Thin raises missing template exceptions rarely - ruby-on-rails

Question

On my prod server I'm getting Missing template exceptions sometime.
The setup is VPN with CentOS5, ruby 1.9.2, Rails 3.2.1, 8 nginx instances, 6 thin instances
So, this happens with two main views, happens rarely, approx. 1 time per 1000 requests, but it is
As I understand thin recieves the request and just process with real exception, but I cannot realize why, because 999 of 1000 other request are ok and they must be ok.
Is this a filesystem issue? or smth with locale from bots?
exception example is here:
From: Exception Notifier <myhost>
Subject: [myhost Exception] controllername#actionname (ActionView::MissingTemplate) "Missing
template controllername/actionname, application/actionname with {:locale=>[...
Mime-Version: 1.0
Content-Type: text/plain;
charset=UTF-8
Content-Transfer-Encoding: quoted-printable
X-Gm-Message-State: ALoCoQn4St5gK1z...
A ActionView::MissingTemplate occurred in controllername#actionname:
Missing template controllername/actionname, application/actionname with {:locale=3D>[:en], :fo=
rmats=3D>[:html], :handlers=3D>[:erb, :builder, :coffee, :haml]}. Searche=
d in:
* "/..mypath../releases/20120205001108/app/views"
actionpack (3.2.1) lib/action_view/path_set.rb:58:in `find'
-------------------------------
Request:
-------------------------------
* URL : http://myhost/actionurl
* IP address: 74.208.8.48
* Parameters: {"utf8"=3D>"=E2=9C=93", "authenticity_token"=3D>"Ffkm6Bd8=
wi3+Got7uTeLhzj86hJNDpFYRjG4Yrqx4yQ=3D", "video_link"=3D>"", "controller"=
=3D>"controllername", "action"=3D>"actionname"}
* Rails root: /..mypath../releases/20120205001108
-------------------------------
Session:
-------------------------------
* session id: "0c7c55faac70eb0632139de299ccdc9a"
* data: {"session_id"=3D>"0c7c55faac70eb0632139de299ccdc9a",
"_csrf_token"=3D>"Ffkm6Bd8wi3+Got7uTeLhzj86hJNDpFYRjG4Yrqx4yQ=3D"}
-------------------------------
Environment:
-------------------------------
* CONTENT_LENGTH : 94
* CONTENT_TYPE : application/x-www-fo=
rm-urlencoded
* GATEWAY_INTERFACE : CGI/1.2
* HTTP_ACCEPT : image/gif, image/x-x=
bitmap, image/jpeg, image/pjpeg, */*
* HTTP_ACCEPT_ENCODING : gzip, deflate
* HTTP_ACCEPT_LANGUAGE : en-us
* HTTP_CONNECTION : close
* HTTP_COOKIE : _myhost_session=3DBA=
h7B0kiD3Nlc3Npb25faWQGOgZFRkkiJTBjN2M1NWZhYWM3MGViMDYzMjEzOWRlMjk5Y2NkYzl=
hBjsAVEkiEF9jc3JmX3Rva2VuBjsARkkiMUZma202QmQ4d2kzK0dvdDd1VGVMaHpqODZoSk5E=
cEZZUmpHNFlycXg0eVE9BjsARg%3D%3D--7766b6f664ae053b5682f046ad3531e5a41bcdf=
d
* HTTP_HOST : myhost
* HTTP_MAX_FORWARDS : 10
* HTTP_PRAGMA : no-cache
* HTTP_REFERER : http://myhost/
* HTTP_USER_AGENT : Mozilla/4.0 (compati=
ble; MSIE 6.0; Windows NT 5.1)
* HTTP_VERSION : HTTP/1.0
* HTTP_X_FORWARDED_FOR : 74.208.8.48
* HTTP_X_REAL_IP : 74.208.8.48
* ORIGINAL_FULLPATH : /actionurl
* PATH_INFO : /actionurl
* QUERY_STRING : =
* REMOTE_ADDR : 127.0.0.1
* REQUEST_METHOD : POST
* REQUEST_PATH : /actionurl
* REQUEST_URI : /actionurl
* SCRIPT_NAME : =
* SERVER_NAME : myhost
* SERVER_PORT : 80
* SERVER_PROTOCOL : HTTP/1.1
* SERVER_SOFTWARE : thin 1.3.1 codename =
Triple Espresso
* action_controller.instance : controllername#actionname
