[ovirt-users] ERROR 'no free file handlers in pool' while creating VM from template

[Donny Davis]

What is the VM load you are running on your servers?

-----Original Message-----
From: users-bounces at ovirt.org [mailto:users-bounces at ovirt.org] On Behalf Of Tiemen Ruiten
Sent: Tuesday, December 16, 2014 12:27 PM
To: users at ovirt.org
Subject: [ovirt-users] ERROR 'no free file handlers in pool' while creating VM from template

Hello,

I ran into a nasty problem today when creating a new, cloned VM from a template (one virtual 20 GBdisk) on our two-node oVirt cluster: on the node where I started a VM creation job, load skyrocketed and some VMs stopped responding until and after the job failed. Everything recovered without intervention, but this obviously shouldn't happen. I have attached the relevant vdsm log file. The button to create the VM was pressed around 11:17, the first error in the vdsm log is at 11:23:58.

The ISO domain is a gluster volume exposed via NFS, the storage domain for the VM's is also a gluster volume. The underlying filesystem is ZFS.
The hypervisor nodes are full CentOS 6 installs.

I'm guessing the 'no free file handlers in pool' in the vdsm log file is key here. What can I do to prevent this from happening again? Apart from not creating new VMs of course :)

Tiemen