Issue Unable to set php_value 'pm'

[Hassaan]

I am seeing the following error for all of my domain in logs from last two days.

This command display following errors.

tail /var/log/plesk-php70-fpm/error.log

[16-May-2017 20:51:59] WARNING: [pool playsongs.pk] child 28347 said into stderr: "ERROR: Unable to set php_value 'pm'"
[16-May-2017 20:51:59] WARNING: [pool playsongs.pk] child 28347 said into stderr: "ERROR: Unable to set php_value 'pm.process_idle_timeout'"
[16-May-2017 20:51:59] WARNING: [pool playsongs.pk] child 28347 said into stderr: "ERROR: Unable to set php_value 'pm.max_children'"
[16-May-2017 20:51:59] WARNING: [pool playsongs.pk] child 28347 said into stderr: "ERROR: Unable to set php_value 'listen.backlog'"


I have followed this article. But solution is not working for me anymore

How to change PHP-FPM pool settings for domain through Plesk UI?


I have write the following lines to file /var/www/vhosts/system/playsongs.pk/conf/php.ini

listen.backlog = 65535

;[php-fpm-pool-settings]
pm = ondemand
pm.max_children = 4000
pm.process_idle_timeout = 10s


and then run following command

/usr/local/psa/bin/php_settings -u

But issue is still there