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Error 'MySQL server has gone away' during installation


During installation, the following message displays:

MySQL server has gone away


Set the value of table_open_cache to a value of at least 250 as follows:

  1. As a user with root privileges, open the MySQL configuration file in a text editor.

    Ubuntu 16: /etc/mysql/mysql.conf.d/mysqld.cnf

    Ubuntu earlier than 16: /etc/mysql/my.cnf

    CentOS: /etc/my.cnf

  2. Search for an existing table_open_cache setting. If there is none, add one.

  3. Set the value to at least 250:

  4. Save your changes to my.cnf and exit the text editor.

  5. As a user with root privileges, restart the MySQL service:

    Ubuntu: service mysql restart

    CentOS: service mysqld restart