NameError: uninitialized constant Mail::Parsers::AddressStruct
This looks like an autoload issue as described in https://github.com/mikel/mail/issues/912. Consider just adding to Sidekiq initializer:
Mail.eager_autoload!
https://sentry.gitlap.com/gitlab/gitlabcom/issues/7463/
NameError: uninitialized constant Mail::Parsers::AddressStruct
app/mailers/base_mailer.rb:18:in `new'
address = Mail::Address.new(Gitlab.config.gitlab.email_from)
app/mailers/base_mailer.rb:18:in `default_sender_address'
address = Mail::Address.new(Gitlab.config.gitlab.email_from)
app/mailers/notify.rb:54:in `sender'
address = default_sender_address
app/mailers/emails/notes.rb:47:in `note_thread_options'
from: sender(@note.author_id),
lib/gitlab/metrics/instrumentation.rb:156:in `note_thread_options'
retval = super
...
(99 additional frame(s) were not displayed)