Since a while I add sometimes this error while updating my project with svn:

svn update
registerToSubTree : warning, failed to register /path/to/project/.svn/lock :Error watching /path/to/project/.svn/lock : No space left on device

Just do

cat /proc/sys/fs/inotify/max_user_watches
sudo su -
echo <higer value> /proc/sys/fs/inotify/max_user_watches