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Bug 1397122

Summary: Live merge fails with: Failed to live merge, still in volume chain
Product: Red Hat Enterprise Virtualization Manager Reporter: Javier Coscia <jcoscia>
Component: ovirt-engineAssignee: Ala Hino <ahino>
Status: CLOSED WORKSFORME QA Contact: Raz Tamir <ratamir>
Severity: high Docs Contact:
Priority: unspecified    
Version: 3.6.9CC: gklein, gwatson, jcoscia, lsurette, mavital, mkalinin, ratamir, rbalakri, Rhev-m-bugs, srevivo, tnisan, ykaul, ylavi
Target Milestone: ovirt-3.6.11   
Target Release: ---   
Hardware: x86_64   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: If docs needed, set a value
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Clone Of: Environment:
Last Closed: 2017-01-15 12:09:10 UTC Type: Bug
Regression: --- Mount Type: ---
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Verified Versions: Category: ---
oVirt Team: Storage RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Javier Coscia 2016-11-21 16:38:16 UTC 
Description of problem:

While trying to delete a snapshot, the live merge operation failed with "Failed to live merge, still in volume chain:"
No additional information shown in engine.log on why this failure

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

rhevm-3.6.9.2-0.1.el6

RHEV Hypervisor - 7.2 - 20160711.0.el7ev
vdsm-4.17.33-1.el7ev

How reproducible:

It seems to be random in customer's environment

Steps to Reproduce:
1. 
2.
3.

Actual results:

In this particular case the VM wasn't able to boot becuase the LEAF volume was marked as illegal

Expected results:

Live merge operation should succeed or engine.log should show why it failed

Additional info:
Comment 11 Raz Tamir 2016-12-08 14:23:34 UTC 
Right now we can't test live merge on 4.0.z or 4.1 because of 2 bugs:
https://bugzilla.redhat.com/show_bug.cgi?id=1400707
https://bugzilla.redhat.com/show_bug.cgi?id=1400137

I'm keeping the needinfo flag