Title: WP-FFPC stopped caching Last modified: August 22, 2016 --- # WP-FFPC stopped caching * [whatsthatbugcom](https://wordpress.org/support/users/whatsthatbugcom/) * (@whatsthatbugcom) * [11 years, 10 months ago](https://wordpress.org/support/topic/wp-ffpc-stopped-caching/) * Running nginx 1.6.0, memcached 1.5.15, libmemcached 1.0.16, wordpress 4.0 * I was running WP-FFPC on a copy of my site with the siteurl and homepage in wp_options changed to test.whatsthatbug.com. Everything seemed great, and pages were caching. I enabled the debug code so it gets added to the footer of the html, so I could easily tell it was working. Also, webpagespeedtest.org was reporting great things. * So I changed the DNS for [http://www.whatsthatbug.com](http://www.whatsthatbug.com) to the new server, after changing siteurl and homepage back to [http://www.whatsthatbug.com](http://www.whatsthatbug.com) in wp_options. Updated the server_name line in the nginx config file, and restarted nginx. * No more caching. * I restarted memcached and php-fpm. If I telnet to localhost 11211 and look at stats or stats items, there is nothing being cached. * I have looked at this every way I can think of, and I’m getting nowhere. Can you suggest anything to look at? * [https://wordpress.org/plugins/wp-ffpc/](https://wordpress.org/plugins/wp-ffpc/) Viewing 14 replies - 1 through 14 (of 14 total) * Thread Starter [whatsthatbugcom](https://wordpress.org/support/users/whatsthatbugcom/) * (@whatsthatbugcom) * [11 years, 10 months ago](https://wordpress.org/support/topic/wp-ffpc-stopped-caching/#post-5276267) * I thought it might be helpful if I post my nginx config for whatsthatbug.com: * ``` server { # URL: Correct way to redirect URL's server_name whatsthatbug.com test.whatsthatbug.com; rewrite ^/(.*)$ http://www.whatsthatbug.com/$1 permanent; } server { server_name www.whatsthatbug.com; root /www/htdocs/wtb.com; access_log /var/log/nginx/whatsthatbug.com.access.log; error_log /var/log/nginx/whatsthatbug.com.error.log; include templates/common.conf; location ~* \.(?:js|css|png|jpg|jpeg|gif|ico)$ { expires 1m; add_header Pragma public; add_header Cache-Control "public, must-revalidate, proxy-revalidate"; } # SECURITY : Deny all attempts to access PHP Files in the uploads directory location ~* /(?:uploads|files)/.*\.php$ { deny all; } location ~ \.php$ { try_files $uri =404; include /etc/nginx/fastcgi_params; fastcgi_index index.php; fastcgi_pass php5-fpm-sock; fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name; fastcgi_buffers 16 16k; fastcgi_buffer_size 32k; } location / { try_files $uri $uri/ @memcached; } # try to get result from memcached location @memcached { default_type text/html; set $memcached_key data-$scheme://$host$request_uri; set $memcached_request 1; # exceptions # avoid cache serve of POST requests if ($request_method = POST ) { set $memcached_request 0; } # avoid cache serve of wp-admin-like pages, starting with "wp-" if ( $uri ~ "/wp-" ) { set $memcached_request 0; } # avoid cache serve of any URL with query strings if ( $args ) { set $memcached_request 0; } if ($http_cookie ~* "comment_author_|wordpressuser_|wp-postpass_|wordpress_logged_in_" ) { set $memcached_request 0; } if ( $memcached_request = 1) { add_header X-Cache-Engine "WP-FFPC with apc via nginx"; memcached_pass memcached-servers; error_page 404 = @rewrites; } if ( $memcached_request = 0) { rewrite ^ /index.php last; } } ## rewrite rules location @rewrites { add_header X-Cache-Engine ""; rewrite ^ /index.php last; } # PLUGINS : Enable Rewrite Rules for Yoast SEO SiteMap rewrite ^/sitemap_index\.xml$ /index.php?sitemap=1 last; rewrite ^/([^/]+?)