Re: mds crash loop

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-----Original message-----
From:	Yan, Zheng <ukernel@xxxxxxxxx>
Sent:	Thu 07-11-2019 07:21
Subject:	Re:  Re: mds crash loop
To:	Karsten Nielsen <karsten@xxxxxxxxxx>; 
CC:	ceph-users@xxxxxxx; 
> On Thu, Nov 7, 2019 at 5:50 AM Karsten Nielsen <karsten@xxxxxxxxxx> wrote:
> >
> > -----Original message-----
> > From:   Yan, Zheng <ukernel@xxxxxxxxx>
> > Sent:   Wed 06-11-2019 14:16
> > Subject:        Re:  mds crash loop
> > To:     Karsten Nielsen <karsten@xxxxxxxxxx>;
> > CC:     ceph-users@xxxxxxx;
> > > On Wed, Nov 6, 2019 at 4:42 PM Karsten Nielsen <karsten@xxxxxxxxxx> wrote:
> > > >
> > > > -----Original message-----
> > > > From:   Yan, Zheng <ukernel@xxxxxxxxx>
> > > > Sent:   Wed 06-11-2019 08:15
> > > > Subject:        Re:  mds crash loop
> > > > To:     Karsten Nielsen <karsten@xxxxxxxxxx>;
> > > > CC:     ceph-users@xxxxxxx;
> > > > > On Tue, Nov 5, 2019 at 5:29 PM Karsten Nielsen <karsten@xxxxxxxxxx> 
> wrote:
> > > > > >
> > > > > > Hi,
> > > > > >
> > > > > > Last week I upgraded my ceph cluster from luminus to mimic 13.2.6
> > > > > > It was running fine for a while but yesterday my mds went into a crash
> > > loop.
> > > > > >
> > > > > > I have 1 active and 1 standby mds for my cephfs both of which is 
> running
> > > the
> > > > > same crash loop.
> > > > > > I am running ceph based on https://hub.docker.com/r/ceph/daemon 
> version
> > > > > v3.2.7-stable-3.2-minic-centos-7-x86_64 with a etcd kv store.
> > > > > >
> > > > > > Log details are: https://paste.debian.net/1113943/
> > > > > >
> > > > >
> > > > > please try again with debug_mds=20.  Thanks
> > > > >
> > > > > Yan, Zheng
> > > >
> > > > Yes I have set that and had to move to pastebin.com as debian apperently 
> only
> > > supports 150k
> > > >
> > > >
> > > > https://pastebin.com/Gv7c5h54
> > > >
> > >
> > > Looks like on-disk root inode is corrupted. have you encountered any
> > > unusually things during the upgrade?
> > >
> > > please run 'rados -p <cephfs metadata pool> stat 1.00000000.inode' ,
> > > check if the object is modified before or after the 'luminous ->
> > > 13.2.6' upgrade.
> > > To fix the corrupted object.  Run  'cephfs-data-scan init
> > > --force-init'. Then restart mds. After mds become active, run 'ceph
> > > daemon mds.x scrub_path / force repair'
> > >
> >
> > I followed the steps I got the mds started but now a lot of files are in 
> lost+found 24283 and I have these errors in the mds log
> >
>  'cephfs-data-scan init --force-init' does not move files into
> lost+found. have you ever run other 'cephfs-data-scan foo' command or
> 'cephfs-journal-tool foo' command?

I have had a similar problem with the cluster before where I went through the cycle of:
https://docs.ceph.com/docs/mimic/cephfs/disaster-recovery/ -> Using an alternate metadata pool for recovery

I did run the cephfs-journal-tool journal reset command, mostly because cephfs is not that utilized so I thought it was safe to do as after the upgrade the cluster has not been used much, so data lose would be minimal - apparently I was wrong.

