Is there a possibility to lose data if I use "cephfs-data-scan init --force-init"?
On Mon, Oct 21, 2019 at 4:36 AM Yan, Zheng <ukernel@xxxxxxxxx> wrote:
On Fri, Oct 18, 2019 at 9:10 AM Gustavo Tonini <gustavotonini@xxxxxxxxx> wrote:
>
> Hi Zheng,
> the cluster is running ceph mimic. This warning about network only appears when using nautilus' cephfs-journal-tool.
>
> "cephfs-data-scan scan_links" does not report any issue.
>
> How could variable "newparent" be NULL at https://github.com/ceph/ceph/blob/master/src/mds/SnapRealm.cc#L599 ? Is there a way to fix this?
>
try 'cephfs-data-scan init'. It will setup root inode's snaprealm.
> On Thu, Oct 17, 2019 at 9:58 PM Yan, Zheng <ukernel@xxxxxxxxx> wrote:
>>
>> On Thu, Oct 17, 2019 at 10:19 PM Gustavo Tonini <gustavotonini@xxxxxxxxx> wrote:
>> >
>> > No. The cluster was just rebalancing.
>> >
>> > The journal seems damaged:
>> >
>> > ceph@deployer:~$ cephfs-journal-tool --rank=fs_padrao:0 journal inspect
>> > 2019-10-16 17:46:29.596 7fcd34cbf700 -1 NetHandler create_socket couldn't create socket (97) Address family not supported by protocol
>>
>> corrupted journal shouldn't cause error like this. This is more like
>> network issue. please double check network config of your cluster.
>>
>> > Overall journal integrity: DAMAGED
>> > Corrupt regions:
>> > 0x1c5e4d904ab-1c5e4d9ddbc
>> > ceph@deployer:~$
>> >
>> > Could a journal reset help with this?
>> >
>> > I could snapshot all FS pools and export the journal before to guarantee a rollback to this state if something goes wrong with jounal reset.
>> >
>> > On Thu, Oct 17, 2019, 09:07 Yan, Zheng <ukernel@xxxxxxxxx> wrote:
>> >>
>> >> On Tue, Oct 15, 2019 at 12:03 PM Gustavo Tonini <gustavotonini@xxxxxxxxx> wrote:
>> >> >
>> >> > Dear ceph users,
>> >> > we're experiencing a segfault during MDS startup (replay process) which is making our FS inaccessible.
>> >> >
>> >> > MDS log messages:
>> >> >
>> >> > Oct 15 03:41:39.894584 mds1 ceph-mds: -472> 2019-10-15 00:40:30.201 7f3c08f49700 1 -- 192.168.8.195:6800/3181891717 <== osd.26 192.168.8.209:6821/2419345 3 ==== osd_op_reply(21 1.00000000 [getxattr] v0'0 uv0 _ondisk_ = -61 ((61) No data available)) v8 ==== 154+0+0 (3715233608 0 0) 0x2776340 con 0x18bd500
>> >> > Oct 15 03:41:39.894584 mds1 ceph-mds: -472> 2019-10-15 00:40:30.201 7f3c00589700 10 MDSIOContextBase::complete: 18C_IO_Inode_Fetched
>> >> > Oct 15 03:41:39.894658 mds1 ceph-mds: -472> 2019-10-15 00:40:30.201 7f3c00589700 10 mds.0.cache.ino(0x100) _fetched got 0 and 544
>> >> > Oct 15 03:41:39.894658 mds1 ceph-mds: -472> 2019-10-15 00:40:30.201 7f3c00589700 10 mds.0.cache.ino(0x100) magic is 'ceph fs volume v011' (expecting 'ceph fs volume v011')
>> >> > Oct 15 03:41:39.894735 mds1 ceph-mds: -472> 2019-10-15 00:40:30.201 7f3c00589700 10 mds.0.cache.snaprealm(0x100 seq 1 0x1799c00) open_parents [1,head]
>> >> > Oct 15 03:41:39.894735 mds1 ceph-mds: -472> 2019-10-15 00:40:30.201 7f3c00589700 10 mds.0.cache.ino(0x100) _fetched [inode 0x100 [...2,head] ~mds0/ auth v275131 snaprealm=0x1799c00 f(v0 1=1+0) n(v76166 rc2020-07-17 15:29:27.000000 b41838692297 -3184=-3168+-16)/n() (iversion lock) 0x18bf800]
