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

Anuradha Talur atalur at redhat.com
Thu Mar 17 20:11:16 UTC 2016 


----- 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 17, 2016 4:00:58 PM
> Subject: Re: [Gluster-users] gluster volume heal info split brain command not showing files in split-brain
> 
> Hi Anuradha,
> 
> Please confirm me, this is bug in glusterfs or we need to do something at
> our end.
> 
> Because this problem is stopping our development.
Hi Abhishek,

When you say file is not getting sync, do you mean that the files are not in sync after healing or that the existing GFID mismatch that you tried to heal failed?
In one of the previous mails, you said that the GFID mismatch problem is resolved, is it not so?

To your question about finding the files in split-brain, can you try running gluster volume heal <volname> info? Heal info is also supposed to show
the files in split-brain.

If the GFID mismatch is not resolved yet, it would really help understand the underlying problem if you give the output of getfattr -m. -de hex <path-to-parent-directory-of-the-file-in-GFID-mismatch>.
> 
> Regards,
> Abhishek
> 
> On Thu, Mar 17, 2016 at 1:54 PM, ABHISHEK PALIWAL <abhishpaliwal at gmail.com>
> wrote:
> 
> > Hi Anuradha,
> >
> > But in this case I need to do tail on each file which is time taking
> > process and other end I can't pause my module until these file is getting
> > healed.
> >
> > Any how I need the output of the split-brain to resolve this problem.
> >
> > Regards,
> > Abhishek
> >
> > On Wed, Mar 16, 2016 at 6:21 PM, ABHISHEK PALIWAL <abhishpaliwal at gmail.com
> > > wrote:
> >
> >> Hi Anuradha,
> >>
> >> The issue is resolved but we have one more issue something similar to
> >> this one in which the file is not getting sync after the steps followed,
> >> mentioned in the link which you shared in the previous mail.
> >>
> >> And problem is that why split-brain command is not showing split-brain
> >> entries.
> >>
> >> Regards,
> >> Abhishek
> >>
> >> On Wed, Mar 16, 2016 at 6:06 PM, Anuradha Talur <atalur at redhat.com>
> >> wrote:
> >>
> >>>
> >>>
> >>> ----- Original Message -----
> >>> > From: "Anuradha Talur" <atalur at redhat.com>
> >>> > To: "ABHISHEK PALIWAL" <abhishpaliwal at gmail.com>
> >>> > Cc: gluster-users at gluster.org, gluster-devel at gluster.org
> >>> > Sent: Wednesday, March 16, 2016 5:32:26 PM
> >>> > Subject: Re: [Gluster-users] gluster volume heal info split brain
> >>> command not showing files in split-brain
> >>> >
> >>> >
> >>> >
> >>> > ----- 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: Wednesday, March 16, 2016 4:39:26 PM
> >>> > > Subject: Re: [Gluster-users] gluster volume heal info split brain
> >>> command
> >>> > > not showing files in split-brain
> >>> > >
> >>> > > Hi Anuradha,
> >>> > >
> >>> > > I am doing the same which is mentioned in the link you shared and It
> >>> has
> >>> > > been resolved the issue.
> >>> > >
> >>> > > But my question is if it is the split-brain scenario then why the
> >>> command
> >>> > > "gluster volume heal info split-brain"
> >>> > >  not showing these files in the output even not the parent directory
> >>> is
> >>> > > present in split-brain.
> >>> > >
> >>> > > Please find the requested logs
> >>>
> >>> Abhishek,
> >>>
> >>> Yes, ideally it should show. I will look into it. The only reason I can
> >>> think of, is when parent directory did not have any pending markers to
> >>> indicate split-brain; which is why I asked getfattr output for the parent
> >>> directory too. But if the issue is resolved, there isn't much info we can
> >>> get out of it. Thanks for sharing the logs. Will see what could have
> >>> caused
> >>> this.
> >>>
> >>> > Abhishek,
> >>> >
> >>> > Yes, ideally it should show. I will look into it.
> >>> > I saw another case with this issue. The parent directory did not have
> >>> any pe
> >>> > >
> >>> > > On Wed, Mar 16, 2016 at 4:20 PM, Anuradha Talur <atalur at redhat.com>
> >>> wrote:
> >>> > >
> >>> > > > 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.
> >>> > > >
> >>> > >
> >>> > >
> >>> > >
> >>> > > --
> >>> > >
> >>> > >
> >>> > >
> >>> > >
> >>> > > Regards
> >>> > > Abhishek Paliwal
> >>> > >
> >>> >
> >>> > --
> >>> > Thanks,
> >>> > Anuradha.
> >>> >
> >>>
> >>> --
> >>> Thanks,
> >>> Anuradha.
> >>>
> >>
> >>
> >>
> >> --
> >>
> >>
> >>
> >>
> >> Regards
> >> Abhishek Paliwal
> >>
> >
> >
> >
> > --
> >
> >
> >
> >
> > Regards
> > Abhishek Paliwal
> >
> 
> 
> 
> --
> 
> 
> 
> 
> Regards
> Abhishek Paliwal
> 

-- 
Thanks,
Anuradha.

More information about the Gluster-users mailing list