VM の再起動後、データにアクセスしようとすると常にこのエラーが発生します。Rails 3.2.3 と Mongodb w/Mongoid を使用しています。これは MongoDB と Mongoid を使用する私の最初のプロジェクトであり、この問題が何かに関係していると確信しています。Mongo が起動して実行されているようです。完全なエラー メッセージは次のとおりです。
NoMethodError: undefined method `-' for nil:NilClass
from /home/development/.rvm/gems/ruby-1.9.3-p0@applicationName/gems/moped-1.2.5/lib/moped/cluster.rb:118:in `block in refresh'
from /home/development/.rvm/gems/ruby-1.9.3-p0@applicationName/gems/moped-1.2.5/lib/moped/cluster.rb:125:in `each'
from /home/development/.rvm/gems/ruby-1.9.3-p0@applicationName/gems/moped-1.2.5/lib/moped/cluster.rb:125:in `refresh'
from /home/development/.rvm/gems/ruby-1.9.3-p0@applicationName/gems/moped-1.2.5/lib/moped/cluster.rb:78:in `nodes'
from /home/development/.rvm/gems/ruby-1.9.3-p0@applicationName/gems/moped-1.2.5/lib/moped/cluster.rb:187:in `with_secondary'
from /home/development/.rvm/gems/ruby-1.9.3-p0@applicationName/gems/moped-1.2.5/lib/moped/session/context.rb:104:in `with_node'
from /home/development/.rvm/gems/ruby-1.9.3-p0@applicationName/gems/moped-1.2.5/lib/moped/session/context.rb:43:in `query'
from /home/development/.rvm/gems/ruby-1.9.3-p0@applicationName/gems/moped-1.2.5/lib/moped/query.rb:109:in `first'
from /home/development/.rvm/gems/ruby-1.9.3-p0@applicationName/gems/mongoid-3.0.6/lib/mongoid/contextual/mongo.rb:201:in `first'
from /home/development/.rvm/gems/ruby-1.9.3-p0@applicationName/gems/mongoid-3.0.6/lib/mongoid/contextual.rb:18:in `first'
from /home/development/.rvm/gems/ruby-1.9.3-p0@applicationName/gems/mongoid-3.0.6/lib/mongoid/finders.rb:119:in `first'
from (irb):3
from /home/development/.rvm/gems/ruby-1.9.3-p0@applicationName/gems/railties-3.2.8/lib/rails/commands/console.rb:47:in `start'
from /home/development/.rvm/gems/ruby-1.9.3-p0@applicationName/gems/railties-3.2.8/lib/rails/commands/console.rb:8:in `start'
from /home/development/.rvm/gems/ruby-1.9.3-p0@applicationName/gems/railties-3.2.8/lib/rails/commands.rb:41:in `<top (required)>'