* action_dispatch.backtrace_cleaner : #<Rails::BacktraceCl=
eaner:0xab76b14>
* action_dispatch.cookies : #<ActionDispatch::Co=
okies::CookieJar:0xcaedac4>
* action_dispatch.logger : #<ActiveSupport::Tag=
gedLogging:0xadb7874>
* action_dispatch.parameter_filter : [:password, /RAW_POS=
T_DATA/, /RAW_POST_DATA/, /RAW_POST_DATA/, /RAW_POST_DATA/, /RAW_POST_DAT=
A/, /RAW_POST_DATA/, /RAW_POST_DATA/, /RAW_POST_DATA/, /RAW_POST_DATA/, /=
RAW_POST_DATA/, /RAW_POST_DATA/, /RAW_POST_DATA/, /RAW_POST_DATA/, /RAW_P=
OST_DATA/, /RAW_POST_DATA/, /RAW_POST_DATA/, /RAW_POST_DATA/]
* action_dispatch.remote_ip : 74.208.8.48
* action_dispatch.request.content_type : application/x-www-fo=
rm-urlencoded
* action_dispatch.request.formats : [text/html]
* action_dispatch.request.parameters : {"utf8"=3D>"=E2=9C=93=
", "authenticity_token"=3D>"Ffkm6Bd8wi3+Got7uTeLhzj86hJNDpFYRjG4Yrqx4yQ=3D=
", "someparam"=3D>"", "controller"=3D>"controllername", "action"=3D>"actionname"}
* action_dispatch.request.path_parameters : {:controller=3D>"controllername", :action=3D>"actionname"}
* action_dispatch.request.query_parameters : {}
* action_dispatch.request.request_parameters : {"utf8"=3D>"=E2=9C=93=
", "authenticity_token"=3D>"Ffkm6Bd8wi3+Got7uTeLhzj86hJNDpFYRjG4Yrqx4yQ=3D=
", "video_link"=3D>""}
* action_dispatch.request.unsigned_session_cookie: {"session_id"=3D>"0c=
7c55faac70eb0632139de299ccdc9a", "_csrf_token"=3D>"Ffkm6Bd8wi3+Got7uTeLhz=
j86hJNDpFYRjG4Yrqx4yQ=3D"}
* action_dispatch.request_id : 3e96f7bca9fc30f3e4eb=
1d91e61a63c0
* action_dispatch.routes : #<ActionDispatch::Ro=
uting::RouteSet:0xb0b029c>
* action_dispatch.secret_token : 20b9fbcf1214f8f88d5e=
549c61892c2558dffbe59db6c9dda63c84554af6d628248f3fd5217eb12e47df41260789a=
e59ad359b67e2309e5832390244777d56a7
* action_dispatch.show_detailed_exceptions : false
* action_dispatch.show_exceptions : true
* async.callback : #<Method: Thin::Unix=
Connection(Thin::Connection)#post_process>
* async.close : #<EventMachine::Defa=
ultDeferrable:0xcacf7a4>
* exception_notifier.options : {:sender_address=3D>=
"\"myhost Exception Notifier\" <exception#email>", :exception_recipients=3D>=
["exception#email"], :email_prefix=3D>"[myhost Exception] ", :sections=3D>["=
request", "session", "environment", "backtrace"], :ignore_exceptions=3D>[=
ActiveRecord::RecordNotFound, AbstractController::ActionNotFound, ActionC=
ontroller::RoutingError]}
* 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.metastore : rails:/
* rack-cache.private_headers : ["Authorization", "C=
ookie"]
* rack-cache.storage : #<Rack::Cache::Stora=
ge:0xc2b79b8>
* rack-cache.use_native_ttl : false
* rack-cache.verbose : true
* rack.errors : #<IO:0x99b5b50>
* rack.input : #<StringIO:0xcaa0bac=
>
* rack.multiprocess : false
* rack.multithread : false
* rack.request.cookie_hash : {"_myhost_session"=3D=
>"BAh7B0kiD3Nlc3Npb25faWQGOgZFRkkiJTBjN2M1NWZhYWM3MGViMDYzMjEzOWRlMjk5Y2N=
kYzlhBjsAVEkiEF9jc3JmX3Rva2VuBjsARkkiMUZma202QmQ4d2kzK0dvdDd1VGVMaHpqODZo=
Sk5EcEZZUmpHNFlycXg0eVE9BjsARg=3D=3D--7766b6f664ae053b5682f046ad3531e5a41=
bcdfd"}
* rack.request.cookie_string : _myhost_session=3DBA=
h7B0kiD3Nlc3Npb25faWQGOgZFRkkiJTBjN2M1NWZhYWM3MGViMDYzMjEzOWRlMjk5Y2NkYzl=
