Re: scrub error: found clone without head

[Olivier Bonvalet <ceph.list-PaEMFeTk6C1QFI55V6+gNQ@public.gmane.org>]

Hi,

sorry for the late answer : trying to fix that, I tried to delete the
image (rbd rm XXX), the "rbd rm" complete without errors, but "rbd ls"
still display this image.

What should I do ?


Here the files for the PG 3.6b :

# find /var/lib/ceph/osd/ceph-28/current/3.6b_head/ -name 'rb.0.15c26.238e1f29*' -print0 | xargs -r -0 ls -l
-rw-r--r-- 1 root root 4194304 19 mai   22:52 /var/lib/ceph/osd/ceph-28/current/3.6b_head/DIR_B/DIR_6/DIR_1/DIR_C/rb.0.15c26.238e1f29.000000009221__12d7_ADE3C16B__3
-rw-r--r-- 1 root root 4194304 19 mai   23:00 /var/lib/ceph/osd/ceph-28/current/3.6b_head/DIR_B/DIR_E/DIR_0/DIR_C/rb.0.15c26.238e1f29.000000003671__12d7_261CC0EB__3
-rw-r--r-- 1 root root 4194304 19 mai   22:59 /var/lib/ceph/osd/ceph-28/current/3.6b_head/DIR_B/DIR_E/DIR_A/DIR_E/rb.0.15c26.238e1f29.0000000086a2__12d7_B10DEAEB__3

# find /var/lib/ceph/osd/ceph-23/current/3.6b_head/ -name 'rb.0.15c26.238e1f29*' -print0 | xargs -r -0 ls -l
-rw-r--r-- 1 root root 4194304 25 mars  19:18 /var/lib/ceph/osd/ceph-23/current/3.6b_head/DIR_B/DIR_6/DIR_1/DIR_C/rb.0.15c26.238e1f29.000000009221__12d7_ADE3C16B__3
-rw-r--r-- 1 root root 4194304 25 mars  19:33 /var/lib/ceph/osd/ceph-23/current/3.6b_head/DIR_B/DIR_E/DIR_0/DIR_C/rb.0.15c26.238e1f29.000000003671__12d7_261CC0EB__3
-rw-r--r-- 1 root root 4194304 25 mars  19:34 /var/lib/ceph/osd/ceph-23/current/3.6b_head/DIR_B/DIR_E/DIR_A/DIR_E/rb.0.15c26.238e1f29.0000000086a2__12d7_B10DEAEB__3

# find /var/lib/ceph/osd/ceph-5/current/3.6b_head/ -name 'rb.0.15c26.238e1f29*' -print0 | xargs -r -0 ls -l
-rw-r--r-- 1 root root 4194304 25 mars  19:18 /var/lib/ceph/osd/ceph-5/current/3.6b_head/DIR_B/DIR_6/DIR_1/DIR_C/rb.0.15c26.238e1f29.000000009221__12d7_ADE3C16B__3
-rw-r--r-- 1 root root 4194304 25 mars  19:33 /var/lib/ceph/osd/ceph-5/current/3.6b_head/DIR_B/DIR_E/DIR_0/DIR_C/rb.0.15c26.238e1f29.000000003671__12d7_261CC0EB__3
-rw-r--r-- 1 root root 4194304 25 mars  19:34 /var/lib/ceph/osd/ceph-5/current/3.6b_head/DIR_B/DIR_E/DIR_A/DIR_E/rb.0.15c26.238e1f29.0000000086a2__12d7_B10DEAEB__3


As you can see, OSD doesn't contain any other data on thoses PG for this RBD image. Should I remove them thought rados ?


In fact I remember that some of thoses files was truncated (size 0), then I manually copy data from osd-5. It was probably an error to do that.


