Symfony3 - SQLSTATE[HY000] [2002] No such file or directory

Question

I am new to Symfony and started doing some tutorials in order to get some things done. I am working on a Linux Mint 18 machine and a standard Symfony3-project.

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Answer 1

May be It's too late but I had the same issue "SQLSTATE[HY000] [2002] No such file or directory" on my symfony 3.2.9 deployment

I fixed it by changing the database_host value from "localhost" to my server IP on my parameters.yml file

but I had this another error message when trying to run commandline by SSH:

[Doctrine\DBAL\Exception\ConnectionException]
 An exception occured in driver: SQLSTATE[HY000] [2002] Connection refused

I finaly fix it by adding these 2 lines on my config.yml file in Doctrine configuration section :

unix_socket: /var/lib/mysql/mysql.sock
server_version: '5.5'

all my final doctrine configuration is like this:

doctrine:
    dbal:
        driver: pdo_mysql
        host: '%database_host%'
        port: '%database_port%'
        dbname: '%database_name%'
        user: '%database_user%'
        password: '%database_password%'
        unix_socket: /var/lib/mysql/mysql.sock
        server_version: '5.5'
        charset: UTF8

hopefully this helps someone