>> >> > Oct 15 03:41:39.894821 mds1 ceph-mds: -472> 2019-10-15 00:40:30.201 7f3c00589700 10 MDSIOContextBase::complete: 18C_IO_Inode_Fetched
>> >> > Oct 15 03:41:39.894821 mds1 ceph-mds: -472> 2019-10-15 00:40:30.201 7f3c00589700 10 mds.0.cache.ino(0x1) _fetched got 0 and 482
>> >> > Oct 15 03:41:39.894891 mds1 ceph-mds: -472> 2019-10-15 00:40:30.201 7f3c00589700 10 mds.0.cache.ino(0x1) magic is 'ceph fs volume v011' (expecting 'ceph fs volume v011')
>> >> > Oct 15 03:41:39.894958 mds1 ceph-mds: -472> 2019-10-15 00:40:30.205 7f3c00589700 -1 *** Caught signal (Segmentation fault) **#012 in thread 7f3c00589700 thread_name:fn_anonymous#012#012 ceph version 13.2.6 (7b695f835b03642f85998b2ae7b6dd093d9fbce4) mimic (stable)#012 1: (()+0x11390) [0x7f3c0e48a390]#012 2: (operator<<(std::ostream&, SnapRealm const&)+0x42) [0x72cb92]#012 3: (SnapRealm::merge_to(SnapRealm*)+0x308) [0x72f488]#012 4: (CInode::decode_snap_blob(ceph::buffer::list&)+0x53) [0x6e1f63]#012 5: (CInode::decode_store(ceph::buffer::list::iterator&)+0x76) [0x702b86]#012 6: (CInode::_fetched(ceph::buffer::list&, ceph::buffer::list&, Context*)+0x1b2) [0x702da2]#012 7: (MDSIOContextBase::complete(int)+0x119) [0x74fcc9]#012 8: (Finisher::finisher_thread_entry()+0x12e) [0x7f3c0ebffece]#012 9: (()+0x76ba) [0x7f3c0e4806ba]#012 10: (clone()+0x6d) [0x7f3c0dca941d]#012 NOTE: a copy of the executable, or `objdump -rdS <executable>` is needed to interpret this.
>> >> > Oct 15 03:41:39.895400 mds1 ceph-mds: --- logging levels ---
>> >> > Oct 15 03:41:39.895473 mds1 ceph-mds: 0/ 5 none
>> >> > Oct 15 03:41:39.895473 mds1 ceph-mds: 0/ 1 lockdep
>> >> >
>> >>
>> >> looks like snap info for root inode is corrupted. did you do any
>> >> unusually operation before this happened?
>> >>
>> >>
>> >> >
>> >> > Cluster status information:
>> >> >
>> >> > cluster:
>> >> > id: b8205875-e56f-4280-9e52-6aab9c758586
>> >> > health: HEALTH_WARN
>> >> > 1 filesystem is degraded
>> >> > 1 nearfull osd(s)
>> >> > 11 pool(s) nearfull
>> >> >
>> >> > services:
>> >> > mon: 3 daemons, quorum mon1,mon2,mon3
>> >> > mgr: mon1(active), standbys: mon2, mon3
>> >> > mds: fs_padrao-1/1/1 up {0=mds1=up:replay(laggy or crashed)}
>> >> > osd: 90 osds: 90 up, 90 in
>> >> >
>> >> > data:
>> >> > pools: 11 pools, 1984 pgs
>> >> > objects: 75.99 M objects, 285 TiB
>> >> > usage: 457 TiB used, 181 TiB / 639 TiB avail
>> >> > pgs: 1896 active+clean
>> >> > 87 active+clean+scrubbing+deep+repair
>> >> > 1 active+clean+scrubbing
>> >> >
>> >> > io:
>> >> > client: 89 KiB/s wr, 0 op/s rd, 3 op/s wr
>> >> >
>> >> > Has anyone seen anything like this?
>> >> >
>> >> > Regards,
>> >> > Gustavo.
>> >> > _______________________________________________
>> >> > ceph-users mailing list
>> >> > ceph-users@xxxxxxxxxxxxxx
>> >> > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
>
>
>
> --
> Gustavo.
Gustavo.
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