Is this error related to connection pool

Hi
   My environment is
   ruby 1.8.6
   rails 2.2.2
   mysql 5.1
   windowsXP

  I have a very lengthy controller action which fetch mail from pop
server.
But some times I get error. Mainly three error. And I have to restart
the application again to remove this errors. But after some time the
same errors again happens

1) Mysql::Error (Can't connect to MySQL server on 'localhost' (10048)):
    C:/Ruby186/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/connection_adapters/mysql_adapter.rb:548:in
`real_connect'
    C:/Ruby186/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/connection_adapters/mysql_adapter.rb:548:in
`connect'
    C:/Ruby186/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/connection_adapters/mysql_adapter.rb:198:in
`initialize'
      ----------------------etc

2) Mysql::Error (Can't connect to MySQL server on 'localhost' (10055)):
   ----------------etc
    C:/Ruby186/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/connection_adapters/mysql_adapter.rb:74:in
`mysql_connection'
    C:/Ruby186/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:223:in
`send'

3) Errno::ENOTCONN (A request to send or receive data was disallowed
because the socket is not connected and (when sending on a datagram
socket using a sendto call) no address was supplied.):
   /lib/pop_ssl.rb:535:in `connect'
   /lib/pop_ssl.rb:535:in `do_start'
   /lib/pop_ssl.rb:507:in `start'
   /lib/pop_ssl.rb:382:in `start'

Please help to solve this issue