if proxy_read_timeout - then do something?

[shrinath.m]

I tried to catch 504, not working. Anything wrong in the following? 


error_page 504 =200 @checkstatus;

location @checkstatus
{
    rewrite ^(.*)$ /k/binarystatus/check?original_uri=$1 break;
    proxy_pass https://shrinath.blah.com;
    proxy_hide_header Last-Modified;
    proxy_read_timeout 10s;
    proxy_intercept_errors on;
}

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,224764,224776#msg-224776