Note: This bug is displayed in read-only format because the product is no longer active in Red Hat Bugzilla.
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 677739

Summary: removing final exclusive cmirror snapshot, results in clvmd deadlock
Product: Red Hat Enterprise Linux 6 Reporter: Corey Marthaler <cmarthal>
Component: lvm2Assignee: Jonathan Earl Brassow <jbrassow>
Status: CLOSED ERRATA QA Contact: Corey Marthaler <cmarthal>
Severity: high Docs Contact:
Priority: high    
Version: 6.1CC: agk, dwysocha, heinzm, jbrassow, mbroz, prajnoha, prockai, thornber, zkabelac
Target Milestone: rc   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: lvm2-2.02.83-3.el6 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2011-05-19 14:27:22 UTC Type: ---
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: 527186    

Description Corey Marthaler 2011-02-15 17:45:17 UTC 
Description of problem:

This issue is already described in:
https://bugzilla.redhat.com/show_bug.cgi?id=676909#c5.

[root@taft-01 ~]# lvs -a -o +devices
  LV                        VG        Attr   LSize   Log                 Copy%  Devices
  cmirror-origin            taft      mwi-a- 100.00m cmirror-origin_mlog 100.00 cmirror-origin_mimage_0(0),cmirror-origin_mimage_1(0)
  [cmirror-origin_mimage_0] taft      iwi-ao 100.00m                            /dev/sdb1(0)
  [cmirror-origin_mimage_1] taft      iwi-ao 100.00m                            /dev/sdc1(0)
  [cmirror-origin_mlog]     taft      lwi-ao   4.00m                            /dev/sdh1(0)

[root@taft-01 ~]# lvchange -an taft/cmirror-origin
[root@taft-01 ~]# lvchange -aye taft/cmirror-origin

[root@taft-01 ~]# lvcreate -s taft/cmirror-origin -L 50M -n snap1
  Rounding up size to full physical extent 52.00 MiB
  Logical volume "snap1" created
[root@taft-01 ~]# lvcreate -s taft/cmirror-origin -L 50M -n snap2
  Rounding up size to full physical extent 52.00 MiB
  Logical volume "snap2" created
[root@taft-01 ~]# lvcreate -s taft/cmirror-origin -L 50M -n snap3
  Rounding up size to full physical extent 52.00 MiB
  Logical volume "snap3" created

[root@taft-01 ~]# lvs
  LV             VG        Attr   LSize   Origin         Snap%  Log                 Copy%  
  cmirror-origin taft      owi-a- 100.00m                       cmirror-origin_mlog 100.00
  snap1          taft      swi-a-  52.00m cmirror-origin   0.00
  snap2          taft      swi-a-  52.00m cmirror-origin   0.00
  snap3          taft      swi-a-  52.00m cmirror-origin   0.00

[root@taft-01 ~]# lvremove taft/snap1
Do you really want to remove active clustered logical volume snap1? [y/n]: y
  Logical volume "snap1" successfully removed
[root@taft-01 ~]# lvremove taft/snap2
Do you really want to remove active clustered logical volume snap2? [y/n]: y
  Logical volume "snap2" successfully removed
[root@taft-01 ~]# lvremove taft/snap3
Do you really want to remove active clustered logical volume snap3? [y/n]: y
  Error locking on node taft-01: Command timed out
  Failed to resume cmirror-origin.
  Error locking on node taft-01: Command timed out

[DEADLOCK]


Version-Release number of selected component (if applicable):
2.6.32-94.el6.x86_64

lvm2-2.02.83-2.el6    BUILT: Tue Feb  8 10:10:57 CST 2011
lvm2-libs-2.02.83-2.el6    BUILT: Tue Feb  8 10:10:57 CST 2011
lvm2-cluster-2.02.83-2.el6    BUILT: Tue Feb  8 10:10:57 CST 2011
udev-147-2.31.el6    BUILT: Wed Jan 26 05:39:15 CST 2011
device-mapper-1.02.62-2.el6    BUILT: Tue Feb  8 10:10:57 CST 2011
device-mapper-libs-1.02.62-2.el6    BUILT: Tue Feb  8 10:10:57 CST 2011
device-mapper-event-1.02.62-2.el6    BUILT: Tue Feb  8 10:10:57 CST 2011
device-mapper-event-libs-1.02.62-2.el6    BUILT: Tue Feb  8 10:10:57 CST 2011
cmirror-2.02.83-2.el6    BUILT: Tue Feb  8 10:10:57 CST 2011


How reproducible:
everytime
Comment 1 Corey Marthaler 2011-02-15 17:58:01 UTC 
I verified that this only happens with exclusive cluster mirror snaps, not exclusive cluster linears.
Comment 2 Jonathan Earl Brassow 2011-02-15 18:41:32 UTC 
Must either find solution or disallow snaps of mirrors in a cluster...
Comment 3 Jonathan Earl Brassow 2011-02-16 23:16:23 UTC 
The creation of the snapshot preserves the exclusive lock on the origin LV, but it causes a reload of the table that uses the cluster log.  So, we go from single machine mirror to cluster mirror on one node...
Comment 4 Jonathan Earl Brassow 2011-02-17 21:04:05 UTC 
Patch posted to lvm-devel... waiting for feedback before checking-in
Comment 5 Jonathan Earl Brassow 2011-02-18 00:36:57 UTC 
upstream in version 2.02.85
Comment 7 Corey Marthaler 2011-03-18 20:09:16 UTC 
This test case now works with the latest rpms.

2.6.32-94.el6.x86_64

lvm2-2.02.83-3.el6    BUILT: Fri Mar 18 09:31:10 CDT 2011
lvm2-libs-2.02.83-3.el6    BUILT: Fri Mar 18 09:31:10 CDT 2011
lvm2-cluster-2.02.83-3.el6    BUILT: Fri Mar 18 09:31:10 CDT 2011
udev-147-2.31.el6    BUILT: Wed Jan 26 05:39:15 CST 2011
device-mapper-1.02.62-3.el6    BUILT: Fri Mar 18 09:31:10 CDT 2011
device-mapper-libs-1.02.62-3.el6    BUILT: Fri Mar 18 09:31:10 CDT 2011
device-mapper-event-1.02.62-3.el6    BUILT: Fri Mar 18 09:31:10 CDT 2011
device-mapper-event-libs-1.02.62-3.el6    BUILT: Fri Mar 18 09:31:10 CDT 2011
cmirror-2.02.83-3.el6    BUILT: Fri Mar 18 09:31:10 CDT 2011



SCENARIO - [snaphot_exclusive_mirror]
Snapshot an exclusively activated mirror
taft-03: lvcreate -m 1 -n exclusive_origin -L 100M mirror_sanity
Deactivate and then exclusively activate mirror
Taking multiple snapshots of exclusive mirror
        1 2 3 4 5 
Removing snapshots of exclusive mirror
        1 2 3 4 5 
Deactivating mirror exclusive_origin... and removing
Comment 8 errata-xmlrpc 2011-05-19 14:27:22 UTC 
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHBA-2011-0772.html