Can't connect to local MySQL server through socket homebrew

Question

I recently tried installing MySQL with homebrew (brew install mysql) and when I try to run it I get the following error:

ERROR 2002 (HY00

Answer 1

If "mysqld" IS running, it's possible your data is corrupted. Try running this:

mysqld

Read through the wall of data, and check if mysqld is reporting that the database is corrupted. Corruption can present in many unintuitive ways:

• mysql -uroot returns "ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)".
• mysql.server start returns "ERROR! The server quit without updating PID".
• Sequel Pro and MySQL Workbench responds that they can't connect to MySQL on localhost or 127.0.0.1.

To recover your data, open my.cnf and add the following line in the [mysqld] section:

innodb_force_recovery=1

Restart mysqld:

$ brew services restart mysql@5.6

Now you can connect to it, but it’s in limited read-only mode.

If you're using InnoDB, run this to export all your data:

$ mysqldump -u root -p --all-databases --add-drop-database --add-drop-table > data-recovery.sql

The file is created in your ~ dir. It may take some time.

Once finished, remove innodb_force_recovery=1 from my.cnf, then restart mysql in normal mode:

$ brew services restart mysql@5.6

Drop all the databases. I did this using Sequel Pro. This deletes all your original data. Make sure your data-recovery.sql looks good before doing this. Also consider backing up /usr/local/var/mysql to be extra careful.

Then restore the databases, tables, and data with this:

$ mysql -uroot < ~/data-recovery.sql

This can be a long import/restoration process. Once complete, you’re good to go!

Thanks go to https://severalnines.com/database-blog/my-mysql-database-corrupted-what-do-i-do-now for the recovery instructions. The link has further instructions on MyISAM recovery.