Bug 1395681

Hello Lenovo,
Please attach a sosreport directly after seeing this issue.

Please also confirm if you have been able to recreate this issue on another physical system.

Thank You
Joe Kachuck

Created attachment 1221439 [details]
sosreport

Current we only found this issue happened with Haswell Denlow platform, here is cpuinfo, if any others needs to be uploaded for this case, please let me know it.

Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                8
On-line CPU(s) list:   0-7
Thread(s) per core:    2
Core(s) per socket:    4
Socket(s):             1
NUMA node(s):          1
Vendor ID:             GenuineIntel
CPU family:            6
Model:                 60
Model name:            Intel(R) Xeon(R) CPU E3-1270 v3 @ 3.50GHz
Stepping:              3
CPU MHz:               3759.082
BogoMIPS:              6983.78
Virtualization:        VT-x
L1d cache:             32K
L1i cache:             32K
L2 cache:              256K
L3 cache:              8192K
NUMA node0 CPU(s):     0-7

Hello,
It appears this may be a known error:
End of file while reading data: nc: using stream socket: Input/output error

If you specified 'ssh' transport, the daemon is probably not running on the server. 
If you start ssh service on your server. Does this error go away?

Thank You
Joe Kachuck

(In reply to Joseph Kachuck from comment #4)
> Hello,
> It appears this may be a known error:
> End of file while reading data: nc: using stream socket: Input/output error
> 
> If you specified 'ssh' transport, the daemon is probably not running on the
> server. 
> If you start ssh service on your server. Does this error go away?
> 
> Thank You
> Joe Kachuck

Hi Joe,

Thanks for your quick response. I am not sure what the meaning of "start ssh service on your server". In general we often use ssh client to connect the test server, do you mean I should open a terminal on the test server locally and have a look the error message is gone or not?

Hello,
I believe this is a libvert issue. Please confirm if the host and guest are running sshd service. This may remove this issue. If not engineering will need to respond.

Thank You
Joe Kachuck

These message are not on their own an example of any serious problem. In fact you'd pretty much expect to see these messages in many normal circumstances. So if anything, libvirt probably just wants to figure out a way of downgrading them to a lower severity level log message, though that it rather difficult due to the way libvirt feeds its errors in to the logging system.

Anyway to anyone seeing these, you can safely ignore them, unless you have other known functional problems with libvirt occurring at the same time.

Actually we haven't turned on any virtualization stuff on purpose. But it is okay for us since this defect isn't caused by Lenovo's product design.
If we could find any problems about libvirt in the future, we will report that to your side. For this issue, you could close it right now. 
And really thanks for your quick response.

The reproduce steps are:

0. Install libvirt-2.0.0-10.el7.x86_64

1. Start a guest
   # virsh start avocado-vt-vm1

2. Check /var/log/messages
...
Nov 18 13:57:26 localhost systemd: Starting Virtual Machine qemu-2-avocado-vt-vm1.
Nov 18 13:57:26 localhost kvm: 1 guest now active
Nov 18 13:57:26 localhost journal: End of file while reading data: Input/output error
...

3. The log messages come from virtlogd apparently:

# systemctl status virtlogd
● virtlogd.service - Virtual machine log manager
   Loaded: loaded (/usr/lib/systemd/system/virtlogd.service; indirect; vendor preset: disabled)
   Active: active (running) since Fri 2016-11-18 14:03:10 CST; 14s ago
     Docs: man:virtlogd(8)
           http://libvirt.org
 Main PID: 14334 (virtlogd)
   CGroup: /system.slice/virtlogd.service
           └─14334 /usr/sbin/virtlogd

Nov 18 14:03:10 localhost.localdomain systemd[1]: Started Virtual machine log manager.
Nov 18 14:03:10 localhost.localdomain systemd[1]: Starting Virtual machine log manager...
Nov 18 14:03:19 localhost.localdomain virtlogd[14334]: libvirt version: 2.0.0, package: 10.el7 (Red Hat, Inc. <http://bugzilla.redhat.com/bugzilla>, 2016...hat.com)
Nov 18 14:03:19 localhost.localdomain virtlogd[14334]: hostname: localhost.localdomain
Nov 18 14:03:19 localhost.localdomain virtlogd[14334]: End of file while reading data: Input/output error
Hint: Some lines were ellipsized, use -l to show in full.

Closing per comment 8.