Heroku Memcache问题- Dalli::NetworkError: localhost:11211已关闭

Question

我最近将Rails升级到了3.2.2，现在我似乎遇到了Memcache相关的问题……有人能帮上忙吗？

我的生产配置：

config.serve_static_assets = true
config.static_cache_control = "public, max-age=2592000"
config.assets.digest = true
config.action_controller.perform_caching = true
config.cache_store = :dalli_store
config.action_dispatch.rack_cache = {
 :metastore    => Dalli::Client.new,
 :entitystore  => 'file:tmp/cache/rack/body',
 :allow_reload => false
}

Dalli gem在捆绑包中

gem 'dalli'

我已经通过herokus GUI添加了memcache插件。

我的Procfile是这样的(也安装了‘瘦’gem )：

web: bundle exec rails server -p $PORT thin -e $RACK_ENV

但是，即使我尝试在控制台中执行简单的缓存维护，我也会收到这些错误：

Loading production environment (Rails 3.2.2)
irb(main):001:0> dc = Dalli::Client.new('localhost:11211')
=> #<Dalli::Client:0x00000007501980 @servers="localhost:11211", @options={}, @ring=nil>
irb(main):002:0> dc.flush_all
localhost:11211 failed (count: 0)
Dalli::NetworkError: localhost:11211 is down:  
    from /app/vendor/bundle/ruby/1.9.1/gems/dalli-2.2.1/lib/dalli/server.rb:47:in `request'
    from /app/vendor/bundle/ruby/1.9.1/gems/dalli-2.2.1/lib/dalli/options.rb:18:in `block in request'
    from /usr/local/lib/ruby/1.9.1/monitor.rb:201:in `mon_synchronize'
    from /app/vendor/bundle/ruby/1.9.1/gems/dalli-2.2.1/lib/dalli/options.rb:17:in `request'
    from /app/vendor/bundle/ruby/1.9.1/gems/dalli-2.2.1/lib/dalli/client.rb:158:in `block in flush'
    from /app/vendor/bundle/ruby/1.9.1/gems/dalli-2.2.1/lib/dalli/client.rb:158:in `map'
    from /app/vendor/bundle/ruby/1.9.1/gems/dalli-2.2.1/lib/dalli/client.rb:158:in `flush'
    from (irb):2
    from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.2/lib/rails/commands/console.rb:47:in `start'
    from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.2/lib/rails/commands/console.rb:8:in `start'
    from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.2/lib/rails/commands.rb:41:in `<top (required)>'
    from script/rails:6:in `require'
    from script/rails:6:in `<main>'

当然，资产服务也在失败：

2012-09-29T02:26:29+00:00 app[web.3]: cache error: No server available
2012-09-29T02:26:29+00:00 app[web.3]: /app/vendor/bundle/ruby/1.9.1/gems/thin-1.4.1/lib/thin/connection.rb:80:in `block in pre_process'
2012-09-29T02:26:29+00:00 app[web.3]: /app/vendor/bundle/ruby/1.9.1/gems/eventmachine-1.0.0/lib/eventmachine.rb:187:in `run_machine'
2012-09-29T02:26:29+00:00 app[web.3]: /app/vendor/bundle/ruby/1.9.1/gems/rack-1.4.1/lib/rack/handler/thin.rb:13:in `run'
2012-09-29T02:26:29+00:00 app[web.3]: /app/vendor/bundle/ruby/1.9.1/gems/rack-1.4.1/lib/rack/server.rb:265:in `start'
2012-09-29T02:26:29+00:00 app[web.3]: /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.2/lib/rails/commands/server.rb:70:in `start'

这是我的配置有问题吗？这是Heroku的问题吗？

Answer 1

删除它，因为它在默认情况下设置为那些东西...

config.action_dispatch.rack_cache = {
 :metastore    => Dalli::Client.new,
 :entitystore  => 'file:tmp/cache/rack/body',
 :allow_reload => false
}

...once你要确保你的dalli版本有这个最新版本的commit。