heroku router - - at = info method = GET path =＆＃34; /robots.txt" host = www.blocked.ca request_id = 64d4a40e-88e7-4819-9200-bd3c9fafc6ac fwd =＆＃34; 208.115.111.72/208-115-111-72-reverse.wowrack.com" dyno = web.1 connect = 1ms service = 4ms status = 200 bytes = 333
app web.1 - - [INFO] [已开始GET＆＃34; /uploads/1/2/4/5/12454275/1255727_orig.jpg" for 188.165.15.32/boson020.ahrefs.com at 2015-01-11 12:43:38 +0000]（pid：2）
app web.1 - - [致命] [ActionController :: RoutingError（没有路由匹配[GET]＆＃34; /uploads/1/2/4/5/12454275/1255727_orig.jpg"）：< / p>
app web.1 - - vendor / bundle / ruby / 2.1.0 / gems / actionpack-4.2.0 / lib / action_dispatch / middleware / debug_exceptions.rb:21:in`call'
app web.1 - - vendor / bundle / ruby / 2.1.0 / gems / actionpack-4.2.0 / lib / action_dispatch / middleware / show_exceptions.rb：30：在`call＆＃39;
我在我的一个heroku应用程序上出现此错误而空闲时导致它出现了什么？