How to repair `information_schema`.`TABLES`?

Question

I'm trying to list the contents of information_schema.TABLES like this:

SELECT * FROM information_schema.`TABLES` LIMIT 10

but it gives me an error:

ERROR 2013 (HY000): Lost connection to MySQL server during query

Then I tought that REPAIR TABLE TABLES should fix it, but it gave me:

ERROR 2006 (HY000): MySQL server has gone away
No connection. Trying to reconnect...
Connection id:    396
Current database: information_schema

ERROR 1044 (42000): Access denied for user 'root'@'localhost' to database 'information_schema'

Anyone had that problem before or have an idea what could I do to fix this ?

Answer 1

There were two entries (after restarting the server) in the error.log like this:

InnoDB: Unable to find the AUTOINC column role_id in the InnoDB table database/table.

after dropping both tables everything was working fine.

Answer 2

Take a look at your my.conf file and see if raising the following values fixes this issue for you.

interactive_timeout
wait_timeout

Answer 3

I would recommend you to try and fix your users table at MySQL using Grant. Usually when I had privileges access problems, this is how I solved them. Also, please take a look at the following bug -