您好我使用nginx，capistrano，varnish，Phusion Passenger和Rails进行VPS Ubuntu 10.04设置。有一段时间我得到一个奇怪的路由请求，寻找路由：
http://localhost/cgi-bin/php/cgin/php?%2D%64+%61%6C%75%6F%6E+%2D%64+%6D%6F%64+%2D%64+%73%75%68%6F%6E%3D%6F%6E+%2D%64+%75%6E%63%74%73%3D%22%22+%2D%64+%64%6E%65+%2D%64+%61%75%74%6F%5F%70%72%%74+%2D%64+%63%67%69%2E%66%6F%72%63%65%5F%72%65%64%69%72%65%63%74%3D%30+%2D%64+%74%5F%3D%30+%2D%64+%75%74+%2D%6E
这会导致Rails抛出NoMethodError异常。什么可能导致此请求在服务器上发生？
以下是我从服务器获取的堆栈跟踪：
A NoMethodError occurred in errors#routing:
undefined method `merge' for nil:NilClass
rack (1.3.10) lib/rack/request.rb:202:in `params'
-------------------------------
Request:
-------------------------------
* URL : http://localhost/cgi-bin/php/cgin/php?%2D%64+%61%6C%75%6F%6E+%2D%64+%6D%6F%64+%2D%64+%73%75%68%6F%6E%3D%6F%6E+%2D%64+%75%6E%63%74%73%3D%22%22+%2D%64+%64%6E%65+%2D%64+%61%75%74%6F%5F%70%72%%74+%2D%64+%63%67%69%2E%66%6F%72%63%65%5F%72%65%64%69%72%65%63%74%3D%30+%2D%64+%74%5F%3D%30+%2D%64+%75%74+%2D%6E
* IP address: 127.0.0.1
* Parameters: {"controller"=>"errors", "action"=>"routing", "a"=>"cgi-bin/php/cgin/php"}
* Rails root: /home/deploy/application.com/releases/20131117065231
* Timestamp : 2013-12-06 06:19:02 UTC
-------------------------------
Session:
-------------------------------
* session id: nil
* data: {}
-------------------------------
Environment:
-------------------------------
* CONTENT_LENGTH : 1
* CONTENT_TYPE : text/html
* DOCUMENT_ROOT : /home/deploy/application.com/current/public
* HTTPS : off
* HTTP_HOST : localhost
* HTTP_X_FORWARDED_PROTO : http
* HTTP_X_VARNISH : 340799594
* ORIGINAL_FULLPATH : /cgi-bin/php/cgin/php?%2D%64+%61%6C%75%6F%6E+%2D%64+%6D%6F%64+%2D%64+%73%75%68%6F%6E%3D%6F%6E+%2D%64+%75%6E%63%74%73%3D%22%22+%2D%64+%64%6E%65+%2D%64+%61%75%74%6F%5F%70%72%%74+%2D%64+%63%67%69%2E%66%6F%72%63%65%5F%72%65%64%69%72%65%63%74%3D%30+%2D%64+%74%5F%3D%30+%2D%64+%75%74+%2D%6E
* PASSENGER_APP_TYPE : rack
* PASSENGER_CONNECT_PASSWORD : [FILTERED]
* PASSENGER_ENV : production
* PASSENGER_MIN_INSTANCES : 1
* PATH_INFO : /cgi-bin/php/cgin/php
* QUERY_STRING : %2D%64+%61%6C%75%6F%6E+%2D%64+%6D%6F%64+%2D%64+%73%75%68%6F%6E%3D%6F%6E+%2D%64+%75%6E%63%74%73%3D%22%22+%2D%64+%64%6E%65+%2D%64+%61%75%74%6F%5F%70%72%%74+%2D%64+%63%67%69%2E%66%6F%72%63%65%5F%72%65%64%69%72%65%63%74%3D%30+%2D%64+%74%5F%3D%30+%2D%64+%75%74+%2D%6E
* REMOTE_ADDR : 127.0.0.1
* REMOTE_PORT : 34005
* REQUEST_METHOD : POST
* REQUEST_URI : /cgi-bin/php/cgin/php?%2D%64+%61%6C%75%6F%6E+%2D%64+%6D%6F%64+%2D%64+%73%75%68%6F%6E%3D%6F%6E+%2D%64+%75%6E%63%74%73%3D%22%22+%2D%64+%64%6E%65+%2D%64+%61%75%74%6F%5F%70%72%%74+%2D%64+%63%67%69%2E%66%6F%72%63%65%5F%72%65%64%69%72%65%63%74%3D%30+%2D%64+%74%5F%3D%30+%2D%64+%75%74+%2D%6E
* SCGI : 1
* SCRIPT_NAME :
* SERVER_ADDR : 127.0.0.1
* SERVER_NAME : localhost
* SERVER_PORT : 8080
* SERVER_PROTOCOL : HTTP/1.1
* SERVER_SOFTWARE : nginx/1.4.3
* action_controller.instance : errors#routing
* action_dispatch.cookies : #<ActionDispatch::Cookies::CookieJar:0xe348290>
* action_dispatch.parameter_filter : [:password, /RAW_POST_DATA/]
* action_dispatch.remote_ip : 127.0.0.1
* action_dispatch.request.content_type : text/html