hBjsAVEkiEF9jc3JmX3Rva2VuBjsARkkiMUZma202QmQ4d2kzK0dvdDd1VGVMaHpqODZoSk5E=
cEZZUmpHNFlycXg0eVE9BjsARg%3D%3D--7766b6f664ae053b5682f046ad3531e5a41bcdf=
d
* rack.request.form_hash : {"utf8"=3D>"=E2=9C=93=
", "authenticity_token"=3D>"Ffkm6Bd8wi3+Got7uTeLhzj86hJNDpFYRjG4Yrqx4yQ=3D=
", "someparam"=3D>""}
* rack.request.form_input : #<StringIO:0xcaa0bac=
>
* rack.request.form_vars : utf8=3D%E2%9C%93&aut=
henticity_token=3DFfkm6Bd8wi3%2BGot7uTeLhzj86hJNDpFYRjG4Yrqx4yQ%3D&video_=
link=3D
* rack.request.query_hash : {}
* rack.request.query_string : =
* rack.run_once : false
* rack.session : {"session_id"=3D>"0c=
7c55faac70eb0632139de299ccdc9a", "_csrf_token"=3D>"Ffkm6Bd8wi3+Got7uTeLhz=
j86hJNDpFYRjG4Yrqx4yQ=3D"}
* rack.session.options : {:path=3D>"/", :doma=
in=3D>nil, :expire_after=3D>nil, :secure=3D>false, :httponly=3D>true, :de=
fer=3D>false, :renew=3D>false, :coder=3D>#<Rack::Session::Cookie::Base64:=
:Marshal:0xc26f410>, :id=3D>"0c7c55faac70eb0632139de299ccdc9a"}
* rack.url_scheme : http
* rack.version : [1, 0]
=
* Process: 13504
* Server : myserver
-------------------------------
Backtrace:
-------------------------------
actionpack (3.2.1) lib/action_view/path_set.rb:58:in `find'
actionpack (3.2.1) lib/action_view/lookup_context.rb:109:in `find'
actionpack (3.2.1) lib/action_view/renderer/abstract_renderer.rb:3:in `=
find_template'
actionpack (3.2.1) lib/action_view/renderer/template_renderer.rb:28:in =
`determine_template'
actionpack (3.2.1) lib/action_view/renderer/template_renderer.rb:10:in =
`render'
actionpack (3.2.1) lib/action_view/renderer/renderer.rb:36:in `render_t=
emplate'
actionpack (3.2.1) lib/action_view/renderer/renderer.rb:17:in `render'
actionpack (3.2.1) lib/abstract_controller/rendering.rb:109:in `_render=
_template'
actionpack (3.2.1) lib/action_controller/metal/streaming.rb:225:in `_re=
nder_template'
actionpack (3.2.1) lib/abstract_controller/rendering.rb:103:in `render_=
to_body'
actionpack (3.2.1) lib/action_controller/metal/renderers.rb:28:in `rend=
er_to_body'
actionpack (3.2.1) lib/action_controller/metal/compatibility.rb:50:in `=
render_to_body'
actionpack (3.2.1) lib/abstract_controller/rendering.rb:88:in `render'
actionpack (3.2.1) lib/action_controller/metal/rendering.rb:16:in `rend=
er'
actionpack (3.2.1) lib/action_controller/metal/instrumentation.rb:40:in=
`block (2 levels) in render'
activesupport (3.2.1) lib/active_support/core_ext/benchmark.rb:5:in `bl=
ock in ms'
/usr/lib/ruby/1.9.1/benchmark.rb:309:in `realtime'
activesupport (3.2.1) lib/active_support/core_ext/benchmark.rb:5:in `ms=
'
actionpack (3.2.1) lib/action_controller/metal/instrumentation.rb:40:in=
`block in render'
actionpack (3.2.1) lib/action_controller/metal/instrumentation.rb:83:in=
`cleanup_view_runtime'
activerecord (3.2.1) lib/active_record/railties/controller_runtime.rb:2=
4:in `cleanup_view_runtime'
actionpack (3.2.1) lib/action_controller/metal/instrumentation.rb:39:in=
`render'
actionpack (3.2.1) lib/action_controller/metal/implicit_render.rb:10:in=
`default_render'
actionpack (3.2.1) lib/action_controller/metal/implicit_render.rb:5:in =
`send_action'
actionpack (3.2.1) lib/abstract_controller/base.rb:167:in `process_acti=
