Title: [Plugin: WP Super Cache] Irregular Internal Server Errors
Last modified: August 19, 2016

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# [Plugin: WP Super Cache] Irregular Internal Server Errors

 *  [imperfectparent](https://wordpress.org/support/users/imperfectparent/)
 * (@imperfectparent)
 * [15 years, 2 months ago](https://wordpress.org/support/topic/plugin-wp-super-cache-irregular-internal-server-errors/)
 * Ever since the installation of WP Super Cache, my blog has been prone to irregular
   internal server errors, a.k.a the “white screen of death” on Firefox. This happens
   both on the front end as well as in the admin area.
 * Sometimes, I am able to refresh a few times and the content will come back up(
   although my visitors aren’t going to do that).
 * A few days ago, however, the “white screen” refused to go away, so I disabled
   the Super Cache plugin and instantaneously my site returned without any trouble,
   so it sure is leaning towards this plugin as the culprit.
 * Any suggestions as to what the problem might be and how to fix it?
 * Thanks!

Viewing 6 replies - 1 through 6 (of 6 total)

 *  Plugin Author [Donncha O Caoimh (a11n)](https://wordpress.org/support/users/donncha/)
 * (@donncha)
 * [15 years, 2 months ago](https://wordpress.org/support/topic/plugin-wp-super-cache-irregular-internal-server-errors/#post-1998595)
 * Check your PHP error log. I don’t know where it is on your system but it should
   give you some details about what’s happening when this occurs.
 *  Thread Starter [imperfectparent](https://wordpress.org/support/users/imperfectparent/)
 * (@imperfectparent)
 * [15 years, 2 months ago](https://wordpress.org/support/topic/plugin-wp-super-cache-irregular-internal-server-errors/#post-1998616)
 * Seeing several of these errors in a row from around the time of a “white screen”
   instance this morning (probably because I kept refreshing):
 * [25-Mar-2011 11:28:51] PHP Warning: include(): GC cache entry ‘/hsphere/local/
   home/username/sitename/wp-content/plugins/wp-super-cache/wp-cache-phase2.php’(
   dev=64769 ino=16744742) was on gc-list for 3601 seconds in /hsphere/local/home/
   username/sitename/topics/wp-content/themes/topics101510/header.php on line 5
 * (replaced real username/sitename, but rest of error as is)
 *  Plugin Author [Donncha O Caoimh (a11n)](https://wordpress.org/support/users/donncha/)
 * (@donncha)
 * [15 years, 2 months ago](https://wordpress.org/support/topic/plugin-wp-super-cache-irregular-internal-server-errors/#post-1998956)
 * That’s probably something to do with a PHP cache/optimizer like APC or Xcache.
   Do you have something like that installed?
 *  Thread Starter [imperfectparent](https://wordpress.org/support/users/imperfectparent/)
 * (@imperfectparent)
 * [15 years, 2 months ago](https://wordpress.org/support/topic/plugin-wp-super-cache-irregular-internal-server-errors/#post-1998965)
 * My host does have a PHP optimizer installed, but I do not remember which one.
 * Are you saying that may be causing the “white screen” or simply that’s only causing
   the error I posted?
 *  Plugin Author [Donncha O Caoimh (a11n)](https://wordpress.org/support/users/donncha/)
 * (@donncha)
 * [15 years, 2 months ago](https://wordpress.org/support/topic/plugin-wp-super-cache-irregular-internal-server-errors/#post-1998969)
 * Yes, the optimizer might be causing the white screen and that error.
 *  Thread Starter [imperfectparent](https://wordpress.org/support/users/imperfectparent/)
 * (@imperfectparent)
 * [15 years, 2 months ago](https://wordpress.org/support/topic/plugin-wp-super-cache-irregular-internal-server-errors/#post-1998970)
 * OK, we’ll do some testing and see what happens.
 * Thanks for your help, and your plugin!

Viewing 6 replies - 1 through 6 (of 6 total)

The topic ‘[Plugin: WP Super Cache] Irregular Internal Server Errors’ is closed 
to new replies.

 * ![](https://ps.w.org/wp-super-cache/assets/icon-256x256.png?rev=3506220)
 * [WP Super Cache](https://wordpress.org/plugins/wp-super-cache/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/wp-super-cache/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/wp-super-cache/)
 * [Active Topics](https://wordpress.org/support/plugin/wp-super-cache/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/wp-super-cache/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/wp-super-cache/reviews/)

 * 6 replies
 * 2 participants
 * Last reply from: [imperfectparent](https://wordpress.org/support/users/imperfectparent/)
 * Last activity: [15 years, 2 months ago](https://wordpress.org/support/topic/plugin-wp-super-cache-irregular-internal-server-errors/#post-1998970)
 * Status: not resolved