* action_dispatch.request.parameters : {"controller"=>"errors", "action"=>"routing", "a"=>"cgi-bin/php/cgin/php"}
* action_dispatch.request.path_parameters : {:controller=>"errors", :action=>"routing", :a=>"cgi-bin/php/cgin/php"}
* action_dispatch.request.query_parameters : {}
* action_dispatch.request.request_parameters : {}
* action_dispatch.request.unsigned_session_cookie: {}
* action_dispatch.routes : #<ActionDispatch::Routing::RouteSet:0xa0b7d40>
* action_dispatch.secret_token : 17975cc9cf1bfec1badfa83becc730a52221e2f5fe23cc8cec56361d311069f25e7daee6e842e1f149a4e29b0014127cc0efb675173ed2c828c8a0846b1eaf4b
* action_dispatch.show_exceptions : true
* exception_notifier.options : {:sender_address=>"\"exception notifier\" <info@application.com>", :exception_recipients=>["admin@application.com"], :email_prefix=>"[Exception] ", :email_format=>:text, :sections=>["request", "session", "environment", "backtrace"], :background_sections=>["backtrace", "data"], :verbose_subject=>true, :normalize_subject=>false, :template_path=>"exception_notifier", :smtp_settings=>nil, :ignore_exceptions=>["ActiveRecord::RecordNotFound", "AbstractController::ActionNotFound", "ActionController::RoutingError"], :ignore_crawlers=>[], :ignore_if=>#<Proc:0xba1781c@/usr/local/lib/ruby/gems/1.9.1/gems/exception_notification-3.0.0/lib/exception_notifier.rb:36 (lambda)>}
* rack-cache.allow_reload : false
* rack-cache.allow_revalidate : false
* rack-cache.cache_key : Rack::Cache::Key
* rack-cache.default_ttl : 0
* rack-cache.entitystore : rails:/
* rack-cache.ignore_headers : ["Set-Cookie"]
* rack-cache.metastore : rails:/
* rack-cache.private_headers : ["Authorization", "Cookie"]
* rack-cache.storage : #<Rack::Cache::Storage:0xac65cb4>
* rack-cache.use_native_ttl : false
* rack-cache.verbose : true
* rack.errors : #<IO:0x9949ce8>
* rack.hijack : #<Proc:0xef66c48@/usr/local/lib/ruby/gems/1.9.1/gems/passenger-4.0.23/lib/phusion_passenger/rack/thread_handler_extension.rb:69 (lambda)>
* rack.hijack? : true
* rack.input : #<PhusionPassenger::Utils::TeeInput:0xef66dec>
* rack.multiprocess : true
* rack.multithread : false
* rack.request.cookie_hash : {}
* rack.request.query_string : %2D%64+%61%6C%75%6F%6E+%2D%64+%6D%6F%64+%2D%64+%73%75%68%6F%6E%3D%6F%6E+%2D%64+%75%6E%63%74%73%3D%22%22+%2D%64+%64%6E%65+%2D%64+%61%75%74%6F%5F%70%72%%74+%2D%64+%63%67%69%2E%66%6F%72%63%65%5F%72%65%64%69%72%65%63%74%3D%30+%2D%64+%74%5F%3D%30+%2D%64+%75%74+%2D%6E
* rack.run_once : false
* rack.session : {}
* rack.session.options : {:key=>"_application_session", :path=>"/", :domain=>:all, :expire_after=>10 years, :secure=>false, :httponly=>true, :defer=>false, :renew=>false, :http_only=>true, :secret=>"f6ecedcf6396859ce6b32656f0678419f72afe61ecc15707085abf80c3d8", :coder=>#<Rack::Session::Cookie::Base64::Marshal:0xbb31090>, :id=>nil}
* rack.url_scheme : http
* rack.version : [1, 2]
* warden : Warden::Proxy:125517500 @config={:default_scope=>:user, :scope_defaults=>{}, :default_strategies=>{:user=>[:rememberable, :database_authenticatable]}, :intercept_401=>false, :failure_app=>#<Devise::Delegator:0xb02dbd0>}
* Process: 9625
* Server : server_name
-------------------------------
Backtrace:
