Title: [Plugin: WP-FFPC] Backend status: down?
Last modified: August 20, 2016

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# [Plugin: WP-FFPC] Backend status: down?

 *  Resolved [hausinteractive](https://wordpress.org/support/users/hausinteractive/)
 * (@hausinteractive)
 * [13 years, 9 months ago](https://wordpress.org/support/topic/plugin-wp-ffpc-backend-status-down/)
 * Hi.
 * Using:
 * – FFPC 0.4.1
    – WordPress 3.2.1 – apache mod_php – memcached 1.4.10
 * CLI suggests that memcache is running:
 *     ```
       telnet localhost 11211
       Trying 127.0.0.1...
       Connected to localhost.
       Escape character is '^]'.
       stats
       STAT pid 23002
       STAT uptime 15264076
       STAT time 1345821310
       STAT version 1.4.10
       STAT libevent 1.4.12-stable
       STAT pointer_size 32
       STAT rusage_user 1434.026495
       STAT rusage_system 9286.831125
       STAT curr_connections 5
       ```
   
 * etc…
 * I have added the necessary define(‘WP_CACHE’,true); to the config file and set
   the plugin settings to:
 * hostname: localhost
    port: 11211
 * …but the “Settings for memecached backend” state:
 * Backend status: **DOWN**.
 * Is this a false positive or is something else wrong?
 * I’ve turned on “Enable debug mode” and “Enable syslog messages” but am not sure
   where to gather the results.
 * Thanks in advance.
 * [http://wordpress.org/extend/plugins/wp-ffpc/](http://wordpress.org/extend/plugins/wp-ffpc/)

Viewing 9 replies - 1 through 9 (of 9 total)

 *  Thread Starter [hausinteractive](https://wordpress.org/support/users/hausinteractive/)
 * (@hausinteractive)
 * [13 years, 9 months ago](https://wordpress.org/support/topic/plugin-wp-ffpc-backend-status-down/#post-2992324)
 * Update: Just downloaded and ran a copy of [http://code.google.com/p/memcache-top/](http://code.google.com/p/memcache-top/)(
   which is kind of cool, btw) and while hammering on a site running FFPC I did 
   not see the stats do much of anything.
 * This leads me to suspect that the Backend status: DOWN message is accurate.
 * If I’m right then the question becomes: Why is the plugin seeing memcache as 
   down when it is not?
 *  Plugin Author [petermolnar](https://wordpress.org/support/users/cadeyrn/)
 * (@cadeyrn)
 * [13 years, 9 months ago](https://wordpress.org/support/topic/plugin-wp-ffpc-backend-status-down/#post-2992489)
 * Hi hausinteractive,
 * Which PHP memcache module are you using: Memcache or Memcached?
    Could you please
   send me the config of the PHP module as well?
 *  Thread Starter [hausinteractive](https://wordpress.org/support/users/hausinteractive/)
 * (@hausinteractive)
 * [13 years, 9 months ago](https://wordpress.org/support/topic/plugin-wp-ffpc-backend-status-down/#post-2992494)
 * Hi Peter,
 * We are running memcached
 * I am emailing the config to the address listed on your website.
 * Cheers.
 * —
    Aaron
 *  [clearpointccs](https://wordpress.org/support/users/clearpointccs/)
 * (@clearpointccs)
 * [13 years, 9 months ago](https://wordpress.org/support/topic/plugin-wp-ffpc-backend-status-down/#post-2992500)
 * I am having this same issue.
    I’m using Nginx, and copy-pasted your example config
   included with the plugin, and also reinstalled memcached and the memcache extension
   using the instructions [here](http://www.sohailriaz.com/how-to-install-memcached-with-memcache-php-extension-on-centos-5x/).
   I can interact with memcached on the CLI, and php info shows that the memcache
   extension is loaded, the the WP-FFPC plugin shows that it’s down.
 * I’m happy to send you any files at all which can help diagnose the issue!
 *  Plugin Author [petermolnar](https://wordpress.org/support/users/cadeyrn/)
 * (@cadeyrn)
 * [13 years, 3 months ago](https://wordpress.org/support/topic/plugin-wp-ffpc-backend-status-down/#post-2992565)
 * I think this is related to a bug in the memcache plugin and I currently unable
   to solve it; please keep posting anything related this bug that’d help.
 *  Plugin Author [petermolnar](https://wordpress.org/support/users/cadeyrn/)
 * (@cadeyrn)
 * [13 years, 3 months ago](https://wordpress.org/support/topic/plugin-wp-ffpc-backend-status-down/#post-2992566)
 * Hi,
 * I’ve completely rewritten the memcached backend check in version 0.6.1
    Could
   you please send me the results with that version?
 * Cheers,
    Peter
 *  Thread Starter [hausinteractive](https://wordpress.org/support/users/hausinteractive/)
 * (@hausinteractive)
 * [13 years, 3 months ago](https://wordpress.org/support/topic/plugin-wp-ffpc-backend-status-down/#post-2992567)
 * Hi Peter,
 * I’ve downloaded 0.6.1 and when saving the settings I get this:
 * ERROR: Memcached cache backend activated but no PHP memcached extension was found.
 * I see this in our server error logs:
 * [Fri Mar 08 08:22:26 2013] [error] PHP Fatal error: Call to a member function
   flush() on a non-object in /directory/wp-content/plugins/wp-ffpc/wp-ffpc-common.
   php on line 196, referer: [http://domain.com/wp-admin/options-general.php?page=wp-ffpcoptions](http://domain.com/wp-admin/options-general.php?page=wp-ffpcoptions)
 * Additionally, I see this message in the settings:
 * Backend status: 127.0.0.1:11212 => unknown, please try re-saving settings!
 * Nothing has changed in our server software from my first post but my test copy
   of WordPress is now 3.5.1 and our wordpress memcache instance is now on port 
   11212.
 *  Plugin Author [petermolnar](https://wordpress.org/support/users/cadeyrn/)
 * (@cadeyrn)
 * [13 years, 3 months ago](https://wordpress.org/support/topic/plugin-wp-ffpc-backend-status-down/#post-2992568)
 * Hi hausinteractive,
 * The message `ERROR: Memcached cache backend activated but no PHP memcached extensio"
   n was found.` comes gets displayed if the following happens:
 * `<?php if ( $this->options['cache_type'] == 'memcached' && !class_exists('Memcached')):?
   >`
 * That means there’s no Memcache**d** class on the server. Please change to memcache
   mode as backend option or install PHP Memcache**d** extension.
    You most probably
   has Memcache extension ( not the missing d at the end ).
 *  Thread Starter [hausinteractive](https://wordpress.org/support/users/hausinteractive/)
 * (@hausinteractive)
 * [13 years, 3 months ago](https://wordpress.org/support/topic/plugin-wp-ffpc-backend-status-down/#post-2992569)
 * Strange, I swore we had memcached and yet there it is: working using the “memcache”
   option. I now see:
 *     ```
       Backend status:
       127.0.0.1:11212 => up & running
       ```
   
 * Cheers.

Viewing 9 replies - 1 through 9 (of 9 total)

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 * 9 replies
 * 3 participants
 * Last reply from: [hausinteractive](https://wordpress.org/support/users/hausinteractive/)
 * Last activity: [13 years, 3 months ago](https://wordpress.org/support/topic/plugin-wp-ffpc-backend-status-down/#post-2992569)
 * Status: resolved