182:in `traverse' 
sidekiq-7.3.9/lib/sidekiq/middleware/chain.rb:183:in `block in traverse' 
sidekiq-7.3.9/lib/sidekiq/metrics/tracking.rb:26:in `track' 
sidekiq-7.3.9/lib/sidekiq/metrics/tracking.rb:134:in `call' 
sidekiq-7.3.9/lib/sidekiq/middleware/chain.rb:182:in `traverse' 
sidekiq-7.3.9/lib/sidekiq/middleware/chain.rb:173:in `invoke' 
sidekiq-7.3.9/lib/sidekiq/processor.rb:184:in `block (3 levels) in process' 
sidekiq-7.3.9/lib/sidekiq/processor.rb:145:in `block (6 levels) in dispatch' 
sidekiq-7.3.9/lib/sidekiq/job_retry.rb:118:in `local' 
sidekiq-7.3.9/lib/sidekiq/processor.rb:144:in `block (5 levels) in dispatch' 
sidekiq-7.3.9/lib/sidekiq/config.rb:39:in `block in <class:Config>' 
sidekiq-7.3.9/lib/sidekiq/processor.rb:139:in `block (4 levels) in dispatch' 
sidekiq-7.3.9/lib/sidekiq/processor.rb:281:in `stats' 
sidekiq-7.3.9/lib/sidekiq/processor.rb:134:in `block (3 levels) in dispatch' 
sidekiq-7.3.9/lib/sidekiq/job_logger.rb:15:in `call' 
sidekiq-7.3.9/lib/sidekiq/processor.rb:133:in `block (2 levels) in dispatch' 
sidekiq-7.3.9/lib/sidekiq/job_retry.rb:85:in `global' 
sidekiq-7.3.9/lib/sidekiq/processor.rb:132:in `block in dispatch' 
sidekiq-7.3.9/lib/sidekiq/job_logger.rb:40:in `prepare' 
sidekiq-7.3.9/lib/sidekiq/processor.rb:131:in `dispatch' 
sidekiq-7.3.9/lib/sidekiq/processor.rb:183:in `block (2 levels) in process' 
sidekiq-7.3.9/lib/sidekiq/processor.rb:182:in `handle_interrupt' 
sidekiq-7.3.9/lib/sidekiq/processor.rb:182:in `block in process' 
sidekiq-7.3.9/lib/sidekiq/processor.rb:181:in `handle_interrupt' 
sidekiq-7.3.9/lib/sidekiq/processor.rb:181:in `process' 
sidekiq-7.3.9/lib/sidekiq/processor.rb:86:in `process_one' 
sidekiq-7.3.9/lib/sidekiq/processor.rb:76:in `run' 
sidekiq-7.3.9/lib/sidekiq/component.rb:10:in `watchdog' 
sidekiq-7.3.9/lib/sidekiq/component.rb:19:in `block in safe_thread'

I have two custom plugins installed on this instance, I can remove them and see if you think the errors can originate from here.

pmusaraj · January 28, 2026, 7:48pm

Hmm, neither look related to a plugin. I’ll update my instance (it’s 3 weeks old) and see if I see the same issues.

Falco · February 19, 2026, 5:41pm

I guess Disable emails must be yes on those.

Canapin · February 19, 2026, 6:49pm

Right that might be the cause. It should be automatically set to ~~“No”~~ “Yes” when installing without SMTP I guess?

Falco · February 19, 2026, 6:57pm

You mean Yes, as the setting is to “Disable”.

It should yes, but when you do that there is a super annoying global banner screaming that emails are disabled.

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"There are email jobs that failed" on an SMTP-less install

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