-------------------------------
rack (1.3.10) lib/rack/request.rb:202:in `params'
newrelic_rpm (3.5.5.38) lib/new_relic/rack/error_collector.rb:15:in `rescue in call'
newrelic_rpm (3.5.5.38) lib/new_relic/rack/error_collector.rb:8:in `call'
newrelic_rpm (3.5.5.38) lib/new_relic/rack/browser_monitoring.rb:12:in `call'
exception_notification (3.0.0) lib/exception_notifier.rb:40:in `call'
warden (1.2.1) lib/warden/manager.rb:35:in `block in call'
warden (1.2.1) lib/warden/manager.rb:34:in `catch'
warden (1.2.1) lib/warden/manager.rb:34:in `call'
actionpack (3.1.12) lib/action_dispatch/middleware/best_standards_support.rb:17:in `call'
rack (1.3.10) lib/rack/etag.rb:23:in `call'
rack (1.3.10) lib/rack/conditionalget.rb:35:in `call'
actionpack (3.1.12) lib/action_dispatch/middleware/head.rb:14:in `call'
remotipart (1.0.2) lib/remotipart/middleware.rb:30:in `call'
actionpack (3.1.12) lib/action_dispatch/middleware/params_parser.rb:21:in `call'
actionpack (3.1.12) lib/action_dispatch/middleware/flash.rb:243:in `call'
rack (1.3.10) lib/rack/session/abstract/id.rb:195:in `context'
rack (1.3.10) lib/rack/session/abstract/id.rb:190:in `call'
actionpack (3.1.12) lib/action_dispatch/middleware/cookies.rb:331:in `call'
activerecord (3.1.12) lib/active_record/query_cache.rb:64:in `call'
activerecord (3.1.12) lib/active_record/connection_adapters/abstract/connection_pool.rb:477:in `call'
actionpack (3.1.12) lib/action_dispatch/middleware/callbacks.rb:29:in `block in call'
activesupport (3.1.12) lib/active_support/callbacks.rb:392:in `_run_call_callbacks'
activesupport (3.1.12) lib/active_support/callbacks.rb:81:in `run_callbacks'
actionpack (3.1.12) lib/action_dispatch/middleware/callbacks.rb:28:in `call'
rack (1.3.10) lib/rack/sendfile.rb:101:in `call'
actionpack (3.1.12) lib/action_dispatch/middleware/remote_ip.rb:48:in `call'
actionpack (3.1.12) lib/action_dispatch/middleware/show_exceptions.rb:47:in `call'
railties (3.1.12) lib/rails/rack/logger.rb:13:in `call'
rack (1.3.10) lib/rack/methodoverride.rb:24:in `call'
rack (1.3.10) lib/rack/runtime.rb:17:in `call'
activesupport (3.1.12) lib/active_support/cache/strategy/local_cache.rb:72:in `call'
rack (1.3.10) lib/rack/lock.rb:15:in `call'
rack-cache (1.2) lib/rack/cache/context.rb:136:in `forward'
rack-cache (1.2) lib/rack/cache/context.rb:143:in `pass'
rack-cache (1.2) lib/rack/cache/context.rb:152:in `rescue in invalidate'
rack-cache (1.2) lib/rack/cache/context.rb:149:in `invalidate'
rack-cache (1.2) lib/rack/cache/context.rb:71:in `call!'
rack-cache (1.2) lib/rack/cache/context.rb:51:in `call'
railties (3.1.12) lib/rails/engine.rb:456:in `call'
railties (3.1.12) lib/rails/application.rb:143:in `call'
railties (3.1.12) lib/rails/railtie/configurable.rb:30:in `method_missing'
passenger (4.0.23) lib/phusion_passenger/rack/thread_handler_extension.rb:77:in `process_request'
passenger (4.0.23) lib/phusion_passenger/request_handler/thread_handler.rb:140:in `accept_and_process_next_request'
passenger (4.0.23) lib/phusion_passenger/request_handler/thread_handler.rb:108:in `main_loop'
passenger (4.0.23) lib/phusion_passenger/request_handler.rb:441:in `block (3 levels) in start_threads'