Too many open files and VM crash


Active Member
Feb 26, 2017
HP DL380P G8
CPU: E5-2650L x2
Memory: 384GB
PVE 8.0.4
ovs-vsctl (Open vSwitch) 3.1.0

So recently i have been running into an issue on one of my proxmox servers. From time to time when trying to modify a network adapter i will get an error saying the guest is not running and then the change shows as pending. The guest was running and somehow attempting to make a change to the adapter killed it. In this particular instance the disconnect checkbox was checked on the adapter and unchecking it caused the error. I see the following error from /var/log/syslog. Anyone have any recommendations to resolve this? I have included the config for the VM that had the issue today below, however i have had this issue on other VMs on the same host aswell.

2023-10-18T14:55:52.955149+00:00 mci-2 pvedaemon[2602455]: <root@pam> update VM 112: -net1 virtio=46:7D:F5:7A:AB:19,bridge=vmbr2,queues=20
2023-10-18T14:55:53.027983+00:00 mci-2 QEMU[2622764]: virtio_bus_set_host_notifier: unable to init event notifier: Too many open files (-24)
2023-10-18T14:55:53.028279+00:00 mci-2 QEMU[2622764]: vhost VQ 0 notifier binding failed: 24
2023-10-18T14:55:53.028448+00:00 mci-2 QEMU[2622764]: kvm: ../softmmu/memory.c:2608: memory_region_del_eventfd: Assertion `i != mr->ioeventfd_nb' failed.
2023-10-18T14:55:53.029409+00:00 mci-2 pvedaemon[2602455]: VM 112 qmp command failed - VM 112 qmp command 'set_link' failed - client closed connection
2023-10-18T14:55:53.029920+00:00 mci-2 pvedaemon[2602455]: VM 112 qmp command failed - VM 112 not running

bios: ovmf
boot: order=ide2;scsi0
cores: 10
cpu: host
efidisk0: Primary:vm-112-disk-0,efitype=4m,size=4M
ide2: none,media=cdrom
machine: q35
memory: 16384
meta: creation-qemu=7.2.0,ctime=1685055043
name: Router-1
net0: virtio=ba:af:e0:fd:e3:ca,bridge=vmbr0,link_down=1,queues=20
net1: virtio=46:7D:F5:7A:AB:19,bridge=vmbr2,queues=20
net2: virtio=D2:C0:0C:67:54:1D,bridge=vmbr3,queues=20
net3: virtio=56:26:E3:38:26:F2,bridge=vmbr5,queues=20
net4: virtio=22:93:52:0F:DE:00,bridge=vmbr4,link_down=1,queues=20,tag=816
numa: 0
onboot: 1
ostype: l26
scsi0: LDSAS:vm-112-disk-0,iothread=1,size=64G
scsihw: virtio-scsi-single
serial0: socket
smbios1: uuid=e43f6456-fc21-467d-9a88-0b15317f46e8
sockets: 2
vmgenid: 1ad6d9e9-5e86-4b6a-a2e3-f0f5727a9f46
Last edited:


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