Bug 670727

Summary:	qemu discard the errors for migration failing.
Product:	Red Hat Enterprise Linux 6	Reporter:	Osier Yang <jyang>
Component:	qemu-kvm	Assignee:	Juan Quintela <quintela>
Status:	CLOSED DUPLICATE	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	high	Docs Contact:
Priority:	urgent
Version:	6.1	CC:	armbru, dallan, gcosta, juzhang, jyang, lihuang, mkenneth, tburke, virt-maint
Target Milestone:	rc	Keywords:	Triaged
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:
Clones:	698496 (view as bug list)		Environment:
Last Closed:	2011-07-28 14:52:24 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Bug Depends On:
Bug Blocks:	580954, 615941, 619846, 688804, 696948, 698141, 698496

Description Osier Yang 2011-01-19 05:28:06 UTC

Description of problem:
libvirts use 3 URIs for migration:

1) source libvirtd URI
2) destination libvirtd URI
3) destination QEMU URI.

And if the destination QEMU URI is not specified by user, libvirt will try to execute "hostname()" on destination host to guess the hostname, and uses it to
form QEMU URI, (e.g. tcp://10.66.70.98).

So, If destination host is mis-configured, it will return a illed hostname which would not be able to address by source host, as a result, the migration will fail.

The problem here is that qemu discard the errors for migration failing (actually all of the errors related to getaddrinfo(3)/connect(2) failing?), so, libvirt can not get the exact error information for dignose log, an error like "An undefined error has occured" obviously is not what the user want to see. 

To get more info, see:
http://post-office.corp.redhat.com/mailman/private/virt-devel/2011-January/msg00239.html

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


How reproducible:


Steps to Reproduce:
1.
2.
3.
  
Actual results:


Expected results:


Additional info:

Comment 2 Osier Yang 2011-01-25 11:51:05 UTC

another bug blocked by this problem: https://bugzilla.redhat.com/show_bug.cgi?id=619846

Comment 5 Dave Allan 2011-06-03 16:13:00 UTC

Thanks, Juan.

Comment 6 juzhang 2011-06-14 11:41:12 UTC

Hi,Juan/Osier

    would you please tell me is this issue duplicate Bug 584077 - QMP: Improve migrate command error info? seems bz584077 is key reason, libvirt call qmp.

Comment 7 Markus Armbruster 2011-07-28 14:52:24 UTC

Yes, this is the same as bug 584077.

*** This bug has been marked as a duplicate of bug 584077 ***