Firewall GUI is not responsive while working time to time

[nsm]

Hi All,

I am having some strange issue. Set up is a Hub and Spoke SD-WAN network and 120G cluster work as the hub 100F and 60F nodes are the spokes. Only 3 spokes have.(2x100F,1x60F).All the firewall OS version is 7.2.11

While working on the firewalls, not every time but can not say an exact time the GUI is going unresponsive. All the GUI getting freeze and when refresh, URL is searching on a white page.After sometime it got normal again.This issue not only happens when accessing the firewall from the public IP but the LAN IP too.This is not specify to one firewall. All the ones gave this issue time to time.

But during this time period i can access the firewall by SSH and no traffic interruption. Firewall works fine without any complain. No RAM or CPU peaks even. TAC said even debug https also could not find any issue.A custom port is used for https and that port also open for the firewall accessing IP during the issue time.

In the OS release note also i could not find this kind of issue as a known issue.Any idea from you sorting out this issue? 

[esalija]

Dear @nsm ,

It is possible to use 'grep' to find the list of PIDs for certain processes:

# diagnose sys top | grep httpsd

Best regards,

Erlin

[filiaks1]

Also see How to check when the crash log is full - Fortinet Community if there are crash logs as maybe "diagnose debug application httpd -1" and "diagnose debug enable" as even if CPU/memory are ok maybe there is a crash and after the process is up then all is fine.

Also do the same for httpsd and check Known issues | FortiGate / FortiOS 7.2.11 | Fortinet Document Library if there is any note about the issue.