memory exception when editing page

[dietuyt]

I found out there is a serious bug causing the site to hang sometimes.

It happens eg when doing the following:

go to ​http://www.clarin.eu/node/2470 and click on "edit"

This throws an out of memory exception:

[Mon Nov 15 11:39:57 2010] [error] [client 172.16.16.23] PHP Fatal
error: Allowed memory size of 268435456 bytes exhausted (tried to
allocate 16 bytes) in /var/www/drupal/includes/database.inc on line 202, referer: ​http://www.clarin.eu/node/2470

The bug is caused by the hierarchy module that is installed at:

/var/www/drupal/sites/all/modules/hierarchy

However I think that Corina has altered the code of this module, as
indicated by the "(custom CLARIN module)" note at
​http://www.clarin.eu/admin/build/modules

So you might need to do a diff with the original sources of the module to find out where things went wrong:

​http://drupal.org/project/nodehierarchy

[dietuyt]

workaround (you need admin permissions at the clarin.eu site to do this - Twan has these permissions):

go to ​http://www.clarin.eu/admin/build/modules
go to CLARIN Custom Modules and remove the checkbox before Hierarchy and scroll down and click on Save configuration
go to the page and change it

go back to ​http://www.clarin.eu/admin/build/modules > CLARIN Custom Modules and re-enable the hierchy module

[dietuyt]

Fixed for clarin.eu/cmdi by manually changing the parent_nid in the hierarchy table. The problem was that the node id and the parent node id where similar, most probably resulting in an endless loop.