RHEL Engineering is moving the tracking of its product development work on RHEL 6 through RHEL 9 to Red Hat Jira (issues.redhat.com). If you're a Red Hat customer, please continue to file support cases via the Red Hat customer portal. If you're not, please head to the "RHEL project" in Red Hat Jira and file new tickets here. Individual Bugzilla bugs in the statuses "NEW", "ASSIGNED", and "POST" are being migrated throughout September 2023. Bugs of Red Hat partners with an assigned Engineering Partner Manager (EPM) are migrated in late September as per pre-agreed dates. Bugs against components "kernel", "kernel-rt", and "kpatch" are only migrated if still in "NEW" or "ASSIGNED". If you cannot log in to RH Jira, please consult article #7032570. That failing, please send an e-mail to the RH Jira admins at rh-issues@redhat.com to troubleshoot your issue as a user management inquiry. The email creates a ServiceNow ticket with Red Hat. Individual Bugzilla bugs that are migrated will be moved to status "CLOSED", resolution "MIGRATED", and set with "MigratedToJIRA" in "Keywords". The link to the successor Jira issue will be found under "Links", have a little "two-footprint" icon next to it, and direct you to the "RHEL project" in Red Hat Jira (issue links are of type "https://issues.redhat.com/browse/RHEL-XXXX", where "X" is a digit). This same link will be available in a blue banner at the top of the page informing you that that bug has been migrated.
Bug 879132 - create external checkpoint sometimes will crash libvirtd
Summary: create external checkpoint sometimes will crash libvirtd
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: libvirt
Version: 6.4
Hardware: x86_64
OS: Linux
high
high
Target Milestone: rc
: ---
Assignee: Peter Krempa
QA Contact: Virtualization Bugs
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2012-11-22 06:45 UTC by Huang Wenlong
Modified: 2013-10-20 21:45 UTC (History)
8 users (show)

Fixed In Version: libvirt-0.10.2-10.el6
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2013-02-21 07:27:27 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)
libvirtd log (16.88 KB, application/x-xz)
2012-11-22 06:45 UTC, Huang Wenlong 		no flags Details
View All


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2013:0276 0 normal SHIPPED_LIVE Moderate: libvirt security, bug fix, and enhancement update 2013-02-20 21:18:26 UTC

Description Huang Wenlong 2012-11-22 06:45:14 UTC 
Created attachment 649544 [details]
libvirtd log

Description of problem:
create external checkpoint sometimes will crash libvirtd

Version-Release number of selected component (if applicable):
libvirt-0.10.2-9.el6.x86_64

How reproducible:
1/10

Steps to Reproduce:


1. start a domain name v9 with qcow2 img
# virsh list
Id Name State
----------------------------------------------------
1 guest running
12 v9 running


2.#for i in `seq 10 100` ;do virsh snapshot-create-as v9 v$i
--diskspec=hda --memspec=/tmp/v2 ;virsh snapshot-delete v9 v$i;done
Domain snapshot v10 created
Domain snapshot v10 deleted

Domain snapshot v11 created
Domain snapshot v11 deleted
....

3.libvirtd crash with error:

error: End of file while reading data: Input/output error
error: Failed to reconnect to the hypervisor

error: Failed to reconnect to the hypervisor


Actual results:
as steps

Expected results:
libvirtd do not crash

Additional info:
attach the libvirtd log
Comment 2 Peter Krempa 2012-11-22 10:23:17 UTC 
Hm, the output looks strange. Deletion of external snapshots isn't supported yet:

The output of upstream version looks like:
Domain snapshot v79 created
error: Failed to delete snapshot v79
error: unsupported configuration: deletion of 1 external disk snapshots not supported yet

RHEL is missing upstream commit:

commit 30f1bccf332c93aa646c6d5a69f1287a5d170983
Author: Peter Krempa <pkrempa>
Date:   Fri Oct 19 11:55:36 2012 +0200

    snapshot: qemu: Fix detection of external snapshots when deleting
    
    This patch adds a helper to determine if snapshots are external and uses
    the helper to fix detection of those in snapshot deletion code.
    
    Snapshots are external if they have an external memory image or if the
    disk locations are external. As mixed snapshots are forbidden for now
    we need to check just one disk to know.

This patch is backported as part of fix for https://bugzilla.redhat.com/show_bug.cgi?id=876817.

I will investigate further what's causing the crash but the problem cannot be reproduced on the upstream version and should not be reproducible after a build containing bz876817 is available.
Comment 5 Peter Krempa 2012-12-06 18:51:00 UTC 
As deletion of external checkpoints isn't yet supported by libvirt and the support was now properly disabled ( https://bugzilla.redhat.com/show_bug.cgi?id=876816 ) I'm setting this as test-only (to test if creation of snapshots in a loop is working okay) and moving to ON_QA.
Comment 6 Huang Wenlong 2012-12-07 03:13:55 UTC 
Verify this bug :
libvirt-0.10.2-11.el6.x86_64

can not delete external checkpoints snapshot see bug :
https://bugzilla.redhat.com/show_bug.cgi?id=876816


#for i in `seq 10 100` ;do virsh snapshot-create-as v9 v$i
--diskspec=hda --memspec=/tmp/v2 ;virsh snapshot-delete v9 v$i;done

Domain snapshot v10 created
error: Failed to delete snapshot v10
error: unsupported configuration: deletion of 1 external disk snapshots not supported yet

Domain snapshot v11 created
error: Failed to delete snapshot v11
error: unsupported configuration: deletion of 1 external disk snapshots not supported yet
...
Domain snapshot v100 created
error: Failed to delete snapshot v100
error: unsupported configuration: deletion of 1 external disk snapshots not supported yet

#
# service libvirtd status
libvirtd (pid  7765) is running...
Comment 9 errata-xmlrpc 2013-02-21 07:27:27 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHSA-2013-0276.html
Note You need to log in before you can comment on or make changes to this bug.