[Gluster-devel] Empty info file preventing glusterd from starting

[Atin Mukherjee]

On Tue, May 9, 2017 at 6:10 PM, ABHISHEK PALIWAL <abhishpaliwal at gmail.com>
wrote:

> Hi Atin,
>
> Thanks for your reply.
>
>
> Its urgent because this error is very rarely reproducible we have seen
> this 2 3 times in our system till now.
>
> We have delivery in near future so that we want it asap. Please try to
> review it internally.
>

I don't think your statements justified the reason of urgency as (a) you
have mentioned it to be *rarely* reproducible and (b) I am still waiting
for a real use case where glusterd will go through multiple restarts in a
loop?


> Regards,
> Abhishek
>
> On Tue, May 9, 2017 at 5:58 PM, Atin Mukherjee <amukherj at redhat.com>
> wrote:
>
>>
>>
>> On Tue, May 9, 2017 at 3:37 PM, ABHISHEK PALIWAL <abhishpaliwal at gmail.com
>> > wrote:
>>
>>> + Muthu-vingeshwaran
>>>
>>> On Tue, May 9, 2017 at 11:30 AM, ABHISHEK PALIWAL <
>>> abhishpaliwal at gmail.com> wrote:
>>>
>>>> Hi Atin/Team,
>>>>
>>>> We are using gluster-3.7.6 with setup of two brick and while restart of
>>>> system I have seen that the glusterd daemon is getting failed from start.
>>>>
>>>>
>>>> At the time of analyzing the logs from etc-glusterfs.......log file I
>>>> have received the below logs
>>>>
>>>>
>>>> [2017-05-06 03:33:39.798087] I [MSGID: 100030] [glusterfsd.c:2348:main]
>>>> 0-/usr/sbin/glusterd: Started running /usr/sbin/glusterd version 3.7.6
>>>> (args: /usr/sbin/glusterd -p /var/run/glusterd.pid --log-level INFO)
>>>> [2017-05-06 03:33:39.807859] I [MSGID: 106478] [glusterd.c:1350:init]
>>>> 0-management: Maximum allowed open file descriptors set to 65536
>>>> [2017-05-06 03:33:39.807974] I [MSGID: 106479] [glusterd.c:1399:init]
>>>> 0-management: Using /system/glusterd as working directory
>>>> [2017-05-06 03:33:39.826833] I [MSGID: 106513]
>>>> [glusterd-store.c:2047:glusterd_restore_op_version] 0-glusterd:
>>>> retrieved op-version: 30706
>>>> [2017-05-06 03:33:39.827515] E [MSGID: 106206]
>>>> [glusterd-store.c:2562:glusterd_store_update_volinfo] 0-management:
>>>> Failed to get next store iter
>>>> [2017-05-06 03:33:39.827563] E [MSGID: 106207]
>>>> [glusterd-store.c:2844:glusterd_store_retrieve_volume] 0-management:
>>>> Failed to update volinfo for c_glusterfs volume
>>>> [2017-05-06 03:33:39.827625] E [MSGID: 106201]
>>>> [glusterd-store.c:3042:glusterd_store_retrieve_volumes] 0-management:
>>>> Unable to restore volume: c_glusterfs
>>>> [2017-05-06 03:33:39.827722] E [MSGID: 101019]
>>>> [xlator.c:428:xlator_init] 0-management: Initialization of volume
>>>> 'management' failed, review your volfile again
>>>> [2017-05-06 03:33:39.827762] E [graph.c:322:glusterfs_graph_init]
>>>> 0-management: initializing translator failed
>>>> [2017-05-06 03:33:39.827784] E [graph.c:661:glusterfs_graph_activate]
>>>> 0-graph: init failed
>>>> [2017-05-06 03:33:39.828396] W [glusterfsd.c:1238:cleanup_and_exit]
>>>> (-->/usr/sbin/glusterd(glusterfs_volumes_init-0x1b0b8) [0x1000a648]
>>>> -->/usr/sbin/glusterd(glusterfs_process_volfp-0x1b210) [0x1000a4d8]
>>>> -->/usr/sbin/glusterd(cleanup_and_exit-0x1beac) [0x100097ac] ) 0-:
>>>> received signum (0), shutting down
>>>>
>>>
>> Abhishek,
>>
>> This patch needs to be thoroughly reviewed to ensure that it doesn't
>> cause any regression given this touches on the core store management
>> functionality of glusterd. AFAICT, we get into an empty info file only when
>> volume set operation is executed and in parallel one of the glusterd
>> instance in other nodes have been brought down and whole sequence of
>> operation happens in a loop. The test case through which you can get into
>> this situation is not something you'd hit in production. Please help me to
>> understand the urgency here.
>>
>> Also in one of the earlier thread, I did mention the workaround of this
>> issue back to Xin through http://lists.gluster.org/piper
>> mail/gluster-users/2017-January/029600.html
>>
>> "If you end up in having a 0 byte info file you'd need to copy the same info file from other node and put it there and restart glusterd"
>>
>>
>>>>
>>>> I have found one of the existing case is there and also solution patch
>>>> is available but the status of that patch in "cannot merge". Also the
>>>> "info" file is empty and "info.tmp" file present in "lib/glusterd/vol"
>>>> directory.
>>>>
>>>> Below is the link of the existing case.
>>>>
>>>> https://review.gluster.org/#/c/16279/5
>>>>
>>>> please let me know what is the plan of community to provide the
>>>> solution of this problem and in which version.
>>>>
>>>> Regards
>>>> Abhishek Paliwal
>>>>
>>>
>>>
>>>
>>> --
>>>
>>>
>>>
>>>
>>> Regards
>>> Abhishek Paliwal
>>>
>>
>>
>
>
> --
>
>
>
>
> Regards
> Abhishek Paliwal
>
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