Nagios Support Forum

hi Team,
We have around 160 hosts and close to 800+ service configured on the nagios XI.
Recently we see most of the service state shows flapping, even though it is active in the server. Seems NRPE agent/nagios is not responding to the other client agents.
Do we need to do any Linux side settings ( for example nproc,ulimit etc for nagios/apache/mysql user)
our nagios is running as root user.
Please find the attached Profile.zip with this email.
thanks

Hello @nagios_ant,

Thank for uploading the system profile. Before making any changes, I would recommend making a backup or taking a snapshot of you're using a VM. After looking it over, you may have some issues with permission settings, so let's try to run the reset permissions script on the server:
Flapping is based on the last 21 states of the host or service, so if there was connectivity issue, try resetting the host by submitting a passive check:

Find the host object and click on it
Click the Advanced tab
Under Commands click Submit passive check result
Make sure the Check Result is UP
Type OK in the Check Output
Click the Commit button

Is the host in an up or down state?