on'
actionpack (3.2.1) lib/action_controller/metal/rendering.rb:10:in `proc=
ess_action'
actionpack (3.2.1) lib/abstract_controller/callbacks.rb:18:in `block in=
process_action'
activesupport (3.2.1) lib/active_support/callbacks.rb:414:in `_run__858=
933213__process_action__417312363__callbacks'
activesupport (3.2.1) lib/active_support/callbacks.rb:405:in `__run_cal=
lback'
activesupport (3.2.1) lib/active_support/callbacks.rb:385:in `_run_proc=
ess_action_callbacks'
activesupport (3.2.1) lib/active_support/callbacks.rb:81:in `run_callba=
cks'
actionpack (3.2.1) lib/abstract_controller/callbacks.rb:17:in `process_=
action'
actionpack (3.2.1) lib/action_controller/metal/rescue.rb:29:in `process=
_action'
actionpack (3.2.1) lib/action_controller/metal/instrumentation.rb:30:in=
`block in process_action'
activesupport (3.2.1) lib/active_support/notifications.rb:123:in `block=
in instrument'
activesupport (3.2.1) lib/active_support/notifications/instrumenter.rb:=
20:in `instrument'
activesupport (3.2.1) lib/active_support/notifications.rb:123:in `instr=
ument'
actionpack (3.2.1) lib/action_controller/metal/instrumentation.rb:29:in=
`process_action'
actionpack (3.2.1) lib/action_controller/metal/params_wrapper.rb:205:in=
`process_action'
activerecord (3.2.1) lib/active_record/railties/controller_runtime.rb:1=
8:in `process_action'
newrelic_rpm (3.3.1) lib/new_relic/agent/instrumentation/rails3/action_=
controller.rb:34:in `block in process_action'
newrelic_rpm (3.3.1) lib/new_relic/agent/instrumentation/controller_ins=
trumentation.rb:255:in `block in perform_action_with_newrelic_trace'
newrelic_rpm (3.3.1) lib/new_relic/agent/method_tracer.rb:242:in `trace=
_execution_scoped'
newrelic_rpm (3.3.1) lib/new_relic/agent/instrumentation/controller_ins=
trumentation.rb:250:in `perform_action_with_newrelic_trace'
newrelic_rpm (3.3.1) lib/new_relic/agent/instrumentation/rails3/action_=
controller.rb:33:in `process_action'
actionpack (3.2.1) lib/abstract_controller/base.rb:121:in `process'
actionpack (3.2.1) lib/abstract_controller/rendering.rb:45:in `process'=
actionpack (3.2.1) lib/action_controller/metal.rb:203:in `dispatch'
actionpack (3.2.1) lib/action_controller/metal/rack_delegation.rb:14:in=
`dispatch'
actionpack (3.2.1) lib/action_controller/metal.rb:246:in `block in acti=
on'
actionpack (3.2.1) lib/action_dispatch/routing/route_set.rb:66:in `call=
'
actionpack (3.2.1) lib/action_dispatch/routing/route_set.rb:66:in `disp=
atch'
actionpack (3.2.1) lib/action_dispatch/routing/route_set.rb:30:in `call=
'
journey (1.0.1) lib/journey/router.rb:68:in `block in call'
journey (1.0.1) lib/journey/router.rb:56:in `each'
journey (1.0.1) lib/journey/router.rb:56:in `call'
actionpack (3.2.1) lib/action_dispatch/routing/route_set.rb:589:in `cal=
l'
newrelic_rpm (3.3.1) lib/new_relic/rack/browser_monitoring.rb:23:in `ca=
ll'
exception_notification (2.5.2) lib/exception_notifier.rb:25:in `call'
actionpack (3.2.1) lib/action_dispatch/middleware/best_standards_suppor=
t.rb:17:in `call'
rack (1.4.1) lib/rack/etag.rb:23:in `call'
rack (1.4.1) lib/rack/conditionalget.rb:35:in `call'
actionpack (3.2.1) lib/action_dispatch/middleware/head.rb:14:in `call'
