doctrine:database:create return ConnectionException and MysqliException

Question

command php app/console doctrine:database:create

return errors:

[Doctrine\DBAL\Exception\ConnectionException]
An exception occured in driver: No such file or directory

[Doctrine\DBAL\Driver\Mysqli\MysqliException]
No such file or directory

doctrine:database:create [--connection[="..."]] [--if-not-exists]

app/config/parameters.yml

parameters:
    database_driver: mysqli
    database_host: localhost
    database_port: 9998
    database_name: testing
    database_user: root
    database_password: root
    mailer_transport: smtp
    mailer_host: 127.0.0.1
    mailer_user: null
    mailer_password: null
    locale: en
    secret: ThisTokenIsNotSoSecretChangeIt

but this parameters is correctly ps: I am used mamp pro.