mailroom (mail_room) stopped processing emails after some period of time (period could be 1 day)
Original title: mailroom periodically crashes
with the following backtrace:
/usr/lib/ruby/2.2.0/net/imap.rb:1057:in `initialize': getaddrinfo: Temporary failure in name resolution (SocketError)
from /usr/lib/ruby/2.2.0/net/imap.rb:1057:in `open'
from /usr/lib/ruby/2.2.0/net/imap.rb:1057:in `initialize'
from /home/git/gitlab/vendor/bundle/ruby/2.2.0/gems/mail_room-0.6.1/lib/mail_room/mailbox_watcher.rb:20:in `new'
from /home/git/gitlab/vendor/bundle/ruby/2.2.0/gems/mail_room-0.6.1/lib/mail_room/mailbox_watcher.rb:20:in `imap'
from /home/git/gitlab/vendor/bundle/ruby/2.2.0/gems/mail_room-0.6.1/lib/mail_room/mailbox_watcher.rb:88:in `log_in'
from /home/git/gitlab/vendor/bundle/ruby/2.2.0/gems/mail_room-0.6.1/lib/mail_room/mailbox_watcher.rb:69:in `setup'
from /home/git/gitlab/vendor/bundle/ruby/2.2.0/gems/mail_room-0.6.1/lib/mail_room/mailbox_watcher.rb:149:in `rescue in block in run'
from /home/git/gitlab/vendor/bundle/ruby/2.2.0/gems/mail_room-0.6.1/lib/mail_room/mailbox_watcher.rb:141:in `block in run'