[PVE-User] Backup failure: 'query-backup' failed on a single node

[Yannis Milios]

Hello list,

I have a single node running a single vm (win2k3).
It was working fine on Proxmox 2.3.I upgraded this box to 3.1 last week by
following:
http://pve.proxmox.com/wiki/Upgrade_from_2.3_to_3.0.
All went smooth, except that backup is not completed for some reason.
I have a local nfs mount on a NAS device which I use as a backup target:

root at proxmox1:~# df -h
Filesystem                     Size  Used Avail Use% Mounted on
udev                            10M     0   10M   0% /dev
tmpfs                          194M  1.5M  192M   1% /run
/dev/mapper/pve-root            28G   16G   11G  60% /
tmpfs                          5.0M     0  5.0M   0% /run/lock
tmpfs                          387M   22M  366M   6% /run/shm
/dev/mapper/pve-data            65G  9.8G   55G  16% /var/lib/vz
/dev/sda1                      495M  123M  348M  27% /boot
/dev/fuse                       30M   16K   30M   1% /etc/pve
*192.168.0.203:/VOLUME1/PUBLIC  442G  198G  244G  45% /mnt/pve/nfs1*
*
*
The error I am receiving is:

*VM 101 qmp command 'query-backup' failed - client closed connection*
*
*
What I've noticed is that if even if I invoke a manual backup job, the
process starts but it takes forever and then stops with the above message.
During this time, if I ping the node I get very high response time and some
times it is near inaccessible.
I did a test to write a 100mb file at nfs mount:

*root at proxmox1:~# dd if=/dev/zero of=/mnt/pve/nfs1/test.raw bs=1M count=100*
*100+0 records in*
*100+0 records out*
*104857600 bytes (105 MB) copied, 340.931 s, 308 kB/s*
*
*
Seems that for some reason the machine has a hard time communicating with
NAS device.The strange thing is that before upgrade there was no problem.
Could it be a nic driver issue? I'm providing some more info if could
anyone help:


*root at proxmox1:~# pveversion -v*
*proxmox-ve-2.6.32: 3.1-109 (running kernel: 2.6.32-23-pve)*
*pve-manager: 3.1-3 (running version: 3.1-3/dc0e9b0e)*
*pve-kernel-2.6.32-20-pve: 2.6.32-100*
*pve-kernel-2.6.32-16-pve: 2.6.32-82*
*pve-kernel-2.6.32-17-pve: 2.6.32-83*
*pve-kernel-2.6.32-18-pve: 2.6.32-88*
*pve-kernel-2.6.32-23-pve: 2.6.32-109*
*lvm2: 2.02.98-pve4*
*clvm: 2.02.98-pve4*
*corosync-pve: 1.4.5-1*
*openais-pve: 1.1.4-3*
*libqb0: 0.11.1-2*
*redhat-cluster-pve: 3.2.0-2*
*resource-agents-pve: 3.9.2-4*
*fence-agents-pve: 4.0.0-1*
*pve-cluster: 3.0-7*
*qemu-server: 3.1-1*
*pve-firmware: 1.0-23*
*libpve-common-perl: 3.0-6*
*libpve-access-control: 3.0-6*
*libpve-storage-perl: 3.0-10*
*pve-libspice-server1: 0.12.4-1*
*vncterm: 1.1-4*
*vzctl: 4.0-1pve3*
*vzprocps: 2.0.11-2*
*vzquota: 3.1-2*
*pve-qemu-kvm: 1.4-17*
*ksm-control-daemon: 1.1-1*
*glusterfs-client: 3.4.0-2*


*root at proxmox1:~# tail /var/log/kern.log*
*Sep 16 02:35:11 proxmox1 kernel: r8169 0000:02:00.0: eth0: link up*
*Sep 16 10:18:47 proxmox1 kernel: r8169 0000:02:00.0: eth0: link up*
*Sep 16 10:19:35 proxmox1 kernel: r8169 0000:02:00.0: eth0: link up*
*Sep 16 10:20:05 proxmox1 kernel: r8169 0000:02:00.0: eth0: link up*
*Sep 16 10:20:35 proxmox1 kernel: r8169 0000:02:00.0: eth0: link up*
*Sep 16 10:20:59 proxmox1 kernel: r8169 0000:02:00.0: eth0: link up*
*Sep 16 10:21:41 proxmox1 kernel: r8169 0000:02:00.0: eth0: link up*
*Sep 16 10:22:05 proxmox1 kernel: r8169 0000:02:00.0: eth0: link up*
*Sep 16 10:22:41 proxmox1 kernel: r8169 0000:02:00.0: eth0: link up*
*Sep 16 10:23:11 proxmox1 kernel: r8169 0000:02:00.0: eth0: link up*
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