Thanks,
Olivier

Le jeudi 23 mai 2013 à 15:53 -0700, Samuel Just a écrit :
> Can you send the filenames in the pg directories for those 4 pgs?
> -Sam
> 
> On Thu, May 23, 2013 at 3:27 PM, Olivier Bonvalet <ceph.list@daevel.fr> wrote:
> > No :
> > pg 3.7c is active+clean+inconsistent, acting [24,13,39]
> > pg 3.6b is active+clean+inconsistent, acting [28,23,5]
> > pg 3.d is active+clean+inconsistent, acting [29,4,11]
> > pg 3.1 is active+clean+inconsistent, acting [28,19,5]
> >
> > But I suppose that all PG *was* having the osd.25 as primary (on the
> > same host), which is (disabled) buggy OSD.
> >
> > Question : "12d7" in object path is the snapshot id, right ? If it's the
> > case, I haven't got any snapshot with this id for the
> > rb.0.15c26.238e1f29 image.
> >
> > So, which files should I remove ?
> >
> > Thanks for your help.
> >
> >
> > Le jeudi 23 mai 2013 à 15:17 -0700, Samuel Just a écrit :
> >> Do all of the affected PGs share osd.28 as the primary?  I think the
> >> only recovery is probably to manually remove the orphaned clones.
> >> -Sam
> >>
> >> On Thu, May 23, 2013 at 5:00 AM, Olivier Bonvalet <ceph.list@daevel.fr> wrote:
> >> > Not yet. I keep it for now.
> >> >
> >> > Le mercredi 22 mai 2013 à 15:50 -0700, Samuel Just a écrit :
> >> >> rb.0.15c26.238e1f29
> >> >>
> >> >> Has that rbd volume been removed?
> >> >> -Sam
> >> >>
> >> >> On Wed, May 22, 2013 at 12:18 PM, Olivier Bonvalet <ceph.list@daevel.fr> wrote:
> >> >> > 0.61-11-g3b94f03 (0.61-1.1), but the bug occured with bobtail.
> >> >> >
> >> >> >
> >> >> > Le mercredi 22 mai 2013 à 12:00 -0700, Samuel Just a écrit :
> >> >> >> What version are you running?
> >> >> >> -Sam
> >> >> >>
> >> >> >> On Wed, May 22, 2013 at 11:25 AM, Olivier Bonvalet <ceph.list@daevel.fr> wrote:
> >> >> >> > Is it enough ?
> >> >> >> >
> >> >> >> > # tail -n500 -f /var/log/ceph/osd.28.log | grep -A5 -B5 'found clone without head'
> >> >> >> > 2013-05-22 15:43:09.308352 7f707dd64700  0 log [INF] : 9.105 scrub ok
> >> >> >> > 2013-05-22 15:44:21.054893 7f707dd64700  0 log [INF] : 9.451 scrub ok
> >> >> >> > 2013-05-22 15:44:52.898784 7f707cd62700  0 log [INF] : 9.784 scrub ok
> >> >> >> > 2013-05-22 15:47:43.148515 7f707cd62700  0 log [INF] : 9.3c3 scrub ok
> >> >> >> > 2013-05-22 15:47:45.717085 7f707dd64700  0 log [INF] : 9.3d0 scrub ok
> >> >> >> > 2013-05-22 15:52:14.573815 7f707dd64700  0 log [ERR] : scrub 3.6b ade3c16b/rb.0.15c26.238e1f29.000000009221/12d7//3 found clone without head
> >> >> >> > 2013-05-22 15:55:07.230114 7f707d563700  0 log [ERR] : scrub 3.6b 261cc0eb/rb.0.15c26.238e1f29.000000003671/12d7//3 found clone without head
> >> >> >> > 2013-05-22 15:56:56.456242 7f707d563700  0 log [ERR] : scrub 3.6b b10deaeb/rb.0.15c26.238e1f29.0000000086a2/12d7//3 found clone without head
> >> >> >> > 2013-05-22 15:57:51.667085 7f707dd64700  0 log [ERR] : 3.6b scrub 3 errors
> >> >> >> > 2013-05-22 15:57:55.241224 7f707dd64700  0 log [INF] : 9.450 scrub ok
> >> >> >> > 2013-05-22 15:57:59.800383 7f707cd62700  0 log [INF] : 9.465 scrub ok
> >> >> >> > 2013-05-22 15:59:55.024065 7f707661a700  0 -- 192.168.42.3:6803/12142 >> 192.168.42.5:6828/31490 pipe(0x2a689000 sd=108 :6803 s=2 pgs=200652 cs=73 l=0).fault with nothing to send, going to standby
> >> >> >> > 2013-05-22 16:01:45.542579 7f7022770700  0 -- 192.168.42.3:6803/12142 >> 192.168.42.5:6828/31490 pipe(0x2a689280 sd=99 :6803 s=0 pgs=0 cs=0 l=0).accept connect_seq 74 vs existing 73 state standby
> >> >> >> > --
> >> >> >> > 2013-05-22 16:29:49.544310 7f707dd64700  0 log [INF] : 9.4eb scrub ok
> >> >> >> > 2013-05-22 16:29:53.190233 7f707dd64700  0 log [INF] : 9.4f4 scrub ok
> >> >> >> > 2013-05-22 16:29:59.478736 7f707dd64700  0 log [INF] : 8.6bb scrub ok
