[Gluster-devel] [Gluster-users] gluster volume heal info split brain command not showing files in split-brain

[Anuradha Talur]

Hi Abhishek,

The files that are reporting i/o error have gfid-mismatch. This situation is called directory or entry split-brain. You can find steps to resolve this kind of split brain here : https://gluster.readthedocs.org/en/latest/Troubleshooting/split-brain/ .

Ideally, the parent directories of these files have to be listed in heal info split-brain output. Can you please get extended attributes of parent directories of the files that show i/o error (Same getfattr command that you previously used.) ?

----- Original Message -----
> From: "ABHISHEK PALIWAL" <abhishpaliwal at gmail.com>
> To: "Anuradha Talur" <atalur at redhat.com>
> Cc: gluster-users at gluster.org, gluster-devel at gluster.org
> Sent: Thursday, March 10, 2016 11:22:35 AM
> Subject: Re: [Gluster-users] gluster volume heal info split brain command not showing files in split-brain
> 
> Hi Anuradha,
> 
> Please find the glusterfs and glusterd logs directory as an attachment.
> 
> Regards,
> Abhishek
> 
> 
> 
> On Wed, Mar 9, 2016 at 5:54 PM, ABHISHEK PALIWAL <abhishpaliwal at gmail.com>
> wrote:
> 
> > Hi Anuradha,
> >
> > Sorry for late reply.
> >
> > Please find the requested logs below:
> >
> > Remote: 10.32.0.48
> > Local : 10.32.1.144
> >
> > Local:
> > #gluster volume heal c_glusterfs info split-brain
> > Brick 10.32.1.144:/opt/lvmdir/c2/brick
> > Number of entries in split-brain: 0
> >
> > Brick 10.32.0.48:/opt/lvmdir/c2/brick
> > Number of entries in split-brain: 0
> >
> > Remote:
> > #gluster volume heal c_glusterfs info split-brain
> > Brick 10.32.1.144:/opt/lvmdir/c2/brick
> > Number of entries in split-brain: 0
> >
> > Brick 10.32.0.48:/opt/lvmdir/c2/brick
> > Number of entries in split-brain: 0
> >
> > auto-sync.sh.
> > Here you can see that i/o error is detected. Below is the required meta
> > data from both the bricks.
> >
> > 1)
> > stat: cannot stat '/mnt/c//public_html/cello/ior_files/nameroot.ior':
> > Input/output error
> > Remote:
> >
> > getfattr -d -m . -e hex
> > opt/lvmdir/c2/brick/public_html/cello/ior_files/nameroot.ior
> > # file: opt/lvmdir/c2/brick/public_html/cello/ior_files/nameroot.ior
> > trusted.afr.dirty=0x000000000000000000000000
> > trusted.bit-rot.version=0x000000000000000256ded2f6000ad80f
> > trusted.gfid=0x771221a7bb3c4f1aade40ce9e38a95ee
> >
> > Local:
> >
> > getfattr -d -m . -e hex
> > opt/lvmdir/c2/brick/public_html/cello/ior_files/nameroot.ior
> > # file: opt/lvmdir/c2/brick/public_html/cello/ior_files/nameroot.ior
> > trusted.bit-rot.version=0x000000000000000256ded38f000e3a51
> > trusted.gfid=0x8ea33f46703c4e2d95c09153c1b858fd
> >
> >
> > 2)
> > stat: cannot stat '/mnt/c//security/corbasecurity': Input/output error
> > Remote:
> >
> > getfattr -d -m . -e hex opt/lvmdir/c2/brick/security/corbasecurity
> > # file: opt/lvmdir/c2/brick/security/corbasecurity
> > trusted.afr.dirty=0x000000000000000000000000
> > trusted.bit-rot.version=0x000000000000000256ded2f6000ad80f
> > trusted.gfid=0xd298b7a0c8834f3e99abb39741363013
> >
> > Local:
> >
> > getfattr -d -m . -e hex opt/lvmdir/c2/brick/security/corbasecurity
> > # file: opt/lvmdir/c2/brick/security/corbasecurity
> > trusted.bit-rot.version=0x000000000000000256ded38f000e3a51
> > trusted.gfid=0x890df0f706184b52803fac3242a2f15b
> >
> > I observed that getfattr command output doesn't show all the fields all
> > the times.
> >
> > Here you can check that gluster split-brain command hasn't reported any
> > split-brains but resulted in IO errors when accessed few files.
> >
> > Could you please tell me if "split-brain" command doesn't reported any
> > entry as output, then is there any way through which we can find out that
> > the files are in split-brain if we are getting the IO error on those file.
> >
> >
> > Regards,
> > Abhishek
> >
> >
> >
> > On Thu, Mar 3, 2016 at 5:32 PM, Anuradha Talur <atalur at redhat.com> wrote:
> >
> >>
> >>
> >> ----- Original Message -----
> >> > From: "ABHISHEK PALIWAL" <abhishpaliwal at gmail.com>
> >> > To: gluster-users at gluster.org, gluster-devel at gluster.org
> >> > Sent: Thursday, March 3, 2016 12:10:42 PM
> >> > Subject: [Gluster-users] gluster volume heal info split brain command
> >> not     showing files in split-brain
> >> >
> >> >
> >> > Hello,
> >> >
> >> > In gluster, we use the command "gluster volume heal c_glusterfs info
> >> > split-brain" to find the files that are in split-brain scenario.
> >> > We run heal script (developed by Windriver prime team) on the files
> >> reported
> >> > by above command to resolve split-brain issue.
> >> >
> >> > But we observed that the above command is not showing all files that
> >> are in
> >> > split-brain,
> >> > even though split brain scenario actually exists on the node.
> >> >
> >> > Now a days this issue is seen more often and IO errors are reported when
> >> > tried to access these files under split-brain.
> >> >
> >> > Can you please check why this gluster command is not showing files under
> >> > split-brain?
> >> > We can provide you required logs and support to resolve this issue.
> >> Hi,
> >>
> >> Could you paste the output of getfattr -m. -de hex
> >> <path-to-files-in-split-brain> from all the bricks that the files lie in?
> >>
> >> >
> >> > Please reply on this because I am not getting any reply from the
> >> community.
> >> >
> >> > --
> >> >
> >> > Regards
> >> > Abhishek Paliwal
> >> >
> >> > _______________________________________________
> >> > Gluster-users mailing list
> >> > Gluster-users at gluster.org
> >> > http://www.gluster.org/mailman/listinfo/gluster-users
> >>
> >> --
> >> Thanks,
> >> Anuradha.
> >>
> >
> 

-- 
Thanks,
Anuradha.