Re: Inconsistent PGs that ceph pg repair does not fix

[Andras Pataki <apataki-0QEYAsm1mgjsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>]

Hi Sam,

I saw that ceph 0.94.3 is out and it contains a resolution to the issue below (http://tracker.ceph.com/issues/12577).  I installed it on our cluster, but unfortunately it didn't resolve the issue.  Same as before, I have a couple of inconsistent pg's, and run ceph pg repair on them - the OSD says:

2015-09-08 11:21:53.930324 7f49c17ea700  0 log_channel(cluster) log [INF] : 2.439 repair starts
2015-09-08 11:27:57.708394 7f49c17ea700 -1 log_channel(cluster) log [ERR] : repair 2.439 b029e439/10000022d93.00000f0c/head//2 on disk data digest 0xb3d78a6e != 0xa3944ad0
2015-09-08 11:28:32.359938 7f49c17ea700 -1 log_channel(cluster) log [ERR] : 2.439 repair 1 errors, 0 fixed
2015-09-08 11:28:32.364506 7f49c17ea700  0 log_channel(cluster) log [INF] : 2.439 deep-scrub starts
2015-09-08 11:29:18.650876 7f49c17ea700 -1 log_channel(cluster) log [ERR] : deep-scrub 2.439 b029e439/10000022d93.00000f0c/head//2 on disk data digest 0xb3d78a6e != 0xa3944ad0
2015-09-08 11:29:23.136109 7f49c17ea700 -1 log_channel(cluster) log [ERR] : 2.439 deep-scrub 1 errors

$ ceph tell osd.* version | grep version | sort | uniq -c
     94     "version": "ceph version 0.94.3 (95cefea9fd9ab740263bf8bb4796fd864d9afe2b)"

Could you have another look?

Thanks,

Andras


________________________________________
From: Andras Pataki
Sent: Monday, August 3, 2015 4:09 PM
To: Samuel Just
Cc: ceph-users-idqoXFIVOFJgJs9I8MT0rw@public.gmane.org; ceph-devel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [ceph-users] Inconsistent PGs that ceph pg repair does not fix

Done: http://tracker.ceph.com/issues/12577
BTW, I¹m using the latest release 0.94.2 on all machines.

Andras


On 8/3/15, 3:38 PM, "Samuel Just" <sjust-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> wrote:

