Bug 1104670 - Incorrect migration progress reporting may lead to unwanted migration cancellation
Summary: Incorrect migration progress reporting may lead to unwanted migration cancell...
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: oVirt
Classification: Retired
Component: vdsm
Version: 3.4
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
: 3.4.3
Assignee: Francesco Romani
QA Contact: Pavel Novotny
URL:
Whiteboard: virt
Depends On:
Blocks: 1104073 1114269
TreeView+ depends on / blocked
 
Reported: 2014-06-04 13:28 UTC by Francesco Romani
Modified: 2014-07-18 09:32 UTC (History)
7 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2014-07-18 09:32:14 UTC
oVirt Team: ---
Embargoed:


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Links
System ID Private Priority Status Summary Last Updated
oVirt gerrit 28363 0 ovirt-3.4 MERGED vm: fix odd migration progress reporting Never

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.


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