Error: "There are 965 email jobs that failed. Check your app.yml and ensure that the mail server settings are correct."

Hi there, woke up this morning to some sort of email error. My Discourse seemed to be running fine until this.

In Sidekiq, I get many errors such as this:

"16 	default 	Jobs::UserEmail 	
{"type"=>"digest", "user_id"=>8, "current_site_id"=>"default"}

Jobs::HandledExceptionWrapper: Wrapped SocketError: getaddrinfo: No address associated with hostname"

Also this one:

"5 	default 	Jobs::VersionCheck 	
Jobs::HandledExceptionWrapper: Wrapped SocketError: Failed to open TCP connection to (getaddrinfo: No address associated with hostname)"

I’m not sure how to access the app.yml to check. Can’t seem to find it.

Thanks for your help!

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Kinda looks like your server lost DNS service at some point overnight…

When was the last job that failed? Have more recent jobs succeeded?

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Thanks for the response, more recent jobs don’t seem to be working. Tried to set up a new account and received an error instead of getting a successful email. What’s strange is that I did not do any work on the site recently or change settings.

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Can you log into your server via SSH? If so, try running


and see if that works.

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Yes, ping seems to work fine,

Hmm, if the jobs are still failing then I’m not really sure what to suggest. You could try running one manually by going to sidekiq, “scheduler”, then find “Jobs::VersionCheck” and click “Trigger”.

The app.yml file is at /var/discourse/containers/app.yml, but since the errors are with the DNS resolution I’m not sure that’ll help.


Yes, that trigger failed as well. I have found my app.yml file and can’t see anything that stands out that would cause failure.

Again, I appreciate your help.

Maybe try looking up the exact domain name that’s failing? So:


You should get something like is an alias for has address has IPv6 address 2001:470:1:3a8::251
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sorry, where would I check that?

SSH into the server and run


(the same way you did ping earlier)

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Ah yes, I get what you said I should get as a result

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Other than trying a reboot on your server, I’m not sure I have any other suggestions - sorry. :frowning:

Hopefully someone else will have some ideas.

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Well, I should have started with the old turn it off and on routine. That seemed to work and emails are coming through. Thanks very much for your help. Major kudos!