Magento 2.0.7 XML sitemap is not generated by schedule

[dexterityzx]

Preconditions

1. Magento 2.0.7
2. Cron job is working. I've checked the cron_schedule table, but nothing like "sitemap" is in the table.

Steps to reproduce

1. go to admin>store>configurtion>catalog>xml sitemap
2. turn on generation and set up time.

Expected result

1. generate sitemap in magento root folder.

Actual result

no xml sitemap is found. Below is my settings.

1. Cron settings:

*/1 * * * * php /var/www/magento-demo1/bin/magento cron:run | grep -v "Ran jobs by schedule" >> /var/www/magento-demo1/var/log/magento.cron.log&
*/1 * * * * php /var/www/magento-demo1/update/cron.php >> /var/www/magento-demo1/var/log/update.cron.log&
*/1 * * * * php /var/www/magento-demo1/bin/magento setup:cron:run >> /var/www/magento-demo1/var/log/setup.cron.log&

1. Log: magento.cron.log and setup.cron.log are empty, and the update.cron.log shows Cron readiness check failed
2. cron_schedule table:
   

[magento-engcom-team]

@dexterityzx, thank you for your report.
We've created internal ticket(s) MAGETWO-80284 to track progress on the issue.