1

I'm working on the Drupal 7 site that's currently on Dreamhost.

Since this morning, the site is showing the following error message:

Error
The website encountered an unexpected error. Please try again later.
Error message PDOException: SQLSTATE[42000]: Syntax error or access violation: 1286 Unknown table engine 'InnoDB': SELECT expire, value FROM {semaphore} WHERE name = :name; Array ( [:name] => variable_init ) in lock_may_be_available() (line 167 of /home/mysite.com/includes/lock.inc). Uncaught exception thrown in shutdown function.

PDOException: SQLSTATE[42000]: Syntax error or access violation: 1286 Unknown table engine 'InnoDB': DELETE FROM {semaphore} WHERE (value = :db_condition_placeholder_0) ; Array ( [:db_condition_placeholder_0] => 7584349655055df9b66b5c9.36234254 ) in lock_release_all() (line 269 of /home/mysite.com/includes/lock.inc).

Has anyone seen this sort of error before? Yesterday, my database showed as InnoDB in PHPMyAdmin; today there's nothing showing as "type."

Improve this question

1 Answer 1

Reset to default
1

On Debian 6, this can also happen when you change the innodb_log_file_size parameter. Sometimes mysql does not start; other times, it just starts up, but the InnoDB engine is not enabled. The solution is to remove ib_logfiles from /var/lib/mysql and restart mysql.

See this issue in drupal.org.

Improve this answer
1
  • 1
    More generally, it happens when InnoDB fails to start, which can be the log file size thing or borked data, check your mysql log.
    – Berdir
    Commented Sep 17, 2012 at 7:33

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.