White Screen of Death due to taxonomy parent-child infinite loop

The site stopped showing. Nothing.

What I should have done first:

tail -f /var/log/apache2/error.log

0 stedile:~# apache2ctl restart

0 stedile:~# /etc/init.d/mysql restart

Stopping MySQL database server: mysqld.
Starting MySQL database server: mysqld . . . . ..
Checking for corrupt, not cleanly closed and upgrade needing tables..

0 stedile:~# xm console stedile
-bash: xm: command not found

127 stedile:~# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda1 1008M 297M 661M 31% /
tmpfs 657M 0 657M 0% /lib/init/rw
udev 10M 36K 10M 1% /dev
tmpfs 657M 4.0K 657M 1% /dev/shm
/dev/sda3 3.0G 520M 2.3G 19% /usr
/dev/sda4 5.0G 1.1G 3.7G 23% /var
/dev/sda5 20G 173M 19G 1% /var/log/mysql

# top

Linux stedile 2.6.18-5-xen-686 #1 SMP Wed Oct 3 04:02:16 UTC 2007 i686
top - 13:02:31 up 9 days, 16:54, 1 user, load average: 1.26, 1.30, 1.52
Tasks: 47 total, 5 running, 42 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.0%us, 0.0%sy, 0.0%ni, 0.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 1343636k total, 762080k used, 581556k free, 126040k buffers
Swap: 524280k total, 40k used, 524240k free, 188508k cached

29036 www-data 25 0 146m 118m 4240 R 88.7 9.1 0:31.10 apache2
29039 www-data 23 0 37692 9.8m 4212 S 11.7 0.8 0:33.38 apache2
1 root 15 0 1956 644 552 S 0.0 0.0 0:00.62 init

Fatal error: Allowed memory size of 141557760 bytes exhausted (tried to allocate 35 bytes) in /var/www/d53/modules/taxonomy/taxonomy.module on line 1019

line 989

function taxonomy_get_tree($vid, $parent = 0, $depth = -1, $max_depth = NULL)

Resolution