Bug 908008

Summary:	virt-manager: Unable to migrate guest: End of file while reading data: : Input/output error
Product:	[openSUSE] openSUSE Tumbleweed	Reporter:	Martin Pluskal <mpluskal>
Component:	Basesystem	Assignee:	James Fehlig <jfehlig>
Status:	RESOLVED FIXED	QA Contact:	E-mail List <qa-bugs>
Severity:	Normal
Priority:	P5 - None	CC:	carnold, jdouglas, jfehlig, mpluskal
Version:	201412*
Target Milestone:	---
Hardware:	Other
OS:	Other
Whiteboard:
Found By:	---	Services Priority:
Business Priority:		Blocker:	---
Marketing QA Status:	---	IT Deployment:	---
Bug Depends on:	908007
Bug Blocks:
Attachments:	virt-manager --debug backtrace

Description Martin Pluskal 2014-12-02 15:03:08 UTC

Created attachment 615641 [details]
virt-manager --debug

+++ This bug was initially created as a clone of Bug #908007 +++

When trying to migrate vm via virt-manager (with option migrate via libvirtd) between machines with opensuse-factorty, following error is raised:

Unable to migrate guest: End of file while reading data: : Input/output error

Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/asyncjob.py", line 89, in cb_wrapper
    callback(asyncjob, *args, **kwargs)
  File "/usr/share/virt-manager/virtManager/migrate.py", line 547, in _async_migrate
    vm.migrate(dstconn, migrate_uri, rate, live, secure, unsafe, meter=meter)
  File "/usr/share/virt-manager/virtManager/domain.py", line 1446, in migrate
    self._backend.migrate(destconn, flags, newname, interface, rate)
  File "/usr/lib64/python2.7/site-packages/libvirt.py", line 1458, in migrate
    if ret is None:raise libvirtError('virDomainMigrate() failed', dom=self)
libvirtError: End of file while reading data: : Input/output error

Comment 1 Martin Pluskal 2014-12-02 15:57:02 UTC

Hmm, according to dmesg it seems that there is something going wrong with libvirt:
# dmesg
...
[ 8755.168038] libvirtd[29555]: segfault at 0 ip 00007f6b383b33d5 sp 00007f6b3dc5d7a0 error 4 in libvirt_driver_qemu.so (deleted)[7f6b38331000+113000]
[ 8841.069925] libvirtd[7378]: segfault at 0 ip 00007fabe529a3d5 sp 00007fabebb467a0 error 4 in libvirt_driver_qemu.so[7fabe5218000+113000]

Comment 2 Charles Arnold 2014-12-02 16:08:04 UTC

Jim,
Is this issue addressed with recent libvirt fixes for migration?

Comment 3 James Fehlig 2014-12-02 16:21:28 UTC

(In reply to Charles Arnold from comment #2)
> Jim,
> Is this issue addressed with recent libvirt fixes for migration?

Those fixes were for the Xen libxl driver, so wont improve the situation in this bug.

Martin, can you get a stack trace of the segfault?  Thanks!

Comment 4 Martin Pluskal 2014-12-02 18:21:39 UTC

Created attachment 615673 [details]
backtrace

I am not sure if this is relevant, but source machine is running 3.17.2 kernel and target 3.18-rc7, cpu of target is more recent than that of source.
I am also not sure if there might be some connection to bnc#907843 - target machine however does not have any issues with running kvm with most recent development kernels.

Comment 5 James Fehlig 2014-12-03 13:14:32 UTC

Thanks Martin, the backtrace was helpful.  Crash has already been fixed upstream

http://libvirt.org/git/?p=libvirt.git;a=commit;h=52691f99fa016ac46c9546c37706e57a5180d4c6

I've added the patch to the libvirt package in Virtualization and sent an SR to Factory - SR#263831.

Comment 6 Bernhard Wiedemann 2014-12-03 14:00:26 UTC

This is an autogenerated message for OBS integration:
This bug (908008) was mentioned in
https://build.opensuse.org/request/show/263831 Factory / libvirt

Comment 7 James Fehlig 2014-12-03 15:05:53 UTC

Closing now that #908007 is closed.