Rails - Sep 2006 - inexplicable 'Application error (Rails)' in production

I''m hoping someone can point out something obvious I''m not
seeing.
Heres the problem:

When in production mode, when an error occurrs I get the white screen error:

Application error (Rails),

And, I can''t seem to override the method rescue_action_in_public, even
though I''m *certain* local_request? is returning false. If I try to
just render some text to the screen, inside that method in my
application controller class, I still get the ''Application error
(Rails)'' error. So, I can''t implement any exception handling
in
public. Now, I can set

config.action_controller.consider_all_requests_local = true

and I can see the error. So, somehow the request is NOT being seen as
local, yet any attempts to catch it aren''t working. Help. :)

Thanks!

Rich

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If you are getting this error, it¹s a 500 server error. Your dispatcher is
never even seeing it. Look at the error-page specification to see what page
is displayed in the case of a 500 ‹ I¹ll bet it¹s the page you are now
seeing.

Steve


On 9/6/06 5:41 PM, "Rich Brant"
<rbrant-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> 
> I''m hoping someone can point out something obvious I''m
not seeing.
> Heres the problem:
> 
> When in production mode, when an error occurrs I get the white screen
error:
> 
> Application error (Rails),
> 
> And, I can''t seem to override the method rescue_action_in_public,
even
> though I''m *certain* local_request? is returning false. If I try
to
> just render some text to the screen, inside that method in my
> application controller class, I still get the ''Application error
> (Rails)'' error. So, I can''t implement any exception
handling in
> public. Now, I can set
> 
> config.action_controller.consider_all_requests_local = true
> 
> and I can see the error. So, somehow the request is NOT being seen as
> local, yet any attempts to catch it aren''t working. Help. :)
> 
> Thanks!
> 
> Rich
> 
> > 



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Totally baffled/frustrated by this still.  Any and all ideas are
welcomed :) Even if they are obvious.

I cannot understand why I can''t overwrite these methods.  I
can''t even
overwrite rescue_action, which would allow me to handle all exceptions
regardless of being local or not. What''s odder still is that I have
another rails app on the same box, running fine, without this issue.


System details:

I''m on a VPS running
Fedora Core 4
Ruby 1.8.4
Rails 1.1.6
SCGI




On 9/6/06, Rich Brant
<rbrant-To7aG29cuAKKf2Id4j40wVaTQe2KTcn/@public.gmane.org>
wrote:
> No, it''s a rails error. It''s any rails error in
production. I can
> toggle on and of  config.action_controller.consider_all_requests_local
> = false and true and when set to true I can see the error and they are
> rails errors. But for some reason, if i set
> consider_all_requests_local = false and I know local_request? returns
> false, resuce_action_in_public can''t seem to be overridden. Or am
I
> not seeing what you are suggesting?
>
> On 9/6/06, s.ross <cwdinfo-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> >
> >  If you are getting this error, it''s a 500 server error. Your
dispatcher is
> > never even seeing it. Look at the error-page specification to see what
page
> > is displayed in the case of a 500 — I''ll bet it''s
the page you are now
> > seeing.
> >
> >  Steve
> >
> >
> >
> >  On 9/6/06 5:41 PM, "Rich Brant"
<rbrant-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> >
> >
> >
> >
> >  I''m hoping someone can point out something obvious
I''m not seeing.
> >  Heres the problem:
> >
> >  When in production mode, when an error occurrs I get the white screen
> > error:
> >
> >  Application error (Rails),
> >
> >  And, I can''t seem to override the method
rescue_action_in_public, even
> >  though I''m *certain* local_request? is returning false. If I
try to
> >  just render some text to the screen, inside that method in my
> >  application controller class, I still get the ''Application
error
> >  (Rails)'' error. So, I can''t implement any exception
handling in
> >  public. Now, I can set
> >
> >  config.action_controller.consider_all_requests_local > > true
> >
> >  and I can see the error. So, somehow the request is NOT being seen as
> >  local, yet any attempts to catch it aren''t working. Help. :)
> >
> >  Thanks!
> >
> >  Rich
> >
> >
> >
> >
> >  > >
> >
>
>
> --
> Rich Brant
> http://brantinteractive.com
> rbrant-To7aG29cuAKKf2Id4j40wVaTQe2KTcn/@public.gmane.org
> v. 267.640.2195  f. 215.689.1454
>

-- 
Rich Brant
http://brantinteractive.com
rbrant-To7aG29cuAKKf2Id4j40wVaTQe2KTcn/@public.gmane.org
v. 267.640.2195  f. 215.689.1454

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On 9/7/06, Rich Brant <rbrant-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
>
>
> Totally baffled/frustrated by this still.  Any and all ideas are
> welcomed :) Even if they are obvious.
>
> I cannot understand why I can''t overwrite these methods.  I
can''t even
> overwrite rescue_action, which would allow me to handle all exceptions
> regardless of being local or not. What''s odder still is that I
have
> another rails app on the same box, running fine, without this issue.

