[Rails 3] Failed to get session options

Hi everybody,

I’m trying to switch the session store in Rails 3 by changing the
config/application.rb as following:

config/application.rb
#-----------------------------------
memcache_options = {
:compression => true,
:debug => false,
:namespace => “xx-cache”,
:readonly => false,
:urlencode => false
}
CACHE = MemCache.new(memcache_options)
CACHE.servers = [‘127.0.0.1:17898’]
#check if CACHE is connected
#puts CACHE
config.action_dispatch.session = {
:session_key => ‘_xx_session’,
:secret => ‘xx’,
:cache => CACHE,
:expires => 900
}
config.action_dispatch.session_store = :mem_cache_store
#-----------------------------------

Memcache server is running. However, when run “rails s”, i got this
message:

=> Booting WEBrick
=> Rails 3.0.0.beta3 application starting in development on
http://0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server
Exiting
/usr/lib/ruby/gems/1.9.1/gems/actionpack-3.0.0.beta3/lib/
action_dispatch/middleware/session/mem_cache_store.rb:19:in
`initialize’: #ActionDispatch::Session::MemCacheStore:0xa302950
unable to find server during initialization. (RuntimeError)

It seems the session options was not passed correctly. But i’m not
sure what’s wrong here cause I’m new to Rails.

Any help will be appreciated.
Thanks

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