This message means too much symlink levels in french:
ls -l /var/www/html_local/virtualdomains/302/zzz/documents/shared/
ls: impossible d’accéder à /var/www/html_local/virtualdomains/302/zzz/documents/shared/: Trop de niveaux de liens symboliques
dmesg -T | grep gene
[sam. mai 27 02:50:04 2017] traps: file indexing[21800] general protection ip:5bf1b5 sp:7f2e7b7fc000 error:0 in urbackupclientbackend[400000+33e000]
[lun. mai 29 17:04:18 2017] traps: file indexing[8698] general protection ip:5bf1b5 sp:7f452e7fa000 error:0 in urbackupclientbackend[400000+33e000]
[lun. mai 29 17:05:27 2017] traps: file indexing[10487] general protection ip:5bf1b5 sp:7f4696ffb000 error:0 in urbackupclientbackend[400000+33e000]
grep -A1 ‘Backing up “.symlink_shared” without snapshot.’ /var/log/urbackupclient.log
2017-05-11 15:12:51: Backing up “.symlink_shared” without snapshot.
2017-05-11 15:23:15: SQLite: recovered 727 frames from WAL file /opt/urbackup-client/var/urbackup/backup_client.db-wal code: 283
2017-05-11 15:23:41: Backing up “.symlink_shared” without snapshot.
2017-05-13 23:56:50: SQLite: recovered 729 frames from WAL file /opt/urbackup-client/var/urbackup/backup_client.db-wal code: 283
2017-05-14 00:12:46: Backing up “.symlink_shared” without snapshot.
2017-05-23 13:00:27: SQLite: recovered 741 frames from WAL file /opt/urbackup-client/var/urbackup/backup_client.db-wal code: 283
2017-05-23 13:03:20: Backing up “.symlink_shared” without snapshot.
2017-05-27 00:50:05: SQLite: recovered 748 frames from WAL file /opt/urbackup-client/var/urbackup/backup_client.db-wal code: 283
2017-05-27 00:51:27: Backing up “.symlink_shared” without snapshot.
2017-05-29 15:03:49: SQLite: recovered 755 frames from WAL file /opt/urbackup-client/var/urbackup/backup_client.db-wal code: 283
2017-05-29 15:05:18: Backing up “.symlink_shared” without snapshot.
2017-05-29 15:06:07: SQLite: recovered 762 frames from WAL file /opt/urbackup-client/var/urbackup/backup_client.db-wal code: 283