[Gluster-users] Files from one brick missing from readdir

[Niels de Vos]

On Mon, Jul 09, 2018 at 01:30:23PM +0530, Nithya Balachandran 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

Last week I came across a patch that fixes a bug in the FUSE kernel
module:
  https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c6cdd51404b7ac12dd95173ddfc548c59ecf037f

This was included in linux-4.14 but has been marked for backporting to
older kernels as well. If the description matches the experienced
behaviour, running with an updates (or patched) kernel may help.

Niels


> 
> 
> 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 at nbi.dk> 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=0x00000000d65e3400000000000000
> > 00750000000000000001
> >
> > 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=0x00000000b03aa800000000000000
> > 00700000000000000001
> >
> >
> > Anyone who experienced this or have some clues to what might be wrong?
> >
> > Cheers,
> > Hans Henrik
> > _______________________________________________
> > Gluster-users mailing list
> > Gluster-users at gluster.org
> > https://lists.gluster.org/mailman/listinfo/gluster-users
> >

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