Zombie/Defunct process issue generated post OS upgrade of distributed pollers from Centos 7.9 to RHEL 8.9

[Vatansha]

hi All,

Can anyone assist here as i know 4 environments including mine getting affected with defunct process post OS upgrade and it doesn’t constrict to any particular OS. My servers run on RHEL 8.9 and others run on Ubuntu majorly. @ItsmeTelemetry @mattias.agar do you guys use Dispatcher service or use the cron job for distributed pollers? as in my case i have the librenms service running on all my 15 pollers and i am not using the cronjob.

Also you can go through below article from other environment. May be that helps you.

Zombie Process Issues

Hello, I need some help with debugging a zombie process issue with my LibreNMS install. Everything was setup using the install docs. I run the dispatcher service and rrdcached. Using 5 minute polling for approximately 60 devices with plans to add more. On Monthly update cycle for stability reasons. Also integrated with smokeping. Currently I am showing 18 zombie processes under the librenms user. They go away when I restart the librenms service only to reappear after a few hours it seems. …

Regards
Vatansha