actionpack (3.2.1) lib/action_dispatch/middleware/params_parser.rb:21:i=
n `call'
actionpack (3.2.1) lib/action_dispatch/middleware/flash.rb:242:in `call=
'
rack (1.4.1) lib/rack/session/abstract/id.rb:205:in `context'
rack (1.4.1) lib/rack/session/abstract/id.rb:200:in `call'
actionpack (3.2.1) lib/action_dispatch/middleware/cookies.rb:338:in `ca=
ll'
activerecord (3.2.1) lib/active_record/query_cache.rb:64:in `call'
activerecord (3.2.1) lib/active_record/connection_adapters/abstract/con=
nection_pool.rb:443:in `call'
actionpack (3.2.1) lib/action_dispatch/middleware/callbacks.rb:28:in `b=
lock in call'
activesupport (3.2.1) lib/active_support/callbacks.rb:405:in `_run__332=
759817__call__1023748432__callbacks'
activesupport (3.2.1) lib/active_support/callbacks.rb:405:in `__run_cal=
lback'
activesupport (3.2.1) lib/active_support/callbacks.rb:385:in `_run_call=
_callbacks'
activesupport (3.2.1) lib/active_support/callbacks.rb:81:in `run_callba=
cks'
actionpack (3.2.1) lib/action_dispatch/middleware/callbacks.rb:27:in `c=
all'
rack (1.4.1) lib/rack/sendfile.rb:102:in `call'
actionpack (3.2.1) lib/action_dispatch/middleware/remote_ip.rb:31:in `c=
all'
actionpack (3.2.1) lib/action_dispatch/middleware/debug_exceptions.rb:1=
6:in `call'
actionpack (3.2.1) lib/action_dispatch/middleware/show_exceptions.rb:56=
:in `call'
railties (3.2.1) lib/rails/rack/logger.rb:26:in `call_app'
railties (3.2.1) lib/rails/rack/logger.rb:16:in `call'
actionpack (3.2.1) lib/action_dispatch/middleware/request_id.rb:22:in `=
call'
rack (1.4.1) lib/rack/methodoverride.rb:21:in `call'
rack (1.4.1) lib/rack/runtime.rb:17:in `call'
activesupport (3.2.1) lib/active_support/cache/strategy/local_cache.rb:=
72:in `call'
rack (1.4.1) lib/rack/lock.rb:15:in `call'
rack-cache (1.1) lib/rack/cache/context.rb:132:in `forward'
rack-cache (1.1) lib/rack/cache/context.rb:139:in `pass'
rack-cache (1.1) lib/rack/cache/context.rb:151:in `invalidate'
rack-cache (1.1) lib/rack/cache/context.rb:70:in `call!'
rack-cache (1.1) lib/rack/cache/context.rb:50:in `call'
railties (3.2.1) lib/rails/engine.rb:479:in `call'
railties (3.2.1) lib/rails/application.rb:220:in `call'
railties (3.2.1) lib/rails/railtie/configurable.rb:30:in `method_missin=
g'
thin (1.3.1) lib/thin/connection.rb:80:in `block in pre_process'
thin (1.3.1) lib/thin/connection.rb:78:in `catch'
thin (1.3.1) lib/thin/connection.rb:78:in `pre_process'
thin (1.3.1) lib/thin/connection.rb:53:in `process'
thin (1.3.1) lib/thin/connection.rb:38:in `receive_data'
eventmachine (0.12.10) lib/eventmachine.rb:256:in `run_machine'
eventmachine (0.12.10) lib/eventmachine.rb:256:in `run'
thin (1.3.1) lib/thin/backends/base.rb:61:in `start'
thin (1.3.1) lib/thin/server.rb:159:in `start'
thin (1.3.1) lib/thin/controllers/controller.rb:86:in `start'
thin (1.3.1) lib/thin/runner.rb:185:in `run_command'
thin (1.3.1) lib/thin/runner.rb:151:in `run!'
thin (1.3.1) bin/thin:6:in `<top (required)>'
/..mypath../shared/bundle/ruby/1.9.1/bin/thin:19:in `load'
/..mypath../shared/bundle/ruby/1.9.1/bin/thin:19:in `<main>'

Answer 1

Is this supposed to be a POST request? That's what's showing up in the stacktrace:
REQUEST_METHOD : POST