>Hrm, that's certainly supposed to work.  Can you make a bug?  Be sure
>to note what version you are running (output of ceph-osd -v).
>-Sam
>
>On Mon, Aug 3, 2015 at 12:34 PM, Andras Pataki
><apataki-0QEYAsm1mgjsfHDXvbKv3WD2FQJk+8+b@public.gmane.org> wrote:
>> Summary: I am having problems with inconsistent PG's that the 'ceph pg
>> repair' command does not fix.  Below are the details.  Any help would be
>> appreciated.
>>
>> # Find the inconsistent PG's
>> ~# ceph pg dump | grep inconsistent
>> dumped all in format plain
>> 2.439 42080 00 017279507143 31033103 active+clean+inconsistent2015-08-03
>> 14:49:17.29288477323'2250145 77480:890566 [78,54]78 [78,54]78
>> 77323'22501452015-08-03 14:49:17.29253877323'2250145 2015-08-03
>> 14:49:17.292538
>> 2.8b9 40830 00 016669590823 30513051 active+clean+inconsistent2015-08-03
>> 14:46:05.14006377323'2249886 77473:897325 [7,72]7 [7,72]7
>> 77323'22498862015-08-03 14:22:47.83406377323'2249886 2015-08-03
>> 14:22:47.834063
>>
>> # Look at the first one:
>> ~# ceph pg deep-scrub 2.439
>> instructing pg 2.439 on osd.78 to deep-scrub
>>
>> # The logs of osd.78 show:
>> 2015-08-03 15:16:34.409738 7f09ec04a700  0 log_channel(cluster) log
>>[INF] :
>> 2.439 deep-scrub starts
>> 2015-08-03 15:16:51.364229 7f09ec04a700 -1 log_channel(cluster) log
>>[ERR] :
>> deep-scrub 2.439 b029e439/10000022d93.00000f0c/head//2 on disk data
>>digest
>> 0xb3d78a6e != 0xa3944ad0
>> 2015-08-03 15:16:52.763977 7f09ec04a700 -1 log_channel(cluster) log
>>[ERR] :
>> 2.439 deep-scrub 1 errors
>>
>> # Finding the object in question:
>> ~# find ~ceph/osd/ceph-78/current/2.439_head -name
>>10000022d93.00000f0c* -ls
>> 21510412310 4100 -rw-r--r--   1 root     root      4194304 Jun 30 17:09
>>
>>/var/lib/ceph/osd/ceph-78/current/2.439_head/DIR_9/DIR_3/DIR_4/DIR_E/1000
>>0022d93.00000f0c__head_B029E439__2
>> ~# md5sum
>>
>>/var/lib/ceph/osd/ceph-78/current/2.439_head/DIR_9/DIR_3/DIR_4/DIR_E/1000
>>0022d93.00000f0c__head_B029E439__2
>> 4e4523244deec051cfe53dd48489a5db
>>
>>/var/lib/ceph/osd/ceph-78/current/2.439_head/DIR_9/DIR_3/DIR_4/DIR_E/1000
>>0022d93.00000f0c__head_B029E439__2
>>
>> # The object on the backup osd:
>> ~# find ~ceph/osd/ceph-54/current/2.439_head -name
>>10000022d93.00000f0c* -ls
>> 6442614367 4100 -rw-r--r--   1 root     root      4194304 Jun 30 17:09
>>
>>/var/lib/ceph/osd/ceph-54/current/2.439_head/DIR_9/DIR_3/DIR_4/DIR_E/1000
>>0022d93.00000f0c__head_B029E439__2
>> ~# md5sum
>>
>>/var/lib/ceph/osd/ceph-54/current/2.439_head/DIR_9/DIR_3/DIR_4/DIR_E/1000
>>0022d93.00000f0c__head_B029E439__2
>> 4e4523244deec051cfe53dd48489a5db
>>
>>/var/lib/ceph/osd/ceph-54/current/2.439_head/DIR_9/DIR_3/DIR_4/DIR_E/1000
>>0022d93.00000f0c__head_B029E439__2
>>
>> # They don't seem to be different.
>> # When I try repair:
>> ~# ceph pg repair 2.439
>> instructing pg 2.439 on osd.78 to repair
>>
>> # The osd.78 logs show:
>> 2015-08-03 15:19:21.775933 7f09ec04a700  0 log_channel(cluster) log
>>[INF] :
>> 2.439 repair starts
>> 2015-08-03 15:19:38.088673 7f09ec04a700 -1 log_channel(cluster) log
>>[ERR] :
>> repair 2.439 b029e439/10000022d93.00000f0c/head//2 on disk data digest
>> 0xb3d78a6e != 0xa3944ad0
>> 2015-08-03 15:19:39.958019 7f09ec04a700 -1 log_channel(cluster) log
>>[ERR] :
>> 2.439 repair 1 errors, 0 fixed
>> 2015-08-03 15:19:39.962406 7f09ec04a700  0 log_channel(cluster) log
>>[INF] :
>> 2.439 deep-scrub starts
>> 2015-08-03 15:19:56.510874 7f09ec04a700 -1 log_channel(cluster) log
>>[ERR] :
>> deep-scrub 2.439 b029e439/10000022d93.00000f0c/head//2 on disk data
>>digest
>> 0xb3d78a6e != 0xa3944ad0
>> 2015-08-03 15:19:58.348083 7f09ec04a700 -1 log_channel(cluster) log
>>[ERR] :
>> 2.439 deep-scrub 1 errors
>>
>> The inconsistency is not fixed.  Any hints of what should be done next?
>> I have tried  a few things:
>>  * Stop the primary osd, remove the object from the filesystem, restart
>>the
>> OSD and issue a repair.  It didn't work - it sais that one object is
>> missing, but did not copy it from the backup.
>>  * I tried the same on the backup (remove the file) - it also didn't get
>> copied back from the primary in a repair.
>>
>> Any help would be appreciated.
>>
>> Thanks,
>>
>> Andras
>> apataki-0QEYAsm1mgjsfHDXvbKv3WD2FQJk+8+b@public.gmane.org
>>
>>
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