VM Centos looses connection to its HDD Drive in ZFS Proxmox 4

[bitblue.lab]

I have a node in Promox 4 with ZFS 2x2 TB Drives mirrored with a SSD 40GB ZIL and SSD for cache read 150GB

Sometimes when node has a lot of writes/reads the VM-s that have linux distro they loose connection with HDD drive ( show errors like buffer write/read failure etc ) become unstable can't reboot them with SSH reboot and use high cpu. The only fix is to go in promox and stop and start them.

Has anyone such case like me or any solution ?

 

[wolfgang]

Hi,
can you please post the output of

pveversion -v

 

[bitblue.lab]

proxmox-ve: 4.0-21 (running kernel: 4.2.3-2-pve)
pve-manager: 4.0-57 (running version: 4.0-57/cc7c2b53)
pve-kernel-4.2.2-1-pve: 4.2.2-16
pve-kernel-4.2.3-2-pve: 4.2.3-21
lvm2: 2.02.116-pve1
corosync-pve: 2.3.5-1
libqb0: 0.17.2-1
pve-cluster: 4.0-24
qemu-server: 4.0-35
pve-firmware: 1.1-7
libpve-common-perl: 4.0-36
libpve-access-control: 4.0-9
libpve-storage-perl: 4.0-29
pve-libspice-server1: 0.12.5-2
vncterm: 1.2-1
pve-qemu-kvm: 2.4-12
pve-container: 1.0-21
pve-firewall: 2.0-13
pve-ha-manager: 1.0-13
ksm-control-daemon: 1.2-1
glusterfs-client: 3.5.2-2+deb8u1
lxc-pve: 1.1.4-3
lxcfs: 0.10-pve2
cgmanager: 0.39-pve1
criu: 1.6.0-1
zfsutils: 0.6.5-pve6~jessie

Hi,
can you please post the output of

pveversion -v

 

[bitblue.lab]

As you see I get such problems with FLUSH CACHE ( this is a VM what shows when it gets blocked-stucked