> >> >> >> > 2013-05-22 16:35:12.240246 7f7022770700  0 -- 192.168.42.3:6803/12142 >> 192.168.42.5:6828/31490 pipe(0x2a689280 sd=99 :6803 s=2 pgs=200667 cs=75 l=0).fault with nothing to send, going to standby
> >> >> >> > 2013-05-22 16:35:19.519019 7f707d563700  0 log [INF] : 8.700 scrub ok
> >> >> >> > 2013-05-22 16:39:15.422532 7f707dd64700  0 log [ERR] : scrub 3.1 b1869301/rb.0.15c26.238e1f29.000000000836/12d7//3 found clone without head
> >> >> >> > 2013-05-22 16:40:04.995256 7f707cd62700  0 log [ERR] : scrub 3.1 bccad701/rb.0.15c26.238e1f29.000000009a00/12d7//3 found clone without head
> >> >> >> > 2013-05-22 16:41:07.008717 7f707d563700  0 log [ERR] : scrub 3.1 8a9bec01/rb.0.15c26.238e1f29.000000009820/12d7//3 found clone without head
> >> >> >> > 2013-05-22 16:41:42.460280 7f707c561700  0 log [ERR] : 3.1 scrub 3 errors
> >> >> >> > 2013-05-22 16:46:12.385678 7f7077735700  0 -- 192.168.42.3:6803/12142 >> 192.168.42.5:6828/31490 pipe(0x2a689c80 sd=137 :6803 s=0 pgs=0 cs=0 l=0).accept connect_seq 76 vs existing 75 state standby
> >> >> >> > 2013-05-22 16:58:36.079010 7f707661a700  0 -- 192.168.42.3:6803/12142 >> 192.168.42.3:6801/11745 pipe(0x2a689a00 sd=44 :6803 s=0 pgs=0 cs=0 l=0).accept connect_seq 40 vs existing 39 state standby
> >> >> >> > 2013-05-22 16:58:36.798038 7f707d563700  0 log [INF] : 9.50c scrub ok
> >> >> >> > 2013-05-22 16:58:40.104159 7f707c561700  0 log [INF] : 9.526 scrub ok
> >> >> >> >
> >> >> >> >
> >> >> >> > Note : I have 8 scrub errors like that, on 4 impacted PG, and all impacted objects are about the same RBD image (rb.0.15c26.238e1f29).
> >> >> >> >
> >> >> >> >
> >> >> >> >
> >> >> >> > Le mercredi 22 mai 2013 à 11:01 -0700, Samuel Just a écrit :
> >> >> >> >> Can you post your ceph.log with the period including all of these errors?
> >> >> >> >> -Sam
> >> >> >> >>
> >> >> >> >> On Wed, May 22, 2013 at 5:39 AM, Dzianis Kahanovich
> >> >> >> >> <mahatma@bspu.unibel.by> wrote:
> >> >> >> >> > Olivier Bonvalet пишет:
> >> >> >> >> >>
> >> >> >> >> >> Le lundi 20 mai 2013 à 00:06 +0200, Olivier Bonvalet a écrit :
> >> >> >> >> >>> Le mardi 07 mai 2013 à 15:51 +0300, Dzianis Kahanovich a écrit :
> >> >> >> >> >>>> I have 4 scrub errors (3 PGs - "found clone without head"), on one OSD. Not
> >> >> >> >> >>>> repairing. How to repair it exclude re-creating of OSD?
> >> >> >> >> >>>>
> >> >> >> >> >>>> Now it "easy" to clean+create OSD, but in theory - in case there are multiple
> >> >> >> >> >>>> OSDs - it may cause data lost.
> >> >> >> >> >>>
> >> >> >> >> >>> I have same problem : 8 objects (4 PG) with error "found clone without
> >> >> >> >> >>> head". How can I fix that ?
> >> >> >> >> >> since "pg repair" doesn't handle that kind of errors, is there a way to
> >> >> >> >> >> manually fix that ? (it's a production cluster)
> >> >> >> >> >
> >> >> >> >> > Trying to fix manually I cause assertions in trimming process (died OSD). And
> >> >> >> >> > many others troubles. So, if you want to keep cluster running, wait for
> >> >> >> >> > developers answer. IMHO.
> >> >> >> >> >
> >> >> >> >> > About manual repair attempt: see issue #4937. Also similar results - in subject
> >> >> >> >> > "Inconsistent PG's, repair ineffective".
> >> >> >> >> >
> >> >> >> >> > --
> >> >> >> >> > WBR, Dzianis Kahanovich AKA Denis Kaganovich, http://mahatma.bspu.unibel.by/
> >> >> >> >> > _______________________________________________
> >> >> >> >> > ceph-users mailing list
> >> >> >> >> > ceph-users@lists.ceph.com
> >> >> >> >> > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
> >> >> >> >>
> >> >> >> >
> >> >> >> >
> >> >> >> --
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> >> >> >
> >> >> >
> >> >>
> >> >
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