Rails, Passenger und Memcached: Server konnte während der Initialisierung nicht gefunden werden

Question

Ich hoffe, jemand kann mir bei einem Problem helfen, von dem ich sicher bin, dass es sich um einen Benutzerfehler handelt.

Die Konfigurationsdetails unten funktionieren in allen meinen anderen Umgebungen einschließlich Integration, Entwicklung und qa. Allerdings geben die Produktionsserver den folgenden Fehler:

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

Wenn ich Telnet auf die Memcached-Box von dem Server das Problem und führen Statistik 'mit, die ich erhalten:

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 

Im Folgenden sind die Konfiguration Details und Stacktrace.

config/environment.rb (die wichtigen Teile):

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

config/Umgebungen/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 

Answer 1

nur sicherstellen, aber ich sehe nicht, wo Sie die Sitzungskonfiguration auf Ihre CACHE-Konstante einstellen:

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

Dies könnte für qa/dev/testing funktionieren, da ich glaube, dass rails nach dem Memcached-Speicher auf localhost sucht. Während der Produktion scheinen Sie eine andere IP für den Memcached-Server zu haben.

Answer 2

Im Stacktrace gibt es drei Linien:

/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' 

Es scheint einige Juwel zu fehlen, bitte die environment.rb on line 29

bewertet haben Sie versucht ?:

sudo gem install memcached 

Es läuft memcached?

sudo /etc/init.d/memcached start 

Answer 3

Ich hatte einige ähnliche Probleme mit dem Memcached Juwel und wechselte zu dali. Die Entwicklung von dali scheint aktiver und deutlich schneller. Ich folgte den Anweisungen auf der GitHub-Seite und war in etwa zehn Minuten fertig.

Answer 4

Für mich stellte sich heraus, dass mein Memcache-Daemon nicht auf 127.0.0.1, sondern auf localhost zu hören war. Nach dem Entfernen der Option -l localhost aus der init-Datei hat es perfekt funktioniert. (Standard ist, auf allen Geräten zu hören.)