Hi Rich

Another rails app on the same box ....? Is it a different instance of the
same app? If not then there is no comparison, if yes, then are they sharing
the same session store?

I would recommend looking into

A. session store. This can happen due to stale
session data, if you are running memcache restart it, if you use
PStore then delete all session files and restart your application, if
you use DataStore
for session then delete all rows from session table.

B. run the application in debug mode, set logger level to
debug, your logs should tell you what is causing this 500 internal error.

hope this helps

-daya

System details:
>
> I''m on a VPS running
> Fedora Core 4
> Ruby 1.8.4
> Rails 1.1.6
> SCGI
>
>
>
>
> On 9/6/06, Rich Brant
<rbrant-To7aG29cuAKKf2Id4j40wVaTQe2KTcn/@public.gmane.org> wrote:
> > No, it''s a rails error. It''s any rails error in
production. I can
> > toggle on and of  config.action_controller.consider_all_requests_local
> > = false and true and when set to true I can see the error and they are
> > rails errors. But for some reason, if i set
> > consider_all_requests_local = false and I know local_request? returns
> > false, resuce_action_in_public can''t seem to be overridden.
Or am I
> > not seeing what you are suggesting?
> >
> > On 9/6/06, s.ross
<cwdinfo-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> > >
> > >  If you are getting this error, it''s a 500 server error.
Your
> dispatcher is
> > > never even seeing it. Look at the error-page specification to see
what
> page
> > > is displayed in the case of a 500 — I''ll bet
it''s the page you are now
> > > seeing.
> > >
> > >  Steve
> > >
> > >
> > >
> > >  On 9/6/06 5:41 PM, "Rich Brant"
<rbrant-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> > >
> > >
> > >
> > >
> > >  I''m hoping someone can point out something obvious
I''m not seeing.
> > >  Heres the problem:
> > >
> > >  When in production mode, when an error occurrs I get the white
screen
> > > error:
> > >
> > >  Application error (Rails),
> > >
> > >  And, I can''t seem to override the method
rescue_action_in_public,
> even
> > >  though I''m *certain* local_request? is returning false.
If I try to
> > >  just render some text to the screen, inside that method in my
> > >  application controller class, I still get the
''Application error
> > >  (Rails)'' error. So, I can''t implement any
exception handling in
> > >  public. Now, I can set
> > >
> > >  config.action_controller.consider_all_requests_local > >
> true
> > >
> > >  and I can see the error. So, somehow the request is NOT being
seen as
> > >  local, yet any attempts to catch it aren''t working.
Help. :)
> > >
> > >  Thanks!
> > >
> > >  Rich
> > >
> > >
> > >
> > >
> > >  > >
> > >
> >
> >
> > --
> > Rich Brant
> > http://brantinteractive.com
> > rbrant-To7aG29cuAKKf2Id4j40wVaTQe2KTcn/@public.gmane.org
> > v. 267.640.2195  f. 215.689.1454
> >
>
>
> --
> Rich Brant
> http://brantinteractive.com
> rbrant-To7aG29cuAKKf2Id4j40wVaTQe2KTcn/@public.gmane.org
> v. 267.640.2195  f. 215.689.1454
>
> >
>

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> Another rails app on the same box ....? Is it a different
> instance of the same app? If not then there is no comparison, if yes, then
> are they sharing the same session store?
no, different instances
>
> I would recommend looking into
>
> A. session store. This can happen due to stale session
> data, if you are running memcache restart
> it, if you use PStore then delete all
> session files and restart your application, if you
> use DataStore
>  for session then delete all rows from session table.
>

just PStore, and I tried that
> B. run the application in debug mode, set logger level to debug, your logs
> should tell you what is causing this 500
> internal error.
That''s the thing.  I *know* what the errors are. I just can''t
catch
(handle) them in production. So while I know what the errors are, that
still doesn''t help me catch them.. becasue I can''t seem to
overwrite
rescue_action or rescue_action_in_public. ActionController catches
them just fine, but my app can''t :(

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minor update.. neither app can overwrite the recue_action_in_public
method. Although I am sure the first one could at one point. hmm. what
could have changed to casue this???



