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

[Nithya Balachandran]

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 at redhat.com>
wrote:

>
>
> On 17 January 2018 at 16:04, Ing. Luca Lazzeroni - Trend Servizi Srl <
> luca at trendservizi.it> 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 at trendservizi.it> 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
>>>
>>> _______________________________________________
>>> Gluster-users mailing list
>>> Gluster-users at gluster.org
>>> http://lists.gluster.org/mailman/listinfo/gluster-users
>>>
>>
>>
>> --
>> Ing. Luca Lazzeroni
>> Responsabile Ricerca e Sviluppo
>> Trend Servizi Srl
>> Tel: 0376/631761
>> Web: https://www.trendservizi.it
>>
>>
>
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