connection_pool with_connection strange behaviour - ActiveRecord 2.3.8

I noticed some strange behaviour with connection_pool.with_connection and it’s probably because I am not understanding the proper usage. If I call with_connection, it seems to me that the connection within the block is not used with the ActiveRecord methods. First a simple == comparison.

jruby-1.5.1 > ActiveRecord::Base.connection_pool.with_connection{|c| ActiveRecord::Base.connection==c }

=> false

Then examining the number of active connections after using the with_connection method:

=> {“ActiveRecord::Base”=>#ActiveRecord::ConnectionAdapters::ConnectionPool:0x105b3e5d}

jruby-1.5.1 > ActiveRecord::Base.connection_pool.instance_eval{ @checked_out.length }

**=> 0 **

jruby-1.5.1 > ActiveRecord::Base.connection_pool.with_connection{ |c| EmailAccount.last }

jruby-1.5.1 > ActiveRecord::Base.connection_pool.instance_eval{ @checked_out.length }

=> 1

I found this lighthouse ticket, but it seems to have been resolved. I am using ActiveRecord 2.3.8.