Rails - Oct 2005 - Intermittent 'rails application failed to start' error

I have an import script in a web app using rails.
It is run via Ajax updater requests, so the page doesn''t reload but we 
can still have a progress monitor.

The ajax call is to a page which does a small amount of work and then 
returns the % complete and JS to call another ajax update. This works 
well and we have a nice progress monitor of what''s going on.

The whole process takes about 1/2 hour and every now and again I''m 
getting an ''Rails application failed to start'' 500 error from
the server.

It''s annoying that it''s intermittent and I can''t
recreate it when I want
so it''s hard to test for.

Nothing in the logs that I can see.
It only happens on this page and at some point during the import.

Anyone any ideas on
a) why it may be happening
b) what I can do to stop it or at least just stop the message reaching 
the browser

Thanks in advance.

-- 
R.Livsey
http://livsey.org

Rails Version? FastCGI version? SCGI version? Windows? Linux?

With Rails 0.13.1 under Windows 2K Apache + FastCGI that error was
extremly common. Using SCGI I got rid of it.

Off Topìc: Isn''t such a huge transfer process a littel bit hard to do
it over HTTP?

--
Aníbal Rojas
anibalrojas-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org


On 10/29/05, Richard Livsey
<richard-gfRugNUWsoQdnm+yROfE0A@public.gmane.org>
wrote:
> I have an import script in a web app using rails.
> It is run via Ajax updater requests, so the page doesn''t reload
but we
> can still have a progress monitor.
>
> The ajax call is to a page which does a small amount of work and then
> returns the % complete and JS to call another ajax update. This works
> well and we have a nice progress monitor of what''s going on.
>
> The whole process takes about 1/2 hour and every now and again I''m
> getting an ''Rails application failed to start'' 500 error
from the server.
>
> It''s annoying that it''s intermittent and I can''t
recreate it when I want
> so it''s hard to test for.
>
> Nothing in the logs that I can see.
> It only happens on this page and at some point during the import.
>
> Anyone any ideas on
> a) why it may be happening
> b) what I can do to stop it or at least just stop the message reaching
> the browser
>
> Thanks in advance.
>
> --
> R.Livsey
> http://livsey.org
>
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>