I just tried using error_pages and have my post_subrequest return the error code as Maxim had suggested.

That works very well. The only oddity is that I get two post_subrequest callback for a single subrequest. That is something I can handle my module.

Thanks for your help.
-Umesh

________________________________________
From: Eugaia [ngx.eugaia@gmail.com]
Sent: Wednesday, December 22, 2010 9:36 PM
To: nginx-devel@nginx.org
Subject: Re: Proxy Retry Logic

Hi,

On 23/12/2010 04:25, Sirsiwal, Umesh wrote:
> 0/12/22 20:48:52 [debug] 1637#0: *3 try to use file: "@sub2" "/Users/umesh/nginx/install/html@sub2"
> At least according to this e-mail http://forum.nginx.org/read.php?2,28297 chain, it seems I cannot use named locations in try_files directory except as the last location.
Yes. Sorry - forgot.

How about returning different status codes from your proxies instead,
then have various error_page 434 = @named declarations? You'll
probably need to have recursive_error_pages
(http://wiki.nginx.org/HttpCoreModule#recursive_error_pages) on to work
correctly.

I think error pages can be defined with non-standard error codes.

Marcus.

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