Hi,

I am currently running an API written in Grape using Puma. However, 
occasionally when I query the API I get the following error: "Mysql2::Error: 
MySQL server has gone away"

If i refresh the page it works as expected. My database.yml file is:

production: adapter: mysql2 database: test_db host: localhost user: user 
password: pass development: adapter: mysql2 database: test_db_dev host: 
localhost user: user password: pass

What causes this issue and how can I fix it? I am connecting like so:

config = YAML::load_file("config/database.yml")[ENV['RACK_ENV']]
DB = 
Sequel.connect("#{config['adapter']}://#{config['host']}/#{config['database']}",
 
user: "#{config['user']}", password: "#{config['password']}")

Thanks

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