[Gluster-users] GlusterFS mount crash

Xavi Hernandez jahernan at redhat.com
Mon Nov 21 14:15:50 UTC 2022 

Hi Angel,

On Mon, Nov 21, 2022 at 2:33 PM Angel Docampo <angel.docampo at eoniantec.com>
wrote:

> Sorry for necrobumping this, but this morning I've suffered this on my
> Proxmox  + GlusterFS cluster. In the log I can see this
>
> [2022-11-21 07:38:00.213620 +0000] I [MSGID: 133017]
> [shard.c:7275:shard_seek] 11-vmdata-shard: seek called on
> fbc063cb-874e-475d-b585-f89
> f7518acdd. [Operation not supported]
> pending frames:
> frame : type(1) op(WRITE)
> frame : type(0) op(0)
> frame : type(0) op(0)
> frame : type(0) op(0)
> frame : type(0) op(0)
> frame : type(0) op(0)
> frame : type(0) op(0)
> frame : type(0) op(0)
> frame : type(0) op(0)
> frame : type(0) op(0)
> frame : type(0) op(0)
> frame : type(0) op(0)
> frame : type(0) op(0)
> frame : type(0) op(0)
> frame : type(0) op(0)
> frame : type(0) op(0)
> frame : type(0) op(0)
> ...
> frame : type(1) op(FSYNC)
> frame : type(1) op(FSYNC)
> frame : type(1) op(FSYNC)
> frame : type(1) op(FSYNC)
> frame : type(1) op(FSYNC)
> frame : type(1) op(FSYNC)
> frame : type(1) op(FSYNC)
> frame : type(1) op(FSYNC)
> frame : type(1) op(FSYNC)
> frame : type(1) op(FSYNC)
> frame : type(1) op(FSYNC)
> frame : type(1) op(FSYNC)
> frame : type(1) op(FSYNC)
> frame : type(1) op(FSYNC)
> frame : type(1) op(FSYNC)
> frame : type(1) op(FSYNC)
> frame : type(1) op(FSYNC)
> frame : type(1) op(FSYNC)
> frame : type(1) op(FSYNC)
> frame : type(1) op(FSYNC)
> patchset: git://git.gluster.org/glusterfs.git
> signal received: 11
> time of crash:
> 2022-11-21 07:38:00 +0000
> configuration details:
> argp 1
> backtrace 1
> dlfcn 1
> libpthread 1
> llistxattr 1
> setfsid 1
> epoll.h 1
> xattr.h 1
> st_atim.tv_nsec 1
> package-string: glusterfs 10.3
> /lib/x86_64-linux-gnu/libglusterfs.so.0(+0x28a54)[0x7f74f286ba54]
> /lib/x86_64-linux-gnu/libglusterfs.so.0(gf_print_trace+0x700)[0x7f74f2873fc0]
>
> /lib/x86_64-linux-gnu/libc.so.6(+0x38d60)[0x7f74f262ed60]
> /usr/lib/x86_64-linux-gnu/glusterfs/10.3/xlator/cluster/disperse.so(+0x37a14)[0x7f74ecfcea14]
>
> /usr/lib/x86_64-linux-gnu/glusterfs/10.3/xlator/cluster/disperse.so(+0x19414)[0x7f74ecfb0414]
>
> /usr/lib/x86_64-linux-gnu/glusterfs/10.3/xlator/cluster/disperse.so(+0x16373)[0x7f74ecfad373]
>
> /usr/lib/x86_64-linux-gnu/glusterfs/10.3/xlator/cluster/disperse.so(+0x21d59)[0x7f74ecfb8d59]
>
> /usr/lib/x86_64-linux-gnu/glusterfs/10.3/xlator/cluster/disperse.so(+0x22815)[0x7f74ecfb9815]
>
> /usr/lib/x86_64-linux-gnu/glusterfs/10.3/xlator/cluster/disperse.so(+0x377d9)[0x7f74ecfce7d9]
>
> /usr/lib/x86_64-linux-gnu/glusterfs/10.3/xlator/cluster/disperse.so(+0x19414)[0x7f74ecfb0414]
