[Bug 591475] Re: Spurious abort message after successful pvmove
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On 2010-06-09T18:41:00+00:00 Clint wrote:
Created attachment 422647
A crude bug fix that would prevent the erroneous error message.
Description of problem:
pvmove relies on polldaemon.c:_wait_for_single_lv() to read the
percentage complete on the mirror that is used to do the pvmove.
However, the mirror goes away sometimes while this program is running,
presumably in between init_full_scan_done(0) and locking the volume
group. This would appear to be a race condition, so it only happens
sometimes.
When the problem occurs, a user gets something like this printed out:
/dev/sde1: Moved: 99.6%
ABORTING: Can't find mirror LV in homedirs for /dev/sde1
This is very confusing, as the user may think that the pvmove operation
failed.
Version-Release number of selected component (if applicable):
2.02.54, code appears similar in 2.02.67
How reproducible:
As this is a race condition, it does not always happen. However users
have reported it happening with enough frequency to cause alarm as the
error message
Steps to reproduce:
assuming /dev/sdb has two equal sized partitions of at least 10G
Setup:
pvcreate /dev/sdb1
pvcreate /dev/sdb2
vgcreate test /dev/sdb1 /dev/sdb2
lvcreate -L 9G -n t1 test /dev/sdb1
Then repeat these in an alternating manner:
pvmove -i1 /dev/sdb1
pvmove -i1 /dev/sdb2
It may take many iterations to reproduce the race, or it may never reproduce it, as other factors may be necessary to make it more likely (such as many more physical volumes).
Actual results:
Expected results:
I would expect that if the pvmove completes successfully, that pvmove
would show that fact rather than abort.
Additional info:
Reply at:
https://bugs.launchpad.net/ubuntu/+source/lvm2/+bug/591475/comments/4
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On 2010-06-09T18:52:55+00:00 RHEL wrote:
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux major release. Product Management has requested further
review of this request by Red Hat Engineering, for potential inclusion in a Red
Hat Enterprise Linux Major release. This request is not yet committed for
inclusion.
Reply at:
https://bugs.launchpad.net/ubuntu/+source/lvm2/+bug/591475/comments/5
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On 2010-06-10T10:42:10+00:00 Bryn wrote:
Comment on attachment 422647
A crude bug fix that would prevent the erroneous error message.
Fix mime type on attachment.
Reply at:
https://bugs.launchpad.net/ubuntu/+source/lvm2/+bug/591475/comments/7
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On 2011-01-19T22:42:20+00:00 Milan wrote:
I sent this patch to fix the issue:
https://www.redhat.com/archives/lvm-devel/2011-January/msg00133.html
Reply at:
https://bugs.launchpad.net/ubuntu/+source/lvm2/+bug/591475/comments/9
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On 2011-01-19T23:13:16+00:00 Milan wrote:
Fix in upstream lvm 2.02.82.
Reply at:
https://bugs.launchpad.net/ubuntu/+source/lvm2/+bug/591475/comments/10
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On 2011-04-04T22:21:07+00:00 Corey wrote:
I didn't see any 'ABORT' messages in the pvmove regression test output.
Marking verified in the latest rpms.
2.6.32-128.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-147-2.35.el6 BUILT: Wed Mar 30 07:32:05 CDT 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
Reply at:
https://bugs.launchpad.net/ubuntu/+source/lvm2/+bug/591475/comments/13
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On 2011-05-19T14:26:03+00:00 errata-xmlrpc wrote:
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
Reply at:
https://bugs.launchpad.net/ubuntu/+source/lvm2/+bug/591475/comments/15
** Changed in: lvm2
Status: Unknown => Fix Released
** Changed in: lvm2
Importance: Unknown => Low
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https://bugs.launchpad.net/bugs/591475
Title:
Spurious abort message after successful pvmove
Status in lvm2:
Fix Released
Status in lvm2 package in Ubuntu:
Triaged
Bug description:
Binary package hint: lvm2
lvm2 2.02.39-0ubuntu11 on Karmic. pvmove sometimes issues a spurious
error message at the end of a successful move. To wit:
# pvmove -i 60 -v /dev/sde1
Finding volume group "homedirs"
Archiving volume group "homedirs" metadata (seqno 17).
Creating logical volume pvmove0
Moving 25599 extents of logical volume homedirs/homedirs_lv
Found volume group "homedirs"
Updating volume group metadata
Creating volume group backup "/etc/lvm/backup/homedirs" (seqno 18).
Found volume group "homedirs"
Found volume group "homedirs"
Suspending homedirs-homedirs_lv (254:1) with device flush
Found volume group "homedirs"
Creating homedirs-pvmove0
Loading homedirs-pvmove0 table
Resuming homedirs-pvmove0 (254:2)
Found volume group "homedirs"
Loading homedirs-pvmove0 table
Suppressed homedirs-pvmove0 identical table reload.
Loading homedirs-homedirs_lv table
Resuming homedirs-homedirs_lv (254:1)
Checking progress every 60 seconds
/dev/sde1: Moved: 1.4%
[... time passes ...]
/dev/sde1: Moved: 99.6%
ABORTING: Can't find mirror LV in homedirs for /dev/sde1
# pvs
PV VG Fmt Attr PSize PFree
/dev/sdb1 lvm2 -- 100.00G 100.00G
/dev/sdc1 lvm2 -- 100.00G 100.00G
/dev/sdd1 lvm2 -- 100.00G 100.00G
/dev/sde1 homedirs lvm2 a- 100.00G 100.00G
/dev/sdf1 homedirs lvm2 a- 100.00G 0
/dev/sdq1 homedirs lvm2 a- 499.99G 100.01G
# vgreduce -a homedirs
Removed "/dev/sde1" from volume group "homedirs"
Physical volume "/dev/sdf1" still in use
Physical volume "/dev/sdq1" still in use
Despite the scary-looking abort message, the source PV is 100% free
and can be removed from the VG.
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