[wp-trac] [WordPress Trac] #10638: Wordpress would randomly fail, because of server configuration

[WordPress Trac]

#10638: Wordpress would randomly fail, because of server configuration
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 Reporter:  kiprasm       |       Owner:                                
     Type:  defect (bug)  |      Status:  new                           
 Priority:  normal        |   Milestone:  2.8.5                         
Component:  General       |     Version:  2.8.1                         
 Severity:  critical      |    Keywords:  implicit_flush,random failures
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 Hey,
 this is a bug report + plus an actual way to fix it.

 Basically, i just had an entire half of day of headaches, of why wordpress
 fails randomly. Sometimes it wont save pages, sometimes the voting plugin
 won't work, sometimes blog activation or image uploading would fail etc.
 etc.

 Turns out it is my server configuration, which did not implicitly flush
 the output buffer after a script has finished executing (php.ini
 implicit_flush was set to 'Off'). Because of that, some ajax scripts would
 not work, wp-admin/index.php would freeze (left sidebar menu items would
 not expand after clicking on the arrows on the right), activation script
 was broken (only the top half would be shown), sometimes redirects would
 fail, throwing just blank pages (after a post edit for example), i could
 go on and on.. And all of this was fixed very easily (i am actually very
 surprised, has it never happened to other people??).

 To fix it, i've added these 2 lines to wp-config.php:

 ini_set('implicit_flush', 'On');
 ob_implicit_flush();

 Works like a charm now. I really think you should consider adding these
 lines to the default Wordpress package as well.

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Ticket URL: <http://core.trac.wordpress.org/ticket/10638>
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