-sitemap([0-9]+)?\.xml$ /index.php?sitemap=$1&sitemap_n=$2 last; } ``` * Plugin Author [petermolnar](https://wordpress.org/support/users/cadeyrn/) * (@cadeyrn) * [11 years, 10 months ago](https://wordpress.org/support/topic/wp-ffpc-stopped-caching/#post-5276299) * I WP_CACHE defined and set to true in wp-config.php? * Thread Starter [whatsthatbugcom](https://wordpress.org/support/users/whatsthatbugcom/) * (@whatsthatbugcom) * [11 years, 10 months ago](https://wordpress.org/support/topic/wp-ffpc-stopped-caching/#post-5276319) * It is: * define(‘WP_CACHE’, true); * Thread Starter [whatsthatbugcom](https://wordpress.org/support/users/whatsthatbugcom/) * (@whatsthatbugcom) * [11 years, 10 months ago](https://wordpress.org/support/topic/wp-ffpc-stopped-caching/#post-5276320) * Could this have any relevance? This is scrolling in my php-fpm error logs: * ``` [10-Sep-2014 13:36:01 UTC] PHP Warning: wp-ffpc clearing scheduled hook wp-ffpc-precache-task in /var/www/html/wtb.com/wp-content/plugins/wp-ffpc/wp-common/plugin_utils.php on line 126 [10-Sep-2014 13:36:08 UTC] PHP Warning: wp-ffpc clearing scheduled hook wp-ffpc-precache-task in /var/www/html/wtb.com/wp-content/plugins/wp-ffpc/wp-common/plugin_utils.php on line 126 [10-Sep-2014 13:36:11 UTC] PHP Warning: wp-ffpc clearing scheduled hook wp-ffpc-precache-task in /var/www/html/wtb.com/wp-content/plugins/wp-ffpc/wp-common/plugin_utils.php on line 126 [10-Sep-2014 13:36:11 UTC] PHP Warning: wp-ffpc clearing scheduled hook wp-ffpc-precache-task in /var/www/html/wtb.com/wp-content/plugins/wp-ffpc/wp-common/plugin_utils.php on line 126 [10-Sep-2014 13:36:12 UTC] PHP Warning: wp-ffpc clearing scheduled hook wp-ffpc-precache-task in /var/www/html/wtb.com/wp-content/plugins/wp-ffpc/wp-common/plugin_utils.php on line 126 [10-Sep-2014 13:36:12 UTC] PHP Warning: wp-ffpc clearing scheduled hook wp-ffpc-precache-task in /var/www/html/wtb.com/wp-content/plugins/wp-ffpc/wp-common/plugin_utils.php on line 126 ``` * Plugin Author [petermolnar](https://wordpress.org/support/users/cadeyrn/) * (@cadeyrn) * [11 years, 10 months ago](https://wordpress.org/support/topic/wp-ffpc-stopped-caching/#post-5276323) * could you please check the contents of wp-content/advanced-cache.php? wp-ffpc stores the variables based on the site url, which, in case it changed, might be out of date. * Thread Starter [whatsthatbugcom](https://wordpress.org/support/users/whatsthatbugcom/) * (@whatsthatbugcom) * [11 years, 10 months ago](https://wordpress.org/support/topic/wp-ffpc-stopped-caching/#post-5276330) * advanced-cache.php has 2 sections that are identical except for the server name. One is test.whatsthatbug.com and one is [http://www.whatsthatbug.com](http://www.whatsthatbug.com). * Thread Starter [whatsthatbugcom](https://wordpress.org/support/users/whatsthatbugcom/) * (@whatsthatbugcom) * [11 years, 10 months ago](https://wordpress.org/support/topic/wp-ffpc-stopped-caching/#post-5276338) * I swapped the position of those 2 entries in advanced-cache.php, and pages are being cached – if I telnet localhost 11211, stats and stats cachedump show that there is relevant data. But they are not being served. * These lines are still filling up the php-fpm error log: [10-Sep-2014 15:13:20 UTC] PHP Warning: wp-ffpc clearing scheduled hook wp-ffpc-precache-task in /var/ www/html/wtb.com/wp-content/plugins/wp-ffpc/wp-common/plugin_utils.php on line 126 * Any thoughts on why the cached pages aren’t being served now? * Thread Starter [whatsthatbugcom](https://wordpress.org/support/users/whatsthatbugcom/) * (@whatsthatbugcom) * [11 years, 10 months ago](https://wordpress.org/support/topic/wp-ffpc-stopped-caching/#post-5276376) * Well, it looks like it *is* serving cached pages. Something is screwy with my browser cache. Not being logged in wasn’t good enough, but an incognito window showed me the truth. Thank you for taking a stab at it, and for writing the plugin! * Any idea on the PHP Warnings? They are still coming fast and furious. * Plugin Author [petermolnar](https://wordpress.org/support/users/cadeyrn/) * (@cadeyrn) * [11 years, 10 months ago](https://wordpress.org/support/topic/wp-ffpc-stopped-caching/#post-5276397) * I’ve been bitten by that with Chromium as well. I have a feeling one of the cookies is not removed once logged out and due to it’s presence, there is no caching. * I’ll take a look into this, it looks like it’s not just me 🙂 * [LeoKesler](https://wordpress.org/support/users/leokesler/) * (@leokesler) * [11 years, 10 months ago](https://wordpress.org/support/topic/wp-ffpc-stopped-caching/#post-5276430) * About this cookie thing… I never logged in my site using IE. * But, using IE11, **sometimes** it dont cache the page. It always give the no cached. There is not the debug comment in source code of page. And the ab test is a total fail… (I use ab to test if it is all OK with cache) If I clear the cache/cookies and reload the page, the page is fully cached. * Chrome always cache the page if I am not logged. However, I cant be 100% sure because I dont like to use Chrome, I still use Firefox. * Thread Starter [whatsthatbugcom](https://wordpress.org/support/users/whatsthatbugcom/) * (@whatsthatbugcom) * [11 years, 10 months ago](https://wordpress.org/support/topic/wp-ffpc-stopped-caching/#post-5276439) * Peter, do you have any idea why php-fpm is logging so may warnings like this? * `[10-Sep-2014 15:13:20 UTC] PHP Warning: wp-ffpc clearing scheduled hook wp-ffpc- precache-task in /var/www/html/wtb.com/wp-content/plugins/wp-ffpc/wp-common/plugin_utils. php on line 126` * I’d really like to be able to get that to stop! * Plugin Author [petermolnar](https://wordpress.org/support/users/cadeyrn/) * (@cadeyrn) * [11 years, 10 months ago](https://wordpress.org/support/topic/wp-ffpc-stopped-caching/#post-5276449) * @whatsthatbug.com please update to 1.6.3, it should have changed this to NOTICE level. * [@leokesler](https://wordpress.org/support/users/leokesler/) These are the cookies I look for: [https://github.com/petermolnar/wp-ffpc/blob/master/wp-ffpc-backend.php#L57](https://github.com/petermolnar/wp-ffpc/blob/master/wp-ffpc-backend.php#L57). Could you please list what cookies IE stores about your site when you’re not logged in? * [LeoKesler](https://wordpress.org/support/users/leokesler/) * (@leokesler) * [11 years, 10 months ago](https://wordpress.org/support/topic/wp-ffpc-stopped-caching/#post-5276452) * After a clear history/cookie and a reload, these are the cookies: * [leo@disqus.com](https://wordpress.org/support/topic/wp-ffpc-stopped-caching/leo@disqus.com?output_format=md) [leo@doubleclick.net](https://wordpress.org/support/topic/wp-ffpc-stopped-caching/leo@doubleclick.net?output_format=md) [leo@facebook.com](https://wordpress.org/support/topic/wp-ffpc-stopped-caching/leo@facebook.com?output_format=md) [leo@scorecardresearch.com](https://wordpress.org/support/topic/wp-ffpc-stopped-caching/leo@scorecardresearch.com?output_format=md) [leo@statcounter.com](https://wordpress.org/support/topic/wp-ffpc-stopped-caching/leo@statcounter.com?output_format=md)** [leo@www.mydomain.org](https://wordpress.org/support/topic/wp-ffpc-stopped-caching/leo@www.mydomain.org?output_format=md) [leo@mydomain.org](https://wordpress.org/support/topic/wp-ffpc-stopped-caching/leo@mydomain.org?output_format=md)( only have google analytics info) * For now it is working. Like I said, it happens sometimes. I only use IE to check if the cache is working or if the layout is OK. * Off topic: the time showed in comments (at source page) dont show the correct time. Its showing, I think, the UTC time and not the timezone configured in WordPress( for me, UTC-3). * Thread Starter [whatsthatbugcom](https://wordpress.org/support/users/whatsthatbugcom/) * (@whatsthatbugcom) * [11 years, 10 months ago](https://wordpress.org/support/topic/wp-ffpc-stopped-caching/#post-5276465) * Thank you. That did stop the “clearing scheduled hook” error. However, I’m now seeing these – not quite as fast and furious, but still at a decent clip: * ``` [13-Sep-2014 00:02:55 UTC] PHP Warning: wp-ffpc unable to determine path from Post Permalink, post ID: 2165860 in /var/www/html/wtb.com/wp-content/plugins/wp-ffpc/wp-common/plugin_utils.php on line 126 [13-Sep-2014 00:02:55 UTC] PHP Warning: wp-ffpc unable to determine path from Post Permalink, post ID: 2165860 in /var/www/html/wtb.com/wp-content/plugins/wp-ffpc/wp-common/plugin_utils.php on line 126 [13-Sep-2014 00:03:03 UTC] PHP Warning: wp-ffpc unable to determine path from Post Permalink, post ID: 2165861 in /var/www/html/wtb.com/wp-content/plugins/wp-ffpc/wp-common/plugin_utils.php on line 126 [13-Sep-2014 00:03:03 UTC] PHP Warning: wp-ffpc unable to determine path from Post Permalink, post ID: 2165861 in /var/www/html/wtb.com/wp-content/plugins/wp-ffpc/wp-common/plugin_utils.php on line 126 [13-Sep-2014 00:03:07 UTC] PHP Warning: wp-ffpc unable to determine path from Post Permalink, post ID: 2165862 in /var/www/html/wtb.com/wp-content/plugins/wp-ffpc/wp-common/plugin_utils.php on line 126 [13-Sep-2014 00:03:07 UTC] PHP Warning: wp-ffpc unable to determine path from Post Permalink, post ID: 2165862 in /var/www/html/wtb.com/wp-content/plugins/wp-ffpc/wp-common/plugin_utils.php on line 126 ``` * Is this anything to be concerned about? Or should it be Notice instead of Warning? Viewing 14 replies - 1 through 14 (of 14 total) The topic ‘WP-FFPC stopped caching’ is closed to new replies. * ![](https://s.w.org/plugins/geopattern-icon/wp-ffpc_ffffff.svg) * [WP-FFPC](https://wordpress.org/plugins/wp-ffpc/) * [Frequently Asked Questions](https://wordpress.org/plugins/wp-ffpc/#faq) * [Support Threads](https://wordpress.org/support/plugin/wp-ffpc/) * [Active Topics](https://wordpress.org/support/plugin/wp-ffpc/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/wp-ffpc/unresolved/) * [Reviews](https://wordpress.org/support/plugin/wp-ffpc/reviews/) * 14 replies * 3 participants * Last reply from: [whatsthatbugcom](https://wordpress.org/support/users/whatsthatbugcom/) * Last activity: [11 years, 10 months ago](https://wordpress.org/support/topic/wp-ffpc-stopped-caching/#post-5276465) * Status: not resolved