Fatal trap 12: page fault while in kernel mode

[Waldo]

Hi!

I am using PFSense for about 6 months now as Firewall and Router for different wireless LANs. Works fine so far.
Here is my setup:
PFSense is installed in an virtual machine hosted on VMWare ESX 5.1. There are two ESX machines running in a cluster. PFSense is on a shared storage to make it HA.

PFSense itself is running Release 2.1.5 now. I think since the last update (but cannot say for sure) the machine stops from time to time with exact the same error. "Fatal trap12: page fault while in kernel mode"
Please see attachment for details.

I searched the forum and found several users having the same error. But all of them have it during bootup. No one has a problem like me.

Would be nice if someone could give me advice where to start searching. I have to say I am not that good at Linux, but willing to become so ;)
Is there a possibility to go back to a previous release just to assure it has to do something with the update?
I read about the "switch slice" button in the NanoBSD area. Is that what I need?

thx for your help in advance

[heper]

remove the virtual CD-drive… it has fixed this exact problem on a couple of my virtual boxes

it's a known issue for freebsd 8.x on esxi

[Waldo]

Hi heper,

many thanks for your reply!
Removed the cd-drive from VM settings. Will see if it crashes again.

[Waldo]

Hi again,

just want to let you know the result off removing the CD-drive. Seems to be the cause of the problem. PFSense is running stable since the change (about 2 weeks ago).
I'll let you know if it changes.

Many thx for your help, heper!!!

[heper]

that's what we are here for ;)