FTP login by wordpress was error

I have problem when I try do update plugin in wordpress.

The message error is:

An error occurred while updating Akismet: Download failed. Destination directory for file streaming does not exist or is not writable.

My develop environment is Win 7 Pro 64bit.

My server is linux centos 7 (virtual machine).

My FTP server is vsftpd.

My wordpress folder is /var/www/html/myWP.

I try to find this error and try to fixed at descriptions.

I chowned -R apache:apache for /var/www/ and /var/www/html

My foldera permission are 755 and files are 644

I edit the wp-config.php following:

define( 'FS_METHOD',       'direct');

define( 'FTP_BASE',        '/myWP');

define( 'FTP_CONTENT_DIR', '/myWP/wp-content/');

define( 'FTP_PLUGIN_DIR',  '/myWP/wp-content/plugins/');

define( 'FTP_USER',        'tommy');

define( 'FTP_PASS',        '123456789');

define( 'FTP_HOST',        '192.168.1.100');

define( 'FTP_SSL', false);

I try to make tmp folder and path to it like:
define( 'WP_TEMP_DIR', ABSPATH . 'wp-content/tmp/') ;

I opened port 21 for firewall in centos7.

My question: This FTP account could login, transfer, edit or delete files by FileZilla client. It was OK BUT I still can’t update the plugins. Please check out for me my false.