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Rails、Passenger和Memcached:初始化期间找不到服务器

passenger memcached ruby-on-rails
  •  6
  • Rodney  · 技术社区  · 16 年前

    我希望有人能帮我解决一个我确信是用户错误的问题。

    下面的配置细节适用于我的所有其他环境,包括集成、开发和QA。但是,生产服务器会给出以下错误: 

    <ActionController::Session::MemCacheStore:0x2b45f6acb248> unable to find server during initialization.

    当我从有问题的服务器telnet到memcached框并运行“stats”时,我得到: 

    STAT pid 16136  
STAT uptime 7398638  
STAT time 1275059978    
STAT version 1.2.8    
STAT pointer_size 64  
STAT rusage_user 7.085922  
STAT rusage_system 13.275981  
STAT curr_items 10878  
STAT total_items 11441  
STAT bytes 2020180  
STAT curr_connections 5  
STAT total_connections 306  
STAT connection_structures 11  
STAT cmd_flush 0  
STAT cmd_get 457326  
STAT cmd_set 11441  
STAT get_hits 412184  
STAT get_misses 45142  
STAT evictions 0  
STAT bytes_read 22600329  
STAT bytes_written 53036649  
STAT limit_maxbytes 30064771072  
STAT threads 5  
STAT accepting_conns 1  
STAT listen_disabled_num 0

    下面是配置详细信息和stacktrace。

    config/environment.rb(重要部分): 

    config.action_controller.session_store = :mem_cache_store  
config.gem "memcache-client", :lib => 'memcache'

    config/environments/production.rb: 

    config.cache_store = :mem_cache_store

require 'memcache'  

# Caching  
# Memcached configuration  
memcache_options = {  
  :c_threshold => 100_000,  
  :compression => true,  
  :debug => false,  
  :namespace => 'gucci',  
  :readonly => false,  
  :urlencode => false,  
  :multithread => true  
}  

CACHE = MemCache.new memcache_options  
CACHE.servers = ['10.x.x.x:11211']

    Stacktrace: 