On 9/7/06, Rich Brant <rbrant-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> > Another rails app on the same box ....? Is it a different
> > instance of the same app? If not then there is no comparison, if yes,
then
> > are they sharing the same session store?
>
> no, different instances
>
> >
> > I would recommend looking into
> >
> > A. session store. This can happen due to stale session
> > data, if you are running memcache restart
> > it, if you use PStore then delete all
> > session files and restart your application, if you
> > use DataStore
> >  for session then delete all rows from session table.
> >
>
>
> just PStore, and I tried that
>
> > B. run the application in debug mode, set logger level to debug, your
logs
> > should tell you what is causing this 500
> > internal error.
>
> That''s the thing.  I *know* what the errors are. I just
can''t catch
> (handle) them in production. So while I know what the errors are, that
> still doesn''t help me catch them.. becasue I can''t seem
to overwrite
> rescue_action or rescue_action_in_public. ActionController catches
> them just fine, but my app can''t :(
>

-- 
Rich Brant
http://brantinteractive.com
rbrant-To7aG29cuAKKf2Id4j40wVaTQe2KTcn/@public.gmane.org
v. 267.640.2195  f. 215.689.1454

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hi rich
i have had a similar problem and it tourned out to be a dispatch problem
i don''t know if you have other rails app that works.
for me, i reinstalled fcgi again and it worked.
-- 
Heri R.
http://sprinj.com


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Rich,

Sounds to me like your dispatch isn''t even running.  I''d go
back to the
basics and make sure your line endings, ownership, permissions, and
shebang line are all correct.

Good luck and let us know when you figure it out!
Tim


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Rich Brant wrote:
> When in production mode, when an error occurrs I get the white screen
error:
>
> Application error (Rails),
>
> And, I can't seem to override the method rescue_action_in_public, even
> though I'm *certain* local_request? is returning false.
What is the error, and where are you redefining
rescue_action_in_public?

Some Rails errors sort of occur before your controller ever enters the
picture (don't ask me for details!). If you're redefining
rescue_action_in_public in your controller (or even in your
ApplicationController, I think), errors like that will trigger the
built-in rescue_action_in_public since Rails hasn't reached your
controller yet.

Maybe this is what's happening in your app? It's hard to tell without
knowing what the exception is, where it's occurring
and
where you're redefining the method.

In my apps I redefine rescue_action_in_public in a little 'support'
file in /lib that I include in environment.rb. It seems to catch pretty
much everything.

/config/environment.rb:

require 'myapp_support'

/lib/myapp_support.rb:

module ActionController
  module Rescue
    protected
    def rescue_action_in_public(exception)
      case exception
        when RoutingError, UnknownAction then
          render_text(IO.read(File.join(RAILS_ROOT, 'public',
'404.html')), "404 Not Found")
        else
          render_text(IO.read(File.join(RAILS_ROOT, 'public',
'500.html')), "500 Internal Error")
      end
    end
  end
end

(I'm pretty sure I just copy-pasted this from somewhere in the past,
but I can't remember from where that might have been.)

Chris

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It turned out to be a plugin I was using, ''meantime_filter'' I
havent''
looked into the code enough to know exaclty why yet, but i plan
to..thanks for the help though.

On 9/8/06, Chris Mear <chris-OIzkuoyqg0kAvxtiuMwx3w@public.gmane.org>
wrote:
> Rich Brant wrote:
> > When in production mode, when an error occurrs I get the white screen
error:
> >
> > Application error (Rails),
> >
> > And, I can''t seem to override the method
rescue_action_in_public, even
> > though I''m *certain* local_request? is returning false.
>
> What is the error, and where are you redefining
> rescue_action_in_public?
>
> Some Rails errors sort of occur before your controller ever enters the
> picture (don''t ask me for details!). If you''re redefining
> rescue_action_in_public in your controller (or even in your
> ApplicationController, I think), errors like that will trigger the
> built-in rescue_action_in_public since Rails hasn''t reached your
> controller yet.
>
> Maybe this is what''s happening in your app? It''s hard to
tell without
> knowing what the exception is, where it''s occurring
> and
> where you''re redefining the method.
>
> In my apps I redefine rescue_action_in_public in a little
''support''
> file in /lib that I include in environment.rb. It seems to catch pretty
> much everything.
>
> /config/environment.rb:
>
> require ''myapp_support''
>
> /lib/myapp_support.rb:
>
> module ActionController
>   module Rescue
>     protected
>     def rescue_action_in_public(exception)
>       case exception
>         when RoutingError, UnknownAction then
>           render_text(IO.read(File.join(RAILS_ROOT,
''public'',
> ''404.html'')), "404 Not Found")
>         else
>           render_text(IO.read(File.join(RAILS_ROOT,
''public'',
> ''500.html'')), "500 Internal Error")
>       end
>     end
>   end
> end
>
> (I''m pretty sure I just copy-pasted this from somewhere in the
past,
> but I can''t remember from where that might have been.)
>
> Chris
>
> >
>

-- 
Rich Brant
http://brantinteractive.com
rbrant-To7aG29cuAKKf2Id4j40wVaTQe2KTcn/@public.gmane.org
v. 267.640.2195  f. 215.689.1454

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