[Résolu] Mise à jour foireuse ce soir ou simple warning ?

Salut,

Je venais de voir le rapport de faille concernant le Core de Drupal 7. Aussi, j'ai décidé de faire la màj ce soir.

Voici le message :

$ drush up
Name Installed Version Proposed version Message
Drupal 7.33 7.34 SECURITY UPDATE available
Chaos tools (ctools) 7.x-1.4 7.x-1.5 Mise à jour disponible

Update information last refreshed: mer, 19/11/2014 - 23:46
NOTE: A security update for the Drupal core is available.
Drupal core will be updated after all of the non-core projects are updated.

Code updates will be made to the following projects: Chaos tool suite (ctools) [ctools-7.x-1.5]

Note: A backup of your project will be stored to backups directory if it is not managed by a supported version control system.
Note: If you have made any modifications to any file that belongs to one of these projects, you will have to migrate those modifications after updating.
Do you really want to continue with the update process? (y/n): y
Project ctools was updated successfully. Installed version is now 7.x-1.5.
Backups were saved into the directory /home/floown/drush-backups/admin_monsite/20141119224729/modules/ctools. [ok]

Code updates will be made to drupal core.
WARNING: Updating core will discard any modifications made to Drupal core files, most noteworthy among these are .htaccess and robots.txt. If you have made any modifications to these files, please back them up before updating so that you can re-create your modifications in the updated version of the file.
Note: Updating core can potentially break your site. It is NOT recommended to update production sites without prior testing.

Do you really want to continue? (y/n): y
Project drupal was updated successfully. Installed version is now 7.34.
Backups were saved into the directory /home/floown/drush-backups/admin_monsite/20141119224729/drupal. [ok]
No database updates required [success]
'all' cache was cleared. [success]
Finished performing updates. [ok]

Uncaught exception thrown in shutdown function.

PDOException: SQLSTATE[HY000]: General error: 2006 MySQL server has gone away: DELETE FROM {semaphore}
WHERE (value = :db_condition_placeholder_0) ; Array
(
[:db_condition_placeholder_0] => 16205805546d1e01287551.96416100
)
in lock_release_all() (line 269 of /home/admin/web/monsite.pro/public_html/includes/lock.inc).

PHP Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[HY000]: General error: 2006 MySQL server has gone away' in /home/admin/web/monsite.pro/public_html/includes/database/database.inc:2171
Stack trace:
#0 /home/admin/web/monsite.pro/public_html/includes/database/database.inc(2171): PDOStatement->execute(Array)
#1 /home/admin/web/monsite.pro/public_html/includes/database/database.inc(683): DatabaseStatementBase->execute(Array, Array)
#2 /home/admin/web/monsite.pro/public_html/includes/database/database.inc(2350): DatabaseConnection->query('SELECT expire, ...', Array, Array)
#3 /home/admin/web/monsite.pro/public_html/includes/lock.inc(167): db_query('SELECT expire, ...', Array)
#4 /home/admin/web/monsite.pro/public_html/includes/lock.inc(146): lock_may_be_available('schema:runtime:...')
#5 /home/admin/web/monsite.pro/public_html/includes/bootstrap.inc(433): lock_acquire('schema:runtime:...')
#6 /home/admin/web/monsite.pro/public_html/includes/bootstrap.inc(455): DrupalCacheArray->set( in /home/admin/web/monsite.pro/public_html/includes/database/database.inc on line 2171

J'ai eu ce message en fin de drush, alors je ne sais pas si tout est ok dans la profondeur de Drupal. Pour l'instant j'arrive à surfer sur le site, je n'ai pas rencontré d'erreurs mais je ne peux pas me fier qu'à ce seul critère.

Aussi, je fais appel à votre aide.

Merci pour tout renseignement.