500 Internal Server Error

getaddrinfo: hostname nor servname provided, or not known (SocketError)

/usr/local/ruby/1.8/lib/ruby/1.8/net/http.rb:560:in `initialize'
/usr/local/ruby/1.8/lib/ruby/1.8/net/http.rb:560:in `open'
/usr/local/ruby/1.8/lib/ruby/1.8/net/http.rb:560:in `connect'
/usr/local/ruby/1.8/lib/ruby/1.8/timeout.rb:53:in `timeout'
/usr/local/ruby/1.8/lib/ruby/1.8/timeout.rb:101:in `timeout'
/usr/local/ruby/1.8/lib/ruby/1.8/net/http.rb:560:in `connect'
/usr/local/ruby/1.8/lib/ruby/1.8/net/http.rb:553:in `do_start'
/usr/local/ruby/1.8/lib/ruby/1.8/net/http.rb:542:in `start'
/usr/local/ruby/1.8/lib/ruby/1.8/net/http.rb:379:in `get_response'
(plugin/amazon.rb):54:in `amazon_fetch'
(plugin/amazon.rb):83:in `amazon_call_ecs'
/usr/local/ruby/1.8/lib/ruby/1.8/timeout.rb:67:in `timeout'
(plugin/amazon.rb):82:in `amazon_call_ecs'
(plugin/amazon.rb):266:in `amazon_get'
(plugin/amazon.rb):373:in `isbn_detail'
(TDiary::Plugin#eval_src):636:in `eval_src'
/home/harunaru/tdiary/tdiary/plugin.rb:96:in `eval_src'
/home/harunaru/tdiary/tdiary/core_ext.rb:82:in `safe'
/home/harunaru/tdiary/tdiary/core_ext.rb:80:in `call'
/home/harunaru/tdiary/tdiary/core_ext.rb:80:in `safe'
/home/harunaru/tdiary/tdiary/plugin.rb:95:in `eval_src'
/home/harunaru/tdiary/tdiary.rb:214:in `do_eval_rhtml'
/home/harunaru/tdiary/tdiary.rb:162:in `eval_rhtml'
/home/harunaru/tdiary/tdiary.rb:873:in `eval_rhtml'
/home/harunaru/tdiary/tdiary/dispatcher/index_main.rb:43:in `run'
/home/harunaru/tdiary/tdiary/dispatcher/index_main.rb:6:in `run'
/home/harunaru/tdiary/tdiary/dispatcher.rb:21:in `dispatch_cgi'
/home/harunaru/tdiary/index.rb:36
index.rb:2:in `require'
index.rb:2