>
> /usr/lib/x86_64-linux-gnu/glusterfs/10.3/xlator/cluster/disperse.so(+0x16373)[0x7f74ecfad373]
>
> /usr/lib/x86_64-linux-gnu/glusterfs/10.3/xlator/cluster/disperse.so(+0x170f9)[0x7f74ecfae0f9]
>
> /usr/lib/x86_64-linux-gnu/glusterfs/10.3/xlator/cluster/disperse.so(+0x313bb)[0x7f74ecfc83bb]
>
> /usr/lib/x86_64-linux-gnu/glusterfs/10.3/xlator/protocol/client.so(+0x48e3a)[0x7f74ed06ce3a]
>
> /lib/x86_64-linux-gnu/libgfrpc.so.0(+0xfccb)[0x7f74f2816ccb]
> /lib/x86_64-linux-gnu/libgfrpc.so.0(rpc_transport_notify+0x26)[0x7f74f2812646]
>
> /usr/lib/x86_64-linux-gnu/glusterfs/10.3/rpc-transport/socket.so(+0x64c8)[0x7f74ee15f4c8]
>
> /usr/lib/x86_64-linux-gnu/glusterfs/10.3/rpc-transport/socket.so(+0xd38c)[0x7f74ee16638c]
>
> /lib/x86_64-linux-gnu/libglusterfs.so.0(+0x7971d)[0x7f74f28bc71d]
> /lib/x86_64-linux-gnu/libpthread.so.0(+0x7ea7)[0x7f74f27d2ea7]
> /lib/x86_64-linux-gnu/libc.so.6(clone+0x3f)[0x7f74f26f2aef]
> ---------
> The mount point wasn't accessible with the "Transport endpoint is not
> connected" message and it was shown like this.
> d?????????   ? ?    ?            ?            ? vmdata
>
> I had to stop all the VMs on that proxmox node, then stop the gluster
> daemon to ummount de directory, and after starting the daemon and
> re-mounting, all was working again.
>
> My gluster volume info returns this
>
> Volume Name: vmdata
> Type: Distributed-Disperse
> Volume ID: cace5aa4-b13a-4750-8736-aa179c2485e1
> Status: Started
> Snapshot Count: 0
> Number of Bricks: 2 x (2 + 1) = 6
> Transport-type: tcp
> Bricks:
> Brick1: g01:/data/brick1/brick
> Brick2: g02:/data/brick2/brick
> Brick3: g03:/data/brick1/brick
> Brick4: g01:/data/brick2/brick
> Brick5: g02:/data/brick1/brick
> Brick6: g03:/data/brick2/brick
> Options Reconfigured:
> nfs.disable: on
> transport.address-family: inet
> storage.fips-mode-rchecksum: on
> features.shard: enable
> features.shard-block-size: 256MB
> performance.read-ahead: off
> performance.quick-read: off
> performance.io-cache: off
> server.event-threads: 2
> client.event-threads: 3
> performance.client-io-threads: on
> performance.stat-prefetch: off
> dht.force-readdirp: off
> performance.force-readdirp: off
> network.remote-dio: on
> features.cache-invalidation: on
> performance.parallel-readdir: on
> performance.readdir-ahead: on
>
> Xavi, do you think the open-behind off setting can help somehow? I did try
> to understand what it does (with no luck), and if it could impact the
> performance of my VMs (I've the setup you know so well ;))
> I would like to avoid more crashings like this, version 10.3 of gluster
> was working since two weeks ago, quite well until this morning.
>

