Disabling APC resolved 2 freuqent fatal AI1EC plugin errors

From
Timely Support Agent
Date
22 days ago
Message

Hi Daniel,
errors like this are caused by APC:

https://bugs.php.net/bug.php?id=59298

If you go to the file you see

if ( ! class_exists( 'WP_FacebookApiException' ) ):
/**
* Thrown when an API call returns an exception.
*
* @author Naitik Shah naitik@facebook.com
*/
class WP_FacebookApiException extends Exception

with APC enabled class_exists( 'WP_FacebookApiException' ) calls unfortunately are somehow broken. This is a known PHP bug. You can:

1) update the PHP version to the latest
2) try to up the memory allowed for APC as usually errors like this means that cache memory has ended.
3) turn off APC completely

you should try number 1 and 2 before going to number 3 as APC speeds up the site a lot as it does opcode caching. There are no other known fixes for this, until the PHP team finally decides they need to fix this bug

Thanks
From
Timely Support Agent
Date
2 days ago
Message
---------------------------------------------
RE: WP_FacebookApiException
---------------------------------------------
I would like to propose another solution to this problem. Namely, to create a patch or admin-option for the plugin that allows an administrator to disable all things Facebook. If this is a known PHP bug, persistent enough to have affected WP installations at a variety of hosts, then it seems to me that the onus is on you, the plugin author, to allow a way to avoid the bug. Disabling the Facebook API would seem to solve that problem. At this point, my installations have no interaction whatsoever with facebook.

---------------------------------------------
RE: Missing class information for in .../wp-content/plugins/all-in-one-event-calendar/lib/lessphp/lessc.inc.php
---------------------------------------------

Your most recent reply has not made mention of this error. Would you prefer I open up a separate thread for this?

Thanks,
From
Timely Support Agent
Date
2 days ago
Message
(I have elected to open a separate thread for "Missing class information for in .../wp-content/plugins/all-in-one-event-calendar/lib/lessphp/lessc.inc.php")
From
Timely Support Agent
Date
2 days ago
Message
Hi Daniel,
both problem are related to that APC bug that I've linked to you. The problem is that in certain case APC (that is a software layer that cache information about classes to speedup the response) exhaust its memory and start losing information about the class used. The Less class or the Facebook class doesn't have anything in particular that creates problem, it's just that when it's their turn to be loaded the memory is probably near it's limit, if I remove all the classes related to Facebook for example you will get the same error in the class loaded next to that.

Thanks
From
Timely Support Agent
Date
a day ago
Message
Do you recommend making these settings within wordpress using ini_set, or in php.ini?

Thanks,
From
Timely Support Agent
Date
a day ago
Message
Hi Daniel,
I think that you have to work on the php.ini file, I'm not sure but I don't think that you can modify APC parameters using ini_set(). The best solution would be to increase its memory.

Thanks