WARN Mount options of / OK - exceeding: barrier=1

try to make a reinventory (-II on shell) for the afffected hosts.
After restart cmk with -R

 

cmk -II

cmk -R


( ! ) Warning: count(): Parameter must be an array or an object that implements Countable in /var/www/vhosts/shan.info/httpdocs/templates/gk_publisher/html/com_k2/templates/default/item.php on line 169
Call Stack
#TimeMemoryFunctionLocation
10.0008414168{main}( ).../index.php:0
20.09344718784Joomla\CMS\Application\SiteApplication->execute( ).../index.php:49
30.09344718784Joomla\CMS\Application\SiteApplication->doExecute( ).../CMSApplication.php:196
40.349512446968Joomla\CMS\Application\SiteApplication->dispatch( ).../SiteApplication.php:233
50.350412471408Joomla\CMS\Component\ComponentHelper::renderComponent( ).../SiteApplication.php:194
60.351512526736Joomla\CMS\Component\ComponentHelper::executeComponent( ).../ComponentHelper.php:377
70.351812555560require_once( '/var/www/vhosts/shan.info/httpdocs/components/com_k2/k2.php' ).../ComponentHelper.php:402
80.362312990968K2ControllerItem->execute( ).../k2.php:64
90.362312990968K2ControllerItem->display( ).../BaseController.php:710
100.374613716168K2ControllerItem->display( ).../item.php:78
110.374613716168K2ControllerItem->display( ).../controller.php:19
120.380314112536Joomla\CMS\Cache\Controller\ViewController->get( ).../BaseController.php:663
130.382914132904K2ViewItem->display( ).../ViewController.php:102
140.477817093448K2ViewItem->display( ).../view.html.php:742
150.477817093448K2ViewItem->loadTemplate( ).../HtmlView.php:230
160.482117273648include( '/var/www/vhosts/shan.info/httpdocs/templates/gk_publisher/html/com_k2/templates/default/item.php' ).../HtmlView.php:701

( ! ) Notice: Only variables should be assigned by reference in /var/www/vhosts/shan.info/httpdocs/templates/gk_publisher/html/com_k2/templates/default/item.php on line 478
Call Stack
#TimeMemoryFunctionLocation
10.0008414168{main}( ).../index.php:0
20.09344718784Joomla\CMS\Application\SiteApplication->execute( ).../index.php:49
30.09344718784Joomla\CMS\Application\SiteApplication->doExecute( ).../CMSApplication.php:196
40.349512446968Joomla\CMS\Application\SiteApplication->dispatch( ).../SiteApplication.php:233
50.350412471408Joomla\CMS\Component\ComponentHelper::renderComponent( ).../SiteApplication.php:194
60.351512526736Joomla\CMS\Component\ComponentHelper::executeComponent( ).../ComponentHelper.php:377
70.351812555560require_once( '/var/www/vhosts/shan.info/httpdocs/components/com_k2/k2.php' ).../ComponentHelper.php:402
80.362312990968K2ControllerItem->execute( ).../k2.php:64
90.362312990968K2ControllerItem->display( ).../BaseController.php:710
100.374613716168K2ControllerItem->display( ).../item.php:78
110.374613716168K2ControllerItem->display( ).../controller.php:19
120.380314112536Joomla\CMS\Cache\Controller\ViewController->get( ).../BaseController.php:663
130.382914132904K2ViewItem->display( ).../ViewController.php:102
140.477817093448K2ViewItem->display( ).../view.html.php:742
150.477817093448K2ViewItem->loadTemplate( ).../HtmlView.php:230
160.482117273648include( '/var/www/vhosts/shan.info/httpdocs/templates/gk_publisher/html/com_k2/templates/default/item.php' ).../HtmlView.php:701
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