Note: This bug is displayed in read-only format because the product is no longer active in Red Hat Bugzilla.

Bug 1104670

Summary:	Incorrect migration progress reporting may lead to unwanted migration cancellation
Product:	[Retired] oVirt	Reporter:	Francesco Romani <fromani>
Component:	vdsm	Assignee:	Francesco Romani <fromani>
Status:	CLOSED CURRENTRELEASE	QA Contact:	Pavel Novotny <pnovotny>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	3.4	CC:	acathrow, bazulay, gklein, iheim, mavital, mgoldboi, yeylon
Target Milestone:	---
Target Release:	3.4.3
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	virt
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2014-07-18 09:32:14 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	1104073, 1114269

Description Francesco Romani 2014-06-04 13:28:49 UTC

Description of problem:
until http://gerrit.ovirt.org/#/c/27465/ , VDSM had a bug which caused incorrect migration progress to be reported. This is caused by migration slow to start for whatever reason; in this scenario VDSM will mistakely report libvirt data for 100% migration completed, but once real data is available,
the progress will jump back to lower values.

Besides the UI inconsistency, this may be misinterpreted for migration stalling, and may in turn cause unwanted migration cancellation.


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


How reproducible:
Not easy. Initial phase of migration must stall for whatever reason.


Steps to Reproduce:
1. Have migration start slowly, for example by having slow DNS
2. See migration mistakenly reported as 100% completed, than observe real progress value
3.

Actual results:
Actually depending on the interleave of the events, migration can be cancelled

Expected results:
correct progress, no unwanted cancelation

Additional info:
The scenario, although unlikely, is not hypotetical but observed in https://bugzilla.redhat.com/show_bug.cgi?id=1104073

Comment 1 Sandro Bonazzola 2014-07-18 09:32:14 UTC

This is an automated message

oVirt 3.4.3 has been released:
 * should fix your issue
 * should be available at your local mirror within two days.

If problems still persist, please make note of it in this bug report.