Messaggio di errore

• Warning: Error while sending QUERY packet. PID=758 in DatabaseStatementBase->execute() (linea 2227 di /var/www/design.rootiers.it/lab1/includes/database/database.inc).
• Warning: Cannot modify header information - headers already sent by (output started at /var/www/design.rootiers.it/lab1/includes/common.inc:2777) in drupal_send_headers() (linea 1486 di /var/www/design.rootiers.it/lab1/includes/bootstrap.inc).
• PDOException: SQLSTATE[HY000]: General error: 2006 MySQL server has gone away: SELECT 1 AS expression FROM {variable} variable WHERE ( (name = :db_condition_placeholder_0) ); Array ( [:db_condition_placeholder_0] => cron_last ) in variable_set() (linea 1245 di /var/www/design.rootiers.it/lab1/includes/bootstrap.inc).