Mensaje de error

• Warning: Error while sending QUERY packet. PID=2735 en DatabaseStatementBase->execute() (línea 2227 de /homepages/12/d544180535/htdocs/includes/database/database.inc).
• Warning: Cannot modify header information - headers already sent by (output started at /homepages/12/d544180535/htdocs/includes/common.inc:2773) en drupal_send_headers() (línea 1481 de /homepages/12/d544180535/htdocs/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 ) en variable_set() (línea 1240 de /homepages/12/d544180535/htdocs/includes/bootstrap.inc).