[Gluster-devel] AFR: machine crash hangs other mountsortransportendpoint not connected

Anand Avati avati at zresearch.com
Wed Apr 30 14:52:26 UTC 2008


Chris,
 can you get the glusterfs client logs from your ramdisk when the servers
are being pulled out and tried to access the mount point?

avati

2008/4/30 Christopher Hawkins <chawkins at veracitynetworks.com>:

> Without. All that is removed...
>
>
>  _____
>
> From: anand.avati at gmail.com [mailto:anand.avati at gmail.com] On Behalf Of
> Anand Avati
> Sent: Wednesday, April 30, 2008 10:24 AM
> To: Christopher Hawkins
> Cc: gluster-devel at nongnu.org
> Subject: Re: [Gluster-devel] AFR: machine crash hangs other
> mountsortransportendpoint not connected
>
>
> Chris,
>  is this hang with IP failover in place or without?
>
> avati
>
>
> 2008/4/30 Christopher Hawkins <chawkins at veracitynetworks.com>:
>
>
>
> Gluster devs,
>
> I am still not able to keep the client from hanging in a diskless cluster
> node. When I fail a server the client becomes unresponsive and does not
> read
> from the other AFR volume. I first moved the entire /lib and /bin and
> /sbin
> directories into the ramdisk which runs the nodes to rule out the simple
> loss of an odd binary or library... An lsof | grep gluster on the client
> (pre-failover test) shows:
>
> [root at node1 ~]# lsof |grep gluster
> glusterfs 2195   root  cwd       DIR        0,1        0         2 /
> glusterfs 2195   root  rtd       DIR        0,1        0         2 /
> glusterfs 2195   root  txt       REG        0,1    55592      3863
> /bin/glusterfs
> glusterfs 2195   root  mem       REG        0,1   341068      2392
> /lib/libfuse.so.2.7.2
> glusterfs 2195   root  mem       REG        0,1   118096      2505
> /lib/glusterfs/1.3.8pre6/xlator/mount/fuse.so
> glusterfs 2195   root  mem       REG        0,1   164703      2514
> /lib/glusterfs/1.3.8pre6/xlator/protocol/client.so
> glusterfs 2195   root  mem       REG        0,1   112168        77
> /lib/ld-2.3.4.so
> glusterfs 2195   root  mem       REG        0,1  1529120      2483
> /lib/tls/libc-2.3.4.so
> glusterfs 2195   root  mem       REG        0,1    16732        70
> /lib/libdl-2.3.4.so
> glusterfs 2195   root  mem       REG        0,1   107800      2485
> /lib/tls/libpthread-2.3.4.so
> glusterfs 2195   root  mem       REG        0,1    43645      2533
> /lib/glusterfs/1.3.8pre6/transport/tcp/client.so
> glusterfs 2195   root  mem       REG        0,1   427763      2456
> /lib/libglusterfs.so.0.0.0
> glusterfs 2195   root  mem       REG        0,1    50672      2474
> /lib/tls/librt-2.3.4.so
> glusterfs 2195   root  mem       REG        0,1   245686      2522
> /lib/glusterfs/1.3.8pre6/xlator/cluster/afr.so
> glusterfs 2195   root    0u      CHR        1,3               3393
> /dev/null
> glusterfs 2195   root    1u      CHR        1,3               3393
> /dev/null
> glusterfs 2195   root    2u      CHR        1,3               3393
> /dev/null
> glusterfs 2195   root    3w      REG        0,1      102      4495
> /var/log/glusterfs/glusterfs.log
> glusterfs 2195   root    4u      CHR     10,229               3494
> /dev/fuse
> glusterfs 2195   root    5r     0000        0,8        0      4498
> eventpoll
> glusterfs 2195   root    6u     IPv4       4499                TCP
> 192.168.20.155:1023->master1:6996 (ESTABLISHED)
> glusterfs 2195   root    7u     IPv4       4500                TCP
> 192.168.20.155:1022->master2:6996 (ESTABLISHED)
>
> Everything listed here is a local file and the gluster binary has access
> to
> them during failover. Can you help me troubleshoot by explaining what
> exactly gluster is doing when it loses a connection? Does it depend on
> something I have missed? This failover test uses the same config files and
> binaries that my earlier tests use (which succeeded, but were not run on a
> diskless node). There must be something else in the filesystem that
> glusterfs requires to failover successfully?
>
> Thanks,
> Chris
>
>
> > > >
> > > >
> > > > > Gerry, Christopher,
> > > > >
> > > > > Here is what I tried to do. Two servers, one client, simple
> > > > setup, afr
> > > > > on the client side. I did "ls" on client mount point, it
> > > > works, now I
> > > > > do "ifconfig eth0 down"
> > > > > on the server, next I do "ls" on client, it hangs for 10
> > > > secs (timeout
> > > > > value) and fails over and starts working again without
> > > any problem.
> > > > >
> > > > > I guess few users are facing the problem you guys are facing.
> > > > > Can you give us your setup details and mention the
> > exact steps to
> > > > > reproduce. Also try to come up with minimal config details
> > > > which can
> > > > > still reproduce the problem
> > > > >
> > > > > Thanks!
> > > > > Krishna
> > > > >
> > > > > On Sat, Apr 26, 2008 at 7:01 AM, Christopher Hawkins
> > > > > <chawkins at veracitynetworks.com> wrote:
> > > > > > I am having the same issue. I'm working on a diskless
> > > > node cluster
> > > > > > and figured the issue was related to that  since AFR
> > > > seems to fail
> > > > > > over nicely for everyone else...
> > > > > >  But it seems I am not alone, so what can I do to help
> > > > troubleshoot?
> > > > > >
> > > > > >  I have two servers exporting a brick each, and a
> > > client mounting
> > > > > > them both with AFR and no unify. Transport timeout
> > > > settings  don't
> > > > > > seem to make a difference - client is just hung if I
> > > > power off  or
> > > > > > just stop glusterfsd. There is nothing logged on the
> > > server side.
> > > > > >  I'll use a usb thumb drive for client side logging since
> > > > > any logs in
> > > > > > the ramdisk obviously disappear after the reboot which
> > > > > fixes the hang...
> > > > > >  If I get any insight from this I'll report it asap.
> > > > > >
> > > > > >  Thanks,
> > > > > >  Chris
> > > > > >
> > > > > >
> > > > > >
> > > >
> > > >
> > > >
> > > > _______________________________________________
> > > > Gluster-devel mailing list
> > > > Gluster-devel at nongnu.org
> > > > http://lists.nongnu.org/mailman/listinfo/gluster-devel
> > > >
> > >
> > >
> > >
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> > >
> >
> >
> >
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> --
> If I traveled to the end of the rainbow
> As Dame Fortune did intend,
> Murphy would be there to tell me
> The pot's at the other end.
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-- 
If I traveled to the end of the rainbow
As Dame Fortune did intend,
Murphy would be there to tell me
The pot's at the other end.



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