Rack session key too long for memcached

Question

I am running Rails 3 configured to use memcached for session store. I have the following setup:

development.rb

config.cache_store = :mem_cache_store

session_store.rb

Foo::Application.config.session_store :mem_cache_store, :key => '_foo_session'

I can start the app fine, when I go to any page I get the following error:

ArgumentError (key too long "rack:session:__really_long_session_key__"):

I realize the limit on memcached key is 255. How can I get around this, or am I doing something wrong?

Answer 1

If your "key" is more than 255 characters, it sounds like you are doing something wrong. Why is your session key that long? What's wrong with MD5 or SHA1?