It happened to me when I forgot uploading wp-cron.php after updating to 2.1.
The Scheduler tried to reach wp-cron.php which wasn't found. The request was therefore directed to index.php, recursively triggering the scheduler again.
I noticed when I received a mail from my hoster about shutting my site down because it caused too much load on the server.
Now this shouldn't happen under normal circumstances but the effect is quite severe when it happens. Issues with .htaccess could cause this too. I haven't completely checked out the cron mechanism yet but this seems weakly designed somehow.
A quick solution that comes to my mind right now would be to check for the GET Path before triggering the call to the wp-cron.php. If we are already handling a wp-cron request, something must have gone wrong and wp-cron should not be called again in the current session.
This is an ugly hack, I hope someone comes up with something smarter.
EXAMPLE OF SYMPTOM:
mar jan 30 11:22:45 CET 2007 : sainteli04 : Query 12 SELECT option_name,
option_value FROM cv_options WHERE autoload =
'yes' |
mar jan 30 11:22:45 CET 2007 : sainteli04 : Query 12 SELECT option_name,
option_value FROM cv_options WHERE autoload =
'yes' |
mar jan 30 11:22:45 CET 2007 : sainteli04 : Query 12 SELECT option_name,
option_value FROM cv_options WHERE autoload =
'yes' |
mar jan 30 11:22:45 CET 2007 : sainteli04 : Query 12 SELECT option_name,
option_value FROM cv_options WHERE autoload =
'yes' |
mar jan 30 11:22:45 CET 2007 : sainteli04 : Query 11 SELECT option_value
FROM cv_options WHERE option_name =
'siteurl' |
mar jan 30 11:22:47 CET 2007 : sainteli04 : Killed 15 SELECT cv_posts.*
FROM cv_posts WHERE 1=1 AND post_name = 'wp-cronphp' AND (post_type =
'post') |
mar jan 30 11:22:47 CET 2007 : sainteli04 : Killed 15 SELECT cv_posts.*
FROM cv_posts WHERE 1=1 AND post_name = 'wp-cronphp' AND (post_type =
'post') |
mar jan 30 11:22:47 CET 2007 : sainteli04 : Killed 15 SELECT cv_posts.*
FROM cv_posts WHERE 1=1 AND post_name = 'wp-cronphp' AND (post_type =
'post') |
mar jan 30 11:22:47 CET 2007 : sainteli04 : Killed 15 SELECT option_name,
option_value FROM cv_options WHERE autoload =
'yes' |
mar jan 30 11:22:50 CET 2007 : sainteli04 : Killed 17 SELECT cv_posts.*
FROM cv_posts WHERE 1=1 AND post_name = 'wp-cronphp' AND (post_type =
'post') |
mar jan 30 11:22:50 CET 2007 : sainteli04 : Killed 17 SELECT cv_posts.*
FROM cv_posts WHERE 1=1 AND post_name = 'wp-cronphp' AND (post_type =
'post') |
mar jan 30 11:22:50 CET 2007 : sainteli04 : Killed 17 SELECT cv_posts.*
FROM cv_posts WHERE 1=1 AND post_name = 'wp-cronphp' AND (post_type =
'post') |
mar jan 30 11:22:50 CET 2007 : sainteli04 : Killed 17 SELECT option_name,
option_value FROM cv_options WHERE autoload =
'yes' |
