Re: [Possibile SPAM] Re: Strange messages in mnt-xxx.log

[Nithya Balachandran <nbalacha@xxxxxxxxxx>]

Hi,

Thank you for reporting this. It appears to be a problem with 1xn volumes (single dht subvol) and I could reproduce this with a single brick pure distribute volume. I have filed a BZ for this [1] and posted a patch.

The messages do not indicate a problem and can be ignored.

Regards,

Nithya

[1] https://bugzilla.redhat.com/show_bug.cgi?id=1537457

On 23 January 2018 at 11:16, Nithya Balachandran <nbalacha@xxxxxxxxxx> wrote:

On 17 January 2018 at 16:04, Ing. Luca Lazzeroni - Trend Servizi Srl <luca@xxxxxxxxxxxxxxx> wrote:

Here's the volume info:

Volume Name: gv2a2
Type: Replicate
Volume ID: 83c84774-2068-4bfc-b0b9-3e6b93705b9f
Status: Started
Snapshot Count: 0
Number of Bricks: 1 x (2 + 1) = 3
Transport-type: tcp
Bricks:
Brick1: gluster1:/bricks/brick2/gv2a2
Brick2: gluster3:/bricks/brick3/gv2a2
Brick3: gluster2:/bricks/arbiter_brick_gv2a2/gv2a2 (arbiter)
Options Reconfigured:
storage.owner-gid: 107
storage.owner-uid: 107
user.cifs: off
features.shard: on
cluster.shd-wait-qlength: 10000
cluster.shd-max-threads: 8
cluster.locking-scheme: granular
cluster.data-self-heal-algorithm: full
cluster.server-quorum-type: server
cluster.quorum-type: auto
cluster.eager-lock: enable
network.remote-dio: enable
performance.low-prio-threads: 32
performance.io-cache: off
performance.read-ahead: off
performance.quick-read: off
transport.address-family: inet
nfs.disable: off
performance.client-io-threads: off

The only client I'm using is FUSE client used to mount the gluster volume. On the gluster volume there is a maximum of 15 files ("big" files because they host VM images) accessed by qemu-kvm as normal files on the FUSE mounted volume.

By inspecting the code I've found that the message is logged in 2 situations:

1) A real "Hole" in DHT

2) A "virgin" file being created

I think this is the second situation because that message appears only when I create a new qcow2 volume to host VM image.

 These messages should ideally be seen only for directories and I have never seen it with a null gfid so far. I'll try to reproduce this and get back to you.

Regards,

Nithya

 

Il 17/01/2018 04:54, Nithya Balachandran ha scritto:

Hi,

On 16 January 2018 at 18:56, Ing. Luca Lazzeroni - Trend Servizi Srl <luca@xxxxxxxxxxxxxxx> wrote:

Hi,

I'm testing gluster 3.12.4 and, by inspecting log files /var/log/glusterfs/mnt-gv0.log (gv0 is the volume name), I found many lines saying:

[2018-01-15 09:45:41.066914] I [MSGID: 109063] [dht-layout.c:716:dht_layout_normalize] 0-gv0-dht: Found anomalies in (null) (gfid = 00000000-0000-0000-0000-000000000000). Holes=1 overlaps=0
[2018-01-15 09:45:45.755021] I [MSGID: 109063] [dht-layout.c:716:dht_layout_normalize] 0-gv0-dht: Found anomalies in (null) (gfid = 00000000-0000-0000-0000-000000000000). Holes=1 overlaps=0
[2018-01-15 14:02:29.171437] I [MSGID: 109063] [dht-layout.c:716:dht_layout_normalize] 0-gv0-dht: Found anomalies in (null) (gfid = 00000000-0000-0000-0000-000000000000). Holes=1 overlaps=0

What do they mean ? Is there any real problem ?

Please provide the following details:

gluster volume info

what clients you are using and what operations being performed

Any steps to reproduce this issue.

Thanks,

Nithya

Thank you,


--
Ing. Luca Lazzeroni
Responsabile Ricerca e Sviluppo
Trend Servizi Srl
Tel: 0376/631761
Web: https://www.trendservizi.it

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-- 
Ing. Luca Lazzeroni
Responsabile Ricerca e Sviluppo
Trend Servizi Srl
Tel: 0376/631761
Web: https://www.trendservizi.it

_______________________________________________
Gluster-users mailing list
Gluster-users@xxxxxxxxxxx
http://lists.gluster.org/mailman/listinfo/gluster-users