Drupal 7. When editing the content type appears this error. Additional uncaught exception thrown while handling exception. Original PDOException: SQLSTATE[HY000]: General error: 2006 MySQL server has gone away: SELECT s.lid, t.translation, s.version FROM {locales_source} s LEFT JOIN {locales_target} t ON s.lid = t.lid AND t.language = :language WHERE s.source = :source AND s.context = :context AND s.textgroup = 'default'; Array ( [:language] => ru [:source] => Configure how content input by users is filtered, including allowed HTML tags. Also allows enabling of module-provided filters. [:context] => ) in locale() (line 720 of S:\home\go\www\modules\locale\locale.module). Additional PDOException: SQLSTATE[HY000]: General error: 2006 MySQL server has gone away: SELECT s.lid, t.translation, s.version FROM {locales_source} s LEFT JOIN {locales_target} t ON s.lid = t.lid AND t.language = :language WHERE s.source = :source AND s.context = :context AND s.textgroup = 'default'; Array ( [:language] => ru [:source] => A field which is not visible to the user, but is recorded with the submission. [:context] => ) in locale() (line 720 of S:\home\go\www\modules\locale\locale.module). Uncaught exception thrown in session handler. PDOException: SQLSTATE[HY000]: General error: 2006 MySQL server has gone away in _drupal_session_write() (line 209 of S:\home\go\www\includes\session.inc). I get this error for editing categories Original PDOException: SQLSTATE[HY000]: General error: 2006 MySQL server has gone away: SELECT * FROM {commerce_flat_rate_service}; Array ( ) in commerce_flat_rate_commerce_shipping_service_info() (line 120 of /Applications/MAMP/htdocs/kickstart2/profiles/commerce_kickstart/modules/contrib/commerce_flat_rate/commerce_flat_rate.module). ----- ou have a problem with your local MySQL configuration. To resolve that problem you need to increase max_allowed_packet variable in MySQL. The MySQL server of MAMP (not PRO) will be started without any my.cnf file. But you can create your own my.cnf file. Stop servers Create a "my.cnf" file in "/Applications/MAMP/conf/". Add your content in to "my.cnf" Save "my.cnf" Start servers You do not have to put a complete configuration in the my.cnf file. You can just add parts of a configuration ... for example: [mysqld] max_allowed_packet = 100M 200! Решило проблему на самарте при добавлении нового типа материала https://drupal.org/node/1787038 **Удалить кучу нод из обратной связи** Нужно изучить этот вопрос - могут быть зависимости node_delete https://drupal.org/project/views_bulk_operations https://drupal.org/project/improved_admin https://drupal.org/project/views_bulk_operations http://www.drupal.ru/node/46488 http://www.drupal.ru/node/45681 xandeadx.ru/blog/drupal/500 drupalace.ru/massovoe-udalenie-materiala