    /var/www/oro/production/releases/20100528130253/vendor/rails/actionpack/lib/action_controller/session/mem_cache_store.rb    20      in `initialize'  
1   /var/www/oro/production/releases/20100528130253/vendor/rails/actionpack/lib/action_controller/middleware_stack.rb   72  in `new'  
2   /var/www/oro/production/releases/20100528130253/vendor/rails/actionpack/lib/action_controller/middleware_stack.rb   72  in `build'  
3   /var/www/oro/production/releases/20100528130253/vendor/rails/actionpack/lib/action_controller/middleware_stack.rb   116     in `build'  
4   /var/www/oro/production/releases/20100528130253/vendor/rails/activesupport/lib/active_support/inflector.rb  361     in `inject'  
5   /var/www/oro/production/releases/20100528130253/vendor/rails/actionpack/lib/action_controller/middleware_stack.rb   116     in `each'  
6   /var/www/oro/production/releases/20100528130253/vendor/rails/actionpack/lib/action_controller/middleware_stack.rb   116     in `inject'  
7   /var/www/oro/production/releases/20100528130253/vendor/rails/actionpack/lib/action_controller/middleware_stack.rb   116     in `build'  
8   /var/www/oro/production/releases/20100528130253/vendor/rails/actionpack/lib/action_controller/dispatcher.rb     130     in `build_middleware_stack'  
9   /var/www/oro/production/releases/20100528130253/vendor/rails/actionpack/lib/action_controller/dispatcher.rb     81  in `initialize'  
10  /var/www/oro/production/releases/20100528130253/vendor/rails/actionpack/lib/action_controller/dispatcher.rb     51  in `new'  
11  /var/www/oro/production/releases/20100528130253/vendor/rails/actionpack/lib/action_controller/dispatcher.rb     51  in `run_prepare_callbacks'  
12  /var/www/oro/production/releases/20100528130253/vendor/rails/railties/lib/initializer.rb    631     in `prepare_dispatcher'  
13  /var/www/oro/production/releases/20100528130253/vendor/rails/railties/lib/initializer.rb    185     in `process'  
14  /var/www/oro/production/releases/20100528130253/vendor/rails/railties/lib/initializer.rb    113     in `send'  
15  /var/www/oro/production/releases/20100528130253/vendor/rails/railties/lib/initializer.rb    113     in `run'  
16  /var/www/oro/production/releases/20100528130253/config/environment.rb   29  
17  /usr/local//lib/ruby/site_ruby/1.8/rubygems/custom_require.rb   31  in `gem_original_require'  
18  /usr/local//lib/ruby/site_ruby/1.8/rubygems/custom_require.rb   31  in `require'
19  /usr/local/lib/ruby/gems/1.8/gems/passenger-2.2.10/lib/phusion_passenger/railz/application_spawner.rb   303     in `preload_application'  
20  /usr/local/lib/ruby/gems/1.8/gems/passenger-2.2.10/lib/phusion_passenger/railz/application_spawner.rb   252     in `initialize_server'  
21  /usr/local/lib/ruby/gems/1.8/gems/passenger-2.2.10/lib/phusion_passenger/utils.rb   255     in `report_app_init_status'  
22  /usr/local/lib/ruby/gems/1.8/gems/passenger-2.2.10/lib/phusion_passenger/railz/application_spawner.rb   237     in `initialize_server'  
23  /usr/local/lib/ruby/gems/1.8/gems/passenger-2.2.10/lib/phusion_passenger/abstract_server.rb     194     in `start_synchronously'  
24  /usr/local/lib/ruby/gems/1.8/gems/passenger-2.2.10/lib/phusion_passenger/abstract_server.rb     163     in `start'  
25  /usr/local/lib/ruby/gems/1.8/gems/passenger-2.2.10/lib/phusion_passenger/railz/application_spawner.rb   213     in `start'  
26  /usr/local/lib/ruby/gems/1.8/gems/passenger-2.2.10/lib/phusion_passenger/spawn_manager.rb   262     in `spawn_rails_application'  
27  /usr/local/lib/ruby/gems/1.8/gems/passenger-2.2.10/lib/phusion_passenger/abstract_server_collection.rb  126     in `lookup_or_add'  
28  /usr/local/lib/ruby/gems/1.8/gems/passenger-2.2.10/lib/phusion_passenger/spawn_manager.rb   256     in `spawn_rails_application'  
29  /usr/local/lib/ruby/gems/1.8/gems/passenger-2.2.10/lib/phusion_passenger/abstract_server_collection.rb  80  in `synchronize'  
30  /usr/local/lib/ruby/gems/1.8/gems/passenger-2.2.10/lib/phusion_passenger/abstract_server_collection.rb  79  in `synchronize'  
31  /usr/local/lib/ruby/gems/1.8/gems/passenger-2.2.10/lib/phusion_passenger/spawn_manager.rb   255     in `spawn_rails_application'  
32  /usr/local/lib/ruby/gems/1.8/gems/passenger-2.2.10/lib/phusion_passenger/spawn_manager.rb   154     in `spawn_application'  
33  /usr/local/lib/ruby/gems/1.8/gems/passenger-2.2.10/lib/phusion_passenger/spawn_manager.rb   287     in `handle_spawn_application'  
34  /usr/local/lib/ruby/gems/1.8/gems/passenger-2.2.10/lib/phusion_passenger/abstract_server.rb     352     in `__send__'  
35  /usr/local/lib/ruby/gems/1.8/gems/passenger-2.2.10/lib/phusion_passenger/abstract_server.rb     352     in `main_loop'  
36  /usr/local/lib/ruby/gems/1.8/gems/passenger-2.2.10/lib/phusion_passenger/abstract_server.rb     196     in `start_synchronously'  
37  /usr/local/lib/ruby/gems/1.8/gems/passenger-2.2.10/bin/passenger-spawn-server   61
    4 回复  |  直到 12 年前
        1
  •  2
  •   CBuente    15 年前

    对我来说,事实证明,我的memcache守护进程没有监听127.0.0.1,而是监听本地主机。从init文件中删除-l localhost选项后,它工作正常。(默认值是在所有设备上侦听。)

        2
  •  1
  •   Rourke    15 年前

    我对memcached gem也有一些类似的问题,然后切换到 dali . 大理的发展似乎更为活跃,速度也明显更快。我按照Github页面上的指示,让Dali在大约10分钟内启动并运行。

        3
  •  0
  •   Jack Chu    15 年前

    只是确定一下,但我看不到您在哪里将会话配置设置为缓存常量: 

    config.action_controller.session = {
  :session_key => '_appname',
  :secret      => 'secret',
  :cache       => CACHE,
  :expires     => 10
}

    这对于QA/dev/testing可能有效,因为我认为默认情况下Rails会在本地主机上查找memcached存储。而在生产环境中,您似乎对memcached服务器拥有不同的IP。

        4
  •  0
  •   Felipe Rojas    15 年前

    在stacktrace中有3行: 

    /var/www/oro/production/releases/20100528130253/config/environment.rb   29 
/usr/local//lib/ruby/site_ruby/1.8/rubygems/custom_require.rb   31  in `gem_original_require'  
/usr/local//lib/ruby/site_ruby/1.8/rubygems/custom_require.rb   31  in `require'

    好像有宝石丢失了,请在第29行查看environment.rb

    你试过了吗?: 

    sudo gem install memcached

    是Memcached在运行吗? 

    sudo /etc/init.d/memcached start
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