I don't think disabling open-behind will have any visible effect on
performance. Open-behind is only useful for small files when the workload
is mostly open + read + close, and quick-read is also enabled (which is not
your case). The only effect it will have is that the latency "saved" during
open is "paid" on the next operation sent to the file, so the total overall
latency should be the same. Additionally, VM workload doesn't open files
frequently, so it shouldn't matter much in any case.

That said, I'm not sure if the problem is the same in your case. Based on
the stack of the crash, it seems an issue inside the disperse module.

What OS are you using ? are you using official packages ?  if so, which
ones ?

Is it possible to provide a backtrace from gdb ?

Regards,

Xavi


> *Angel Docampo*
>
> <https://www.google.com/maps/place/Edificio+de+Oficinas+Euro+3/@41.3755943,2.0730134,17z/data=!3m2!4b1!5s0x12a4997021aad323:0x3e06bf8ae6d68351!4m5!3m4!1s0x12a4997a67bf592f:0x83c2323a9cc2aa4b!8m2!3d41.3755903!4d2.0752021>
>   <angel.docampo at eoniantec.com>  <+34-93-1592929>
>
>
> El vie, 19 mar 2021 a las 2:10, David Cunningham (<
> dcunningham at voisonics.com>) escribió:
>
>> Hi Xavi,
>>
>> Thank you for that information. We'll look at upgrading it.
>>
>>
>> On Fri, 12 Mar 2021 at 05:20, Xavi Hernandez <jahernan at redhat.com> wrote:
>>
>>> Hi David,
>>>
>>> with so little information it's hard to tell, but given that there are
>>> several OPEN and UNLINK operations, it could be related to an already fixed
>>> bug (in recent versions) in open-behind.
>>>
>>> You can try disabling open-behind with this command:
>>>
>>>     # gluster volume set <volname> open-behind off
>>>
>>> But given the version you are using is very old and unmaintained, I
>>> would recommend you to upgrade to 8.x at least.
>>>
>>> Regards,
>>>
>>> Xavi
>>>
>>>
>>> On Wed, Mar 10, 2021 at 5:10 AM David Cunningham <
>>> dcunningham at voisonics.com> wrote:
>>>
>>>> Hello,
>>>>
>>>> We have a GlusterFS 5.13 server which also mounts itself with the
>>>> native FUSE client. Recently the FUSE mount crashed and we found the
>>>> following in the syslog. There isn't anything logged in mnt-glusterfs.log
>>>> for that time. After killing all processes with a file handle open on the
>>>> filesystem we were able to unmount and then remount the filesystem
>>>> successfully.
>>>>
>>>> Would anyone have advice on how to debug this crash? Thank you in
>>>> advance!
>>>>
>>>> Mar 9 05:12:31 voip1 mnt-glusterfs[2932]: pending frames:
>>>> Mar 9 05:12:31 voip1 mnt-glusterfs[2932]: frame : type(0) op(0)
>>>> Mar 9 05:12:31 voip1 mnt-glusterfs[2932]: frame : type(0) op(0)
>>>> Mar 9 05:12:31 voip1 mnt-glusterfs[2932]: frame : type(1) op(UNLINK)
>>>> Mar 9 05:12:31 voip1 mnt-glusterfs[2932]: frame : type(1) op(UNLINK)
>>>> Mar 9 05:12:31 voip1 mnt-glusterfs[2932]: frame : type(1) op(OPEN)
>>>> Mar 9 05:12:31 voip1 mnt-glusterfs[2932]: message repeated 3355 times:
>>>> [ frame : type(1) op(OPEN)]
>>>> Mar 9 05:12:31 voip1 mnt-glusterfs[2932]: frame : type(1) op(OPEN)
>>>> Mar 9 05:12:31 voip1 mnt-glusterfs[2932]: message repeated 6965 times:
>>>> [ frame : type(1) op(OPEN)]
>>>> Mar 9 05:12:31 voip1 mnt-glusterfs[2932]: frame : type(1) op(OPEN)
