因此，经过几天的故障排除以让Passenger 加载我的rails 应用程序后，当我导航到我的域时，我遇到了一些关于gemset 错误和数据库角色无法登录的小乘客错误。我相信我已经修复了这些设置错误，但是现在当我导航到我的域时，我什么也得不到。没有错误页面，什么都没有。我在错误日志中找不到任何指示我的问题所在的内容。我怀疑问题可能与权限有关，但我不知道如何诊断这是否正确或如何解决。这是我的错误日志的样子：
[Fri Nov 01 10:10:14 2013] [notice] caught SIGTERM, shutting down
[Fri Nov 01 10:10:15 2013] [notice] SELinux policy enabled; httpd running as context unconfined_u:system_r:httpd_t:s0
[Fri Nov 01 10:10:15 2013] [notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
[ 2013-11-01 10:10:15.0461 3060/7f2d05770720 agents/Watchdog/Main.cpp:574 ]: Options: { 'analytics_log_user' => 'nobody', 'default_group' => 'nobody', 'default_python' => 'python', 'default_ruby' => '/home/krstck/.rvm/wrappers/ruby-1.9.3-p448/ruby', 'default_user' => 'nobody', 'log_level' => '0', 'max_instances_per_app' => '0', 'max_pool_size' => '6', 'passenger_root' => '/home/krstck/.rvm/gems/ruby-1.9.3-p448/gems/passenger-4.0.23', 'pool_idle_time' => '300', 'temp_dir' => '/tmp', 'union_station_gateway_address' => 'gateway.unionstationapp.com', 'union_station_gateway_port' => '443', 'user_switching' => 'true', 'web_server_pid' => '3059', 'web_server_type' => 'apache', 'web_server_worker_gid' => '48', 'web_server_worker_uid' => '48' }
[ 2013-11-01 10:10:15.1385 3063/7f0d05adc720 agents/HelperAgent/Main.cpp:619 ]: PassengerHelperAgent online, listening at unix:/tmp/passenger.1.0.3059/generation-0/request
[ 2013-11-01 10:10:15.1523 3068/7f5fe481f7e0 agents/LoggingAgent/Main.cpp:318 ]: PassengerLoggingAgent online, listening at unix:/tmp/passenger.1.0.3059/generation-0/logging
[ 2013-11-01 10:10:15.1528 3060/7f2d05770720 agents/Watchdog/Main.cpp:761 ]: All Phusion Passenger agents started!
[Fri Nov 01 10:10:15 2013] [notice] Digest: generating secret for digest authentication ...
[Fri Nov 01 10:10:15 2013] [notice] Digest: done
[ 2013-11-01 10:10:15.3630 3082/7fad84082720 agents/Watchdog/Main.cpp:574 ]: Options: { 'analytics_log_user' => 'nobody', 'default_group' => 'nobody', 'default_python' => 'python', 'default_ruby' => '/home/krstck/.rvm/wrappers/ruby-1.9.3-p448/ruby', 'default_user' => 'nobody', 'log_level' => '0', 'max_instances_per_app' => '0', 'max_pool_size' => '6', 'passenger_root' => '/home/krstck/.rvm/gems/ruby-1.9.3-p448/gems/passenger-4.0.23', 'pool_idle_time' => '300', 'temp_dir' => '/tmp', 'union_station_gateway_address' => 'gateway.unionstationapp.com', 'union_station_gateway_port' => '443', 'user_switching' => 'true', 'web_server_pid' => '3080', 'web_server_type' => 'apache', 'web_server_worker_gid' => '48', 'web_server_worker_uid' => '48' }
[ 2013-11-01 10:10:15.4069 3085/7fa13a7d6720 agents/HelperAgent/Main.cpp:619 ]: PassengerHelperAgent online, listening at unix:/tmp/passenger.1.0.3080/generation-0/request
[ 2013-11-01 10:10:15.4172 3090/7f6893bad7e0 agents/LoggingAgent/Main.cpp:318 ]: PassengerLoggingAgent online, listening at unix:/tmp/passenger.1.0.3080/generation-0/logging
[ 2013-11-01 10:10:15.4177 3082/7fad84082720 agents/Watchdog/Main.cpp:761 ]: All Phusion Passenger agents started!
[Fri Nov 01 10:10:15 2013] [notice] Apache/2.2.15 (Unix) DAV/2 PHP/5.3.3 Phusion_Passenger/4.0.23 configured -- resuming normal operations
这是乘客记忆统计的输出：
--------- Apache processes ---------
PID PPID VMSize Private Name
------------------------------------
3080 1 471.2 MB 0.2 MB /usr/sbin/httpd
3100 3080 471.2 MB 0.1 MB /usr/sbin/httpd
3101 3080 471.2 MB 0.1 MB /usr/sbin/httpd
3102 3080 471.2 MB 0.1 MB /usr/sbin/httpd
3103 3080 471.2 MB 0.1 MB /usr/sbin/httpd
3104 3080 471.2 MB 0.1 MB /usr/sbin/httpd
3105 3080 471.2 MB 0.1 MB /usr/sbin/httpd
3106 3080 471.2 MB 0.1 MB /usr/sbin/httpd
3107 3080 471.2 MB 0.1 MB /usr/sbin/httpd
### Processes: 9
### Total private dirty RSS: 1.36 MB
-------- Nginx processes --------
### Processes: 0
### Total private dirty RSS: 0.00 MB
---- Passenger processes -----
PID VMSize Private Name
------------------------------
3082 209.8 MB 0.2 MB PassengerWatchdog
3085 497.1 MB 0.3 MB PassengerHelperAgent
3090 207.7 MB 0.5 MB PassengerLoggingAgent
### Processes: 3
### Total private dirty RSS: 1.08 MB
这是乘客状态：
Version : 4.0.21
Date : 2013-11-01 10:35:58 -0500
Instance: 3080
----------- General information -----------
Max pool size : 6
Processes : 0
Requests in top-level queue : 0
----------- Application groups -----------
还有什么我需要包括的吗？加载我的应用程序可能会遇到什么问题？