Using memcache 1.5.0

We have a pretty busy site and use memcache for both sessions and fragment caching. We get about 10-15 of these exceptions
a day.

unexpected response "STORED\r\n"
 [RAILS_ROOT]/vendor/gems/memcache-client-1.5.0/lib/memcache.rb:562:in `cache_get'

The relevant code in cache_get is

    unless keyline =~ /(\d+)\r/ then
      server.close
      raise MemCacheError, "unexpected response #{keyline.inspect}"
    end


What is very strange is that according to the memcache API, the server will only send back "STORED" from a
*set* call, never a *get*, which is where this is happening. The only think I can think of is that somehow 2 or more
communication streams are getting crossed?

Any ideas?

Date: 2009-02-18 01:58
Sender: Mike Perham

I'd guess you are using Rails in threadsafe mode.  You need to
make sure you pass the :multithread => true option in your
configuration:

config.cache_store = [:mem_cache_store, 'localhost:11211', {
:multithread => true }]