无法弄清楚导致500内部服务器错误的原因

Question

我在新推出的Rails 3.1网站上看到来自Apache的看似随机的500内部服务器错误响应。错误如下：

  

[pid = 19441 thr = 2888301424 file = ext / apache2 / Hooks.cpp：822   time = 2011-09-15 15：45：07.311]：后端应用程序（进程   19550）没有发送有效的HTTP响应;相反，它没有发送任何东西   所有。它可能已经崩溃;请检查是否有   正在崩溃这个应用程序中的错误。

有时我也会看到以下错误：

  

[pid = 5805 thr = 75783560 file = utils.rb：176 time = 2011-09-15 16：02：19.471   ]： * 应用程序中的异常PGError（SSL SYSCALL错误：EOF   检测到）（进程5805，线程＃）：           从   /app/oath/vendor/ruby/1.9.1/gems/activerecord-3.1.0/lib/active_record/connection_adapters/postgresql_adapter.rb:276:in   清除缓存中的exec' from /app/oath/vendor/ruby/1.9.1/gems/activerecord-3.1.0/lib/active_record/connection_adapters/postgresql_adapter.rb:276:in 阻止！'           从   /app/oath/vendor/ruby/1.9.1/gems/activerecord-3.1.0/lib/active_record/connection_adapters/postgresql_adapter.rb:275:in   each_value' from /app/oath/vendor/ruby/1.9.1/gems/activerecord-3.1.0/lib/active_record/connection_adapters/postgresql_adapter.rb:275:in clear_cache！”           从   /app/oath/vendor/ruby/1.9.1/gems/activerecord-3.1.0/lib/active_record/connection_adapters/postgresql_adapter.rb:303:in   disconnect!' from /app/oath/vendor/ruby/1.9.1/gems/activerecord-3.1.0/lib/active_record/connection_adapters/abstract/connection_pool.rb:202:in 阻止断开连接！'           从   /app/oath/vendor/ruby/1.9.1/gems/activerecord-3.1.0/lib/active_record/connection_adapters/abstract/connection_pool.rb:201:in   each' from /app/oath/vendor/ruby/1.9.1/gems/activerecord-3.1.0/lib/active_record/connection_adapters/abstract/connection_pool.rb:201:in 断开！”           从   /app/oath/vendor/ruby/1.9.1/gems/activesupport-3.1.0/lib/active_support/core_ext/module/synchronization.rb:35:in   block in disconnect_with_synchronization!' from /usr/local/rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/monitor.rb:201:in mon_synchronize”           从   /app/oath/vendor/ruby/1.9.1/gems/activesupport-3.1.0/lib/active_support/core_ext/module/synchronization.rb:34:in   clear_all_connections中的disconnect_with_synchronization!' from /app/oath/vendor/ruby/1.9.1/gems/activerecord-3.1.0/lib/active_record/connection_adapters/abstract/connection_pool.rb:395:in 阻止！'           从   /app/oath/vendor/ruby/1.9.1/gems/activerecord-3.1.0/lib/active_record/connection_adapters/abstract/connection_pool.rb:395:in   each_value' from /app/oath/vendor/ruby/1.9.1/gems/activerecord-3.1.0/lib/active_record/connection_adapters/abstract/connection_pool.rb:395:in clear_all_connections！”           从   /app/oath/vendor/ruby/1.9.1/gems/activerecord-3.1.0/lib/active_record/connection_adapters/abstract/connection_specification.rb:123:in   clear_all_connections!' from /usr/local/rvm/gems/ruby-1.9.2-p290/gems/passenger-3.0.9/lib/phusion_passenger/utils.rb:398:in before_handling_requests'           从   /usr/local/rvm/gems/ruby-1.9.2-p290/gems/passenger-3.0.9/lib/phusion_passenger/rack/application_spawner.rb:204:in   handle_spawn_application中的start_request_handler' from /usr/local/rvm/gems/ruby-1.9.2-p290/gems/passenger-3.0.9/lib/phusion_passenger/rack/application_spawner.rb:170:in 块           从   /usr/local/rvm/gems/ruby-1.9.2-p290/gems/passenger-3.0.9/lib/phusion_passenger/utils.rb:479:in   safe_fork' from /usr/local/rvm/gems/ruby-1.9.2-p290/gems/passenger-3.0.9/lib/phusion_passenger/rack/application_spawner.rb:165:in handle_spawn_application”           从   /usr/local/rvm/gems/ruby-1.9.2-p290/gems/passenger-3.0.9/lib/phusion_passenger/abstract_server.rb:357:in   server_main_loop' from /usr/local/rvm/gems/ruby-1.9.2-p290/gems/passenger-3.0.9/lib/phusion_passenger/abstract_server.rb:206:in start_synchronously”           从   /usr/local/rvm/gems/ruby-1.9.2-p290/gems/passenger-3.0.9/lib/phusion_passenger/abstract_server.rb:180:in   start' from /usr/local/rvm/gems/ruby-1.9.2-p290/gems/passenger-3.0.9/lib/phusion_passenger/rack/application_spawner.rb:128:in 开始”           从   /usr/local/rvm/gems/ruby-1.9.2-p290/gems/passenger-3.0.9/lib/phusion_passenger/spawn_manager.rb:253:in   block (2 levels) in spawn_rack_application' from /usr/local/rvm/gems/ruby-1.9.2-p290/gems/passenger-3.0.9/lib/phusion_passenger/abstract_server_collection.rb:132:in lookup_or_add”           从   /usr/local/rvm/gems/ruby-1.9.2-p290/gems/passenger-3.0.9/lib/phusion_passenger/spawn_manager.rb:246:in   block in spawn_rack_application' from /usr/local/rvm/gems/ruby-1.9.2-p290/gems/passenger-3.0.9/lib/phusion_passenger/abstract_server_collection.rb:82:in 阻止同步'           from：10：in synchronize' from /usr/local/rvm/gems/ruby-1.9.2-p290/gems/passenger-3.0.9/lib/phusion_passenger/abstract_server_collection.rb:79:in synchronize'           从   /usr/local/rvm/gems/ruby-1.9.2-p290/gems/passenger-3.0.9/lib/phusion_passenger/spawn_manager.rb:244:in   spawn_rack_application' from /usr/local/rvm/gems/ruby-1.9.2-p290/gems/passenger-3.0.9/lib/phusion_passenger/spawn_manager.rb:137:in spawn_application”           从   /usr/local/rvm/gems/ruby-1.9.2-p290/gems/passenger-3.0.9/lib/phusion_passenger/spawn_manager.rb:275:in   handle_spawn_application' from /usr/local/rvm/gems/ruby-1.9.2-p290/gems/passenger-3.0.9/lib/phusion_passenger/abstract_server.rb:357:in server_main_loop”           从   /usr/local/rvm/gems/ruby-1.9.2-p290/gems/passenger-3.0.9/lib/phusion_passenger/abstract_server.rb:206:in   start_synchronously' from /usr/local/rvm/gems/ruby-1.9.2-p290/gems/passenger-3.0.9/helper-scripts/passenger-spawn-server:99:in “

该框运行Ubuntu 10.04 LTS和Apache / 2.2.14，包含Rails 3.1，Passenger 3.0.9和Rack 1.3.2。

这是一个相当简单的网站，我已经没有想法了。