Re: Files from one brick missing from readdir

[Nithya Balachandran <nbalacha@xxxxxxxxxx>]

Hi Hans,

Never mind - I found it. It looks like the same problem as reported by the other user. In both cases, this is a pure distribute volume.

See packet 154.The iatt is null for all entries. It looks like a .glusterfs gfid link is missing on that brick.

Would you prefer that I send the steps to recover in a private email?

Regards,

Nithya

On 9 July 2018 at 14:49, Nithya Balachandran <nbalacha@xxxxxxxxxx> wrote:

Or even better, the brick on which those files exist and the gluster volume status output for the volume.

Thanks,

Nithya

On 9 July 2018 at 14:42, Nithya Balachandran <nbalacha@xxxxxxxxxx> wrote:

Thanks Hans. What are the names of the "missing" files?

Regards,

Nithya

On 9 July 2018 at 13:30, Nithya Balachandran <nbalacha@xxxxxxxxxx> wrote:

Hi Hans,

Another user has reported something similar and we are still debugging this.

Would you mind taking a tcpdump of the client while listing the directory from a FUSE client and sending it to me? Please use 

tcpdump -i any -s 0 -w /var/tmp/dirls.pcap tcp and not port 22

Also, please send the output of gluster volume info and gluster volume get <volname> all.

Thanks,

Nithya

On 9 July 2018 at 12:51, Hans Henrik Happe <happe@xxxxxx> wrote:

Hi,

After an upgrade from 3.7 -> 3.10 -> 3.12.9 that seemed to go smoothly,
we have experienced missing files and dirs when listing directories.

We are using a distributed setup with 20 bricks (no redundance from
glusterfs).

The dirs and files can be referenced directly, but does not show up in
listings (readdir, i.e. ls). Renaming them works, but they still does
not show up.

The first time we discovered this, we noticed that files slowly
reappeared and finally all were there. After that we started a
fix-layout which is still running (5mio dirs). After this we would
compare brick files to the mounted fs.

Yesterday we again discovered some missing files in a dir. After some
poking around we found that all missing files were located on the same
brick.

Comparing dir xattr did not give us a clue:


Brick with missing files:

# getfattr  -m . -d -e hex backup
# file: backup
trusted.gfid=0x8613f6e0317141918b42d8c8063ffbce
trusted.glusterfs.dht=0x0000000100000000b2169fa3bf11b4e7
trusted.glusterfs.quota.6e0ab807-6eed-4af1-92b8-0db3ca7a19e0.contri.1=0x00000000d65e340000000000000000750000000000000001
trusted.glusterfs.quota.dirty=0x3000
trusted.glusterfs.quota.size.1=0x00000000d65e340000000000000000750000000000000001

Other brick:

# getfattr  -m . -d -e hex backup
# file: backup
trusted.gfid=0x8613f6e0317141918b42d8c8063ffbce
trusted.glusterfs.dht=0x0000000100000000bf11b4e8cbe5e488
trusted.glusterfs.quota.6e0ab807-6eed-4af1-92b8-0db3ca7a19e0.contri.1=0x00000000b03aa80000000000000000700000000000000001
trusted.glusterfs.quota.dirty=0x3000
trusted.glusterfs.quota.size.1=0x00000000b03aa80000000000000000700000000000000001


Anyone who experienced this or have some clues to what might be wrong?

Cheers,
Hans Henrik
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