Ruby脚本’杀了’

当我运行它时,我收到一条简单的“被杀”消息.这是怎么回事？我怎样才能找出问题所在？

我在EC2微实例上使用它.

谢谢

这是脚本

require 'open-uri'
require 'zlib'
require 'json'

require_relative '../db/db.rb'

dl = open('........')
ex = Zlib::GzipReader.new dl
json = JSON.parse ex.read
events = json['resultsPage']['results']['event']

puts "starting to parse #{events.count} event(s)..."
created = 0
updated = 0

events[1..10].each do |event|
    performances = event['performance']
    performances.each do  |performance|
        ar_show = Show.find_or_initialize_by_songkick_id performance['id']
        ar_show.artist_name = performance['displayName']
        ar_show.new_record? ? created += 1 : updated += 1
        ar_show.save!
    end
end

Import.create :updated => updated,:new => created
puts "complete. new: #{created}   -   updated: #{updated}"