[PVE-User] pve-kernel-4.4.8-1-pve upgrade hanging

[Antoine Jacques de Dixmude]

Hello everyone,

Previously, this morning, I runned a "apt-get dist-upgrade" and I've got 
this output :

Reading package lists... Done
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
The following NEW packages will be installed:
   pve-docs pve-kernel-4.4.8-1-pve
The following packages will be upgraded:
   libexpat1 proxmox-ve pve-manager
3 upgraded, 2 newly installed, 0 to remove and 0 not upgraded.
Need to get 50.0 MB of archives.
After this operation, 5,804 kB of additional disk space will be used.
Do you want to continue? [Y/n] Y
Get:1 http://security.debian.org/ jessie/updates/main libexpat1 amd64 
2.1.0-6+deb8u3 [80.0 kB]
Get:2 https://enterprise.proxmox.com/debian/ jessie/pve-enterprise 
pve-kernel-4.4.8-1-pve amd64 4.4.8-52 [43.9 MB]
Get:3 https://enterprise.proxmox.com/debian/ jessie/pve-enterprise 
pve-docs all 4.2-5 [926 kB]
Get:4 https://enterprise.proxmox.com/debian/ jessie/pve-enterprise 
pve-manager amd64 4.2-11 [5,024 kB]
Get:5 https://enterprise.proxmox.com/debian/ jessie/pve-enterprise 
proxmox-ve all 4.2-52 [4,736 B]
Fetched 50.0 MB in 1s (34.6 MB/s)
Reading changelogs... Done
Preconfiguring packages ...
(Reading database ... 50086 files and directories currently installed.)
Preparing to unpack .../libexpat1_2.1.0-6+deb8u3_amd64.deb ...
Unpacking libexpat1:amd64 (2.1.0-6+deb8u3) over (2.1.0-6+deb8u2) ...
Selecting previously unselected package pve-kernel-4.4.8-1-pve.
Preparing to unpack .../pve-kernel-4.4.8-1-pve_4.4.8-52_amd64.deb ...
Unpacking pve-kernel-4.4.8-1-pve (4.4.8-52) ...
E: Sub-process /usr/bin/dpkg exited unexpectedly

So, I retried :
# apt-get dist-upgrade
E: dpkg was interrupted, you must manually run 'dpkg --configure -a' to 
correct the problem.

I followed the instruction got from the previous output:
# dpkg --configure -a
Setting up libexpat1:amd64 (2.1.0-6+deb8u3) ...
Processing triggers for libc-bin (2.19-18+deb8u4) ...

I've runned a third dist-upgrade and got the following output :
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
The following NEW packages will be installed:
   pve-docs
The following packages will be upgraded:
   proxmox-ve pve-kernel-4.4.8-1-pve pve-manager
3 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
1 not fully installed or removed.
Need to get 0 B/49.9 MB of archives.
After this operation, 5,803 kB of additional disk space will be used.
Do you want to continue? [Y/n] Y
Reading changelogs... Done
Preconfiguring packages ...
(Reading database ... 50086 files and directories currently installed.)
Preparing to unpack .../pve-kernel-4.4.8-1-pve_4.4.8-52_amd64.deb ...
Unpacking pve-kernel-4.4.8-1-pve (4.4.8-52) over (4.4.8-52) ...

I'm stuck with the "Unpacking pve-kernel-4.4.8-1-pve (4.4.8-52) over 
(4.4.8-52) ..." since 2 hours. And, as you can see, dpkg is unpacking 
the package on the same version ((4.4.8-52) over (4.4.8-52)).

Any idea ? (knowing that the upgrading node is also running some VMs)