How I tried to fix it

Mongoid_cursor_timeout.rb

accounts = %w( 0990000047000 0990000047001 0990000047900 )
("0990000091000" .. "0990000091005").each do |c|
  accounts << c
end
("0990000071000" .. "0990000071019").each do |c|
  accounts << c
end
date = '10-11'
def reprice(accounts,date)
  accounts.each do |acc|
    Mongoid.database['journals'].find({'account' => acc, 'date' => Regexp.new("^#{date}")}, :timeout => false ) do |query_cursor|
      Mongoid::Cursor.new(Journal,Journal,query_cursor).each do |j|
        j.billing_entries.each do |entry|
          cdr = Cdr.where(:icid => entry.icid).first
          destination = Destination.resolve(cdr)
          price_hash = Pricer::Calculator.get_price(cdr, destination)
          entry.update_attributes({:destination => destination.label}.merge(price_hash))
        end
      end
    end
  end
end