blank page on some micro-cached pages

[Ronald Van Assche]

It seems related to every update on a post and the use of the WP plugin Nginx-Helper

if i add $upstream_cache_status to the log format , nothing is logged.
Should i recompile Nginx 1.5 with some additional modules ?

On the Freebsd port we have : 

[ ] HTTP_UPSTREAM_FAIR    3rd party upstream fair module                 
[ ] HTTP_UPSTREAM_HASH    3rd party upstream hash module                 
[ ] HTTP_UPSTREAM_STICKY  3rd party upstream sticky module

which do I have to select ?




Le 25 nov. 2013 à 15:13, Maxim Dounin <mdounin at mdounin.ru> a écrit :

> Hello!
> 
> On Sat, Nov 23, 2013 at 11:00:52AM +0100, Ronald Van Assche wrote:
> 
>> Running Nginx 1.5.7 on Freebsd 9.1
>> with php-pfm 5.5.3
>> 
>> a wordpress site is "micro-cached" , but for some strange reason 
>> and not always , some pages ( wordpress post or pages even 3 or 
>> 7 days after their publication)  are rendered for some users ( 
>> me and others and not always the same, with different browsers) 
>> as blank pages and the same connexion can read other cached 
>> pages/post with no problems.  
>> 
>> The size of the global site in /cache is 72 Kb. Very small 
>> indeed.
>> 
>> The bad cached pages are logged like this :
>> "GET /url  HTTP/1.1" 200 31
>> 
>> always 200 as a result code, and 31 for its size.. 31 is not the 
>> actual size of the page of course.
>> 
>> If a refresh my local cache ( SHIFT CMD-R) on chrome , the 
>> correct page is reloaded and cached in /cache/x/y/somefile by 
>> nginx.
>> 
>> Any help ?
> 
> Size is suspiciously small, and I would suggest it's some error 
> returned by php.
> 
> You may try adding $upstream_cache_status to access log to get 
> some more details (likely there will be MISS or similar state 
> there, indicating the response was returned by a php).  If it 
> doesn't help, some more hints about debugging can be found here:
> 
> http://wiki.nginx.org/Debugging
> 
> -- 
> Maxim Dounin
> http://nginx.org/en/donation.html
> 
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