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Created attachment 1097641 [details]
engine, libvirt, vdsm, qemu logs

Description of problem:
When you try to plug/unplug NIC on VM or add additional vNIC the VM goes down as a connection to qemu process is lost

Version-Release number of selected component (if applicable):


How reproducible:
Takes a bit of time, but if you plug/unplug existing vNIC or add, remove vNIC from VM the VM goes down

Steps to Reproduce:
1. Add vNIC to VM
2. Unplug existing vNIC
3. Plug vNIC back
4 Go over above steps several times

Actual results:
VM goes down with error message: Lost connection with qemu process

Expected results:
VM should be up and running

Additional info:

what is the guest OS? Is it running?

I didn't see guest side logs but the scenario matches bug 1270717

(In reply to Michal Skrivanek from comment #3)
> I didn't see guest side logs but the scenario matches bug 1270717

The RHEL 7.2.z bugzilla is: bug 1279793

Fixed in: kernel-3.10.0-327.2.1.el7

VM is RHEL 7.2 and VM is up when doing actions of add NIC, plug/unplug.
This is the bz - when you do those action VM crashes and goes down

This is almost certainly the same as bug 1270717 / bug 1279793.  Please retry with kernel-3.10.0-327.2.1.el7.  Note that this bug can cause crashes in either host or guest, so you'll want to update the kernel in both.

This bug do not happen with these new versions on host:

kernel 3.10.0-327.2.1.el7.ppc64le (also on guest)
and libvirt-1.2.17-13.el7_2.2.ppc64le
qemu-2.3.0-31.el7_2.3.ppc64le

thanks for confirmation, I'm closing it then as a duplicate of 1270717

*** This bug has been marked as a duplicate of bug 1270717 ***