Additional uncaught exception thrown while handling exception.

Original

PDOException: SQLSTATE[HY000] [2013] Lost connection to MySQL server at 'reading initial communication packet', system error: 0 in drupal_is_denied() (line 1917 of /opt/instancias/pro-webctic/drupal-7.38/includes/bootstrap.inc).

Additional

PDOException: SQLSTATE[HY000] [2013] Lost connection to MySQL server at 'reading initial communication packet', system error: 0 in dblog_watchdog() (line 147 of /opt/instancias/pro-webctic/drupal-7.38/modules/dblog/dblog.module).