Causes issues with MU & Domain Mapping

domain_mapping.php, line 173 contains

$wpdb->query( $wpdb->prepare( "DELETE FROM {$wpdb->dmtable} WHERE domain = %s", $domain ) );

A lot of questions to get behind this:

I’m not sure if this message is caused by WP-Piwik? Maybe a recursion is used there by the domain_mapping plugin?

Did you have a look at this one: https://stackoverflow.com/questions/8656089/solution-for-fatal-error-maximum-function-nesting-level-of-100-reached-abor ?

What is the domain_mapping plugin expected to do in this context?

This evening I’ll try to install the mapping plugin at my development system. Maybe I can reconstruct your issue.

I do not have xdebug configured on that system, nor do we use Zend.
Turns out the domain mapping module wasn’t even needed for this site, but disabled the mapping didn’t change a thing.

I presume that the 100 nested functions stems from the fact that we have over 45 sites in our piwik installation, making the plugin do 45 times

[...]
[Thu Feb 07 17:51:48 2013] [error] [client 192.168.97.1] PHP  34. wp_piwik->callPiwikAPI() /var/www/wp.domain.tld/wp-content/plugins/wp-piwik/wp-piwik.php:867, referer: https://subdomain.domain.tld/wp-admin/options-general.php?page=wp-piwik/wp-piwik.php
[Thu Feb 07 17:51:48 2013] [error] [client 192.168.97.1] PHP  35. wp_piwik->addPiwikSite() /var/www/wp.domain.tld/wp-content/plugins/wp-piwik/wp-piwik.php:968, referer: https://subdomain.domain.tld/wp-admin/options-general.php?page=wp-piwik/wp-piwik.php
[...]

..but that’s just a wild guess.
And before that we have:

[Thu Feb 07 17:51:48 2013] [error] [client 192.168.97.1] PHP   7. wp_piwik->__construct() /var/www/wp.domain.tld/wp-content/plugins/wp-piwik/wp-piwik.php:1474, referer: https://subdimain.domain.tld/wp-admin/options-general.php?page=wp-piwik/wp-piwik.php
[Thu Feb 07 17:51:48 2013] [error] [client 192.168.97.1] PHP   8. wp_piwik->applySettings() /var/www/wp.domain.tld/wp-content/plugins/wp-piwik/wp-piwik.php:162, referer: https://subdimain.domain.tld/wp-admin/options-general.php?page=wp-piwik/wp-piwik.php

I could probably send you the complete traceback though.

Thank you for sending your trackback.

I’ll try to figure this out.

I currently reduce the function calls and try to optimize the plugin’s “overall behavior”, too. The changes will be released in 0.9.8.1 soon.

Please try 0.9.8.1 – I hope this will solve your issue.

This issue was resolved. See https://www.ads-software.com/support/topic/subdomains-not-loading?replies=10