linux-ext4 - Re: Reg: logical volume file system is getting corrupted after multiple reboots.

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Date:   Fri, 18 May 2018 15:19:33 +0530
From:   RAJESH DASARI <raajeshdasari@...il.com>
To:     Andreas Dilger <adilger@...ger.ca>
Cc:     Eric Sandeen <sandeen@...hat.com>, linux-ext4@...r.kernel.org
Subject: Re: Reg: logical volume file system is getting corrupted after
 multiple reboots.

Thanks,
Rajesh Dasari.


On Thu, May 3, 2018 at 1:40 AM, Andreas Dilger <adilger@...ger.ca> wrote:
> On May 2, 2018, at 10:26 AM, RAJESH DASARI <raajeshdasari@...il.com> wrote:
>> On Tue, May 1, 2018 at 6:15 PM, Eric Sandeen <esandeen@...hat.com> wrote:
>>> On 4/30/18 1:27 PM, RAJESH DASARI wrote:
>>>> Hi ,
>>>>
>>>> We are noticing an issue with logical volume file system is getting
>>>> corrupted after restarting the machine for multiple times.
>>>
>>> When you say restarting, are you talking about clean reboots, or
>>> power fails etc that may replay the log?
>>
>> It is clean reboot. no power failures.
>>
>>> (Also note that for a while at least on Fedora, systemd was preventing
>>> the root filesystem from unmounting cleanly on reboot.)
>>>
>>> So, were these log-replay-inducing machine restarts or "clean" reboots?
>>>
>>>> This issue we have started noticing after upgrading the kernel to 4.4.121.
>>>
>>> What was the previous kernel that did not seem to exhibit the problem?
>>
>> we have upgraded from 4.4.106 to 4.4.121 and e2fsprogs from 1.43.9 to
>> 1.44.0. After the upgrade this issue is noticed.
>>
>> Now I have downgraded the kernel to 4.4.106 and downgraded e2fsprogs
>> to 1.43.9 and issue is disappeared.
>
> If that is the case, please try the newer kernel and e2fsprogs independently to isolate which one introduced the problem.  Next, do a git-bisect on the relevant code to isolate it to a specific patch.
>
I tried it independently and noticed that it is the issue with the
e2fsprogs version 1.44.0 .  I downgraded to 1.43.9 and issue is
disappeared.  Is it any known issue in e2fsprogs? does the latest
version of
e2fsprogs contains any fixes for similar issues. Please provide your inputs.

> Cheers, Andreas
>
>>> If this happens again, capturing the primary super in some way (i.e.
>>> e2image, or even simply using dd to copy it) might be interesting, to see
>>> exactly what the corruption is.
>>>
>> I tried capturing the primary super block using dd command to some
>> file, but still i get the same error when i do dumpe2fs on the file.
>>> -Eric
>>>
>>>> while running tune2fs -c 1 /dev/VG_NEW/state to set the
>>>> mmax_mounts_count we are noticing the error.
>>>>
>>>> tune2fs -c 1 /dev/VG_NEW/state
>>>> tune2fs 1.44.0 (7-Mar-2018)
>>>> tune2fs: The ext2 superblock is corrupt while trying to open /dev/VG_NEW/state
>>>> Couldn't find valid filesystem superblock.
>>>>
>>>> lvs command output is below (there are other logical volumes and
>>>> volume groups also along with state volume, I have not pasted them to
>>>> minimize this post).
>>>> Important thing to note here is always state volume only is getting
>>>> corrupted and no file system corruption seen on other logical volumes.
>>>
>
>
> Cheers, Andreas
>
>
>
>
>