>>>> Mar 9 05:12:31 voip1 mnt-glusterfs[2932]: message repeated 4095 times:
>>>> [ frame : type(1) op(OPEN)]
>>>> Mar 9 05:12:31 voip1 mnt-glusterfs[2932]: frame : type(0) op(0)
>>>> Mar 9 05:12:31 voip1 mnt-glusterfs[2932]: patchset: git://
>>>> git.gluster.org/glusterfs.git
>>>> Mar 9 05:12:31 voip1 mnt-glusterfs[2932]: signal received: 11
>>>> Mar 9 05:12:31 voip1 mnt-glusterfs[2932]: time of crash:
>>>> Mar 9 05:12:31 voip1 mnt-glusterfs[2932]: 2021-03-09 03:12:31
>>>> Mar 9 05:12:31 voip1 mnt-glusterfs[2932]: configuration details:
>>>> Mar 9 05:12:31 voip1 mnt-glusterfs[2932]: argp 1
>>>> Mar 9 05:12:31 voip1 mnt-glusterfs[2932]: backtrace 1
>>>> Mar 9 05:12:31 voip1 mnt-glusterfs[2932]: dlfcn 1
>>>> Mar 9 05:12:31 voip1 mnt-glusterfs[2932]: libpthread 1
>>>> Mar 9 05:12:31 voip1 mnt-glusterfs[2932]: llistxattr 1
>>>> Mar 9 05:12:31 voip1 mnt-glusterfs[2932]: setfsid 1
>>>> Mar 9 05:12:31 voip1 mnt-glusterfs[2932]: spinlock 1
>>>> Mar 9 05:12:31 voip1 mnt-glusterfs[2932]: epoll.h 1
>>>> Mar 9 05:12:31 voip1 mnt-glusterfs[2932]: xattr.h 1
>>>> Mar 9 05:12:31 voip1 mnt-glusterfs[2932]: st_atim.tv_nsec 1
>>>> Mar 9 05:12:31 voip1 mnt-glusterfs[2932]: package-string: glusterfs 5.13
>>>> Mar 9 05:12:31 voip1 mnt-glusterfs[2932]: ---------
>>>> ...
>>>> Mar 9 05:13:50 voip1 systemd[1]: glusterfssharedstorage.service: Main
>>>> process exited, code=killed, status=11/SEGV
>>>> Mar 9 05:13:50 voip1 systemd[1]: glusterfssharedstorage.service: Failed
>>>> with result 'signal'.
>>>> ...
>>>> Mar 9 05:13:54 voip1 systemd[1]: glusterfssharedstorage.service:
>>>> Service hold-off time over, scheduling restart.
>>>> Mar 9 05:13:54 voip1 systemd[1]: glusterfssharedstorage.service:
>>>> Scheduled restart job, restart counter is at 2.
>>>> Mar 9 05:13:54 voip1 systemd[1]: Stopped Mount glusterfs sharedstorage.
>>>> Mar 9 05:13:54 voip1 systemd[1]: Starting Mount glusterfs
>>>> sharedstorage...
>>>> Mar 9 05:13:54 voip1 mount-shared-storage.sh[20520]: ERROR: Mount point
>>>> does not exist
>>>> Mar 9 05:13:54 voip1 mount-shared-storage.sh[20520]: Please specify a
>>>> mount point
>>>> Mar 9 05:13:54 voip1 mount-shared-storage.sh[20520]: Usage:
>>>> Mar 9 05:13:54 voip1 mount-shared-storage.sh[20520]: man 8
>>>> /sbin/mount.glusterfs
>>>>
>>>> --
>>>> David Cunningham, Voisonics Limited
>>>> http://voisonics.com/
>>>> USA: +1 213 221 1092
>>>> New Zealand: +64 (0)28 2558 3782
>>>> ________
>>>>
>>>>
>>>>
>>>> Community Meeting Calendar:
>>>>
>>>> Schedule -
>>>> Every 2nd and 4th Tuesday at 14:30 IST / 09:00 UTC
>>>> Bridge: https://meet.google.com/cpu-eiue-hvk
>>>> Gluster-users mailing list
>>>> Gluster-users at gluster.org
>>>> https://lists.gluster.org/mailman/listinfo/gluster-users
>>>>
>>>
>>
>> --
>> David Cunningham, Voisonics Limited
>> http://voisonics.com/
>> USA: +1 213 221 1092
>> New Zealand: +64 (0)28 2558 3782
>> ________
>>
>>
>>
>> Community Meeting Calendar:
>>
>> Schedule -
>> Every 2nd and 4th Tuesday at 14:30 IST / 09:00 UTC
>> Bridge: https://meet.google.com/cpu-eiue-hvk
>> Gluster-users mailing list
>> Gluster-users at gluster.org
>> https://lists.gluster.org/mailman/listinfo/gluster-users
>>
>
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