>
> > 2019-11-06 20:20:18.215 7f0bd9090700  1 mds.0.32011 cluster recovered.
> > 2019-11-06 20:20:19.019 7f0bd2dfa700  0 mds.0.cache.dir(0x100013acfcb) 
> _fetched missing object for [dir 0x100013acfcb /nextcloud/custom_apps/carnet/ 
> [2,head] auth v=0 cv=0/0 ap=1+0+0 state=1073741888|fetching f() n() 
> hs=0+0,ss=0+0 | waiter=1 authpin=1 0x55d4dc4f5100]
> > 2019-11-06 20:20:19.019 7f0bd2dfa700 -1 log_channel(cluster) log [ERR] : dir 
> 0x100013acfcb object missing on disk; some files may be lost 
> (/nextcloud/custom_apps/carnet)
> > 2019-11-06 20:20:19.275 7f0bd2dfa700  0 mds.0.cache.dir(0x100013a3156) 
> _fetched missing object for [dir 0x100013a3156 /nextcloud/custom_apps/mail/ 
> [2,head] auth v=0 cv=0/0 ap=1+0+0 state=1073741888|fetching f() n() 
> hs=0+0,ss=0+0 | waiter=1 authpin=1 0x55d4dcc40000]
> > 2019-11-06 20:20:19.275 7f0bd2dfa700 -1 log_channel(cluster) log [ERR] : dir 
> 0x100013a3156 object missing on disk; some files may be lost 
> (/nextcloud/custom_apps/mail)
> > 2019-11-06 20:20:19.371 7f0bd2dfa700  0 mds.0.cache.dir(0x100013abb3c) 
> _fetched missing object for [dir 0x100013abb3c 
> /nextcloud/custom_apps/passwords/ [2,head] auth v=0 cv=0/0 ap=1+0+0 
> state=1073741888|fetching f() n() hs=0+0,ss=0+0 | waiter=1 authpin=1 
> 0x55d4dcc40700]
> > 2019-11-06 20:20:19.371 7f0bd2dfa700 -1 log_channel(cluster) log [ERR] : dir 
> 0x100013abb3c object missing on disk; some files may be lost 
> (/nextcloud/custom_apps/passwords)
> > 2019-11-06 20:20:19.383 7f0bd2dfa700  0 mds.0.cache.dir(0x100013a9b9b) 
> _fetched missing object for [dir 0x100013a9b9b 
> /nextcloud/custom_apps/phonetrack/ [2,head] auth v=0 cv=0/0 ap=1+0+0 
> state=1073741888|fetching f() n() hs=0+0,ss=0+0 | waiter=1 authpin=1 
> 0x55d4dcc40e00]
> > 2019-11-06 20:20:19.383 7f0bd2dfa700 -1 log_channel(cluster) log [ERR] : dir 
> 0x100013a9b9b object missing on disk; some files may be lost 
> (/nextcloud/custom_apps/phonetrack)
> > 2019-11-06 20:20:19.431 7f0bd2dfa700  0 mds.0.cache.dir(0x100013a2659) 
> _fetched missing object for [dir 0x100013a2659 
> /nextcloud/custom_apps/richdocuments/ [2,head] auth v=0 cv=0/0 ap=1+0+0 
> state=1073741888|fetching f() n() hs=0+0,ss=0+0 | waiter=1 authpin=1 
> 0x55d4dcc41500]
> > 2019-11-06 20:20:19.431 7f0bd2dfa700 -1 log_channel(cluster) log [ERR] : dir 
> 0x100013a2659 object missing on disk; some files may be lost 
> (/nextcloud/custom_apps/richdocuments)
> > 2019-11-06 20:20:22.360 7f0bd9090700  1 mds.k8s-node-01 Updating MDS map to 
> version 32015 from mon.1
> >
> >
> > >
> > > > - Karsten
> > > >
> > > > >
> > > > > > Thanks for any hints
> > > > > > - Karsten
> > > > > > _______________________________________________
> > > > > > ceph-users mailing list -- ceph-users@xxxxxxx
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> > > > >
> > > > >
> > >
> > >
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> > To unsubscribe send an email to ceph-users-leave@xxxxxxx
> 
>
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