[Gluster-devel] Another segfault on client side (only sporadic)

[Bernhard J. M. Grün]

I still have the core dump of the crash I've reported. But I don't
know if the backtrace is the same every time. The glusterfs client now
runs perfectly since 2007-08-16. So we have to wait for the next crash
to analyse that issue further.
Also the "print child_errno" does not output anything useful. It just
says that there is no symbol with that name in the current context.

2007/8/20, Krishna Srinivas <krishna at zresearch.com>:
> Do you see the same backtrace everytime it crashes?
> can you do "print child_errno" at the gdb prompt when you have the core?
>
> Thanks
> Krishna
>
> On 8/20/07, Bernhard J. M. Grün <bernhard.gruen at googlemail.com> wrote:
> > Hi Krishna,
> >
> > One or also both of our glusterfs clients with that version crash
> > every 3 to 5 days I think. The problem is that there is much
> > throughput (about 30MBit/s on each client with about 99.5% file reads,
> > rest file writes). This makes it hard to debug.
> > We also have a core file from that crash (If I did not deleted it
> > because it was quite big) anyway when the next crash occurs I'll save
> > the core dump for sure.
> > Do you have some idea how to work around that crash?
> > .
> > 2007/8/20, Krishna Srinivas <krishna at zresearch.com>:
> > > Hi Bernhard,
> > >
> > > Sorry for the late response. We are not able to figure out
> > > the cause for this bug. Do you have the core file?
> > > Is the bug seen regularly?
> > >
> > > Thanks
> > > Krishna
> > >
> > > On 8/16/07, Bernhard J. M. Grün <bernhard.gruen at googlemail.com> wrote:
> > > > Hello developers,
> > > >
> > > > We just discovered another segfault on client side. At the moment we
> > > > can't give you more information than our version number, a back trace
> > > > and our client configuration.
> > > >
> > > > We use version 1.3.0 with patches up to patch-449.
> > > >
> > > > The back trace looks as the follows:
> > > > Core was generated by `[glusterfs]
> > > >                               '.
> > > > Program terminated with signal 11, Segmentation fault.
> > > > #0  0x00002aaaaacbc2bd in afr_stat (frame=0x2aaabce32cb0,
> > > >     this=<value optimized out>, loc=0x2aaaac0fe168) at afr.c:2602
> > > > 2602    afr.c: No such file or directory.
> > > >         in afr.c
> > > > (gdb) bt
> > > > #0  0x00002aaaaacbc2bd in afr_stat (frame=0x2aaabce32cb0,
> > > >     this=<value optimized out>, loc=0x2aaaac0fe168) at afr.c:2602
> > > > #1  0x00002aaaaaece1bb in iot_stat (frame=0x2aaabcc00860, this=0x6126d0,
> > > >     loc=0x2aaaac0fe168) at io-threads.c:651
> > > > #2  0x00002aaaab0d2252 in wb_stat (frame=0x2aaaad05c5e0, this=0x612fe0,
> > > >     loc=0x2aaaac0fe168) at write-behind.c:236
> > > > #3  0x0000000000405fd2 in fuse_getattr (req=<value optimized out>,
> > > >     ino=<value optimized out>, fi=<value optimized out>) at fuse-bridge.c:496
> > > > #4  0x0000000000407139 in fuse_transport_notify (xl=<value optimized out>,
> > > >     event=<value optimized out>, data=<value optimized out>)
> > > >     at fuse-bridge.c:2067
> > > > #5  0x00002af562b6a632 in sys_epoll_iteration (ctx=<value optimized out>)
> > > >     at epoll.c:53
> > > > #6  0x000000000040356b in main (argc=9, argv=0x7fff48169b78) at glusterfs.c:387
> > > >
> > > > And here is our client configuration for that machine:
> > > > ### Add client feature and attach to remote subvolume
> > > > volume client1
> > > >   type protocol/client
> > > >   option transport-type tcp/client     # for TCP/IP transport
> > > >   option remote-host 10.1.1.13     # IP address of the remote brick
> > > >   option remote-port 9999              # default server port is 6996
> > > >   option remote-subvolume iothreads        # name of the remote volume
> > > > end-volume
> > > >
> > > > ### Add client feature and attach to remote subvolume
> > > > volume client2
> > > >   type protocol/client
> > > >   option transport-type tcp/client     # for TCP/IP transport
> > > >   option remote-host 10.1.1.14     # IP address of the remote brick
> > > >   option remote-port 9999              # default server port is 6996
> > > >   option remote-subvolume iothreads        # name of the remote volume
> > > > end-volume
> > > >
> > > > volume afrbricks
> > > >   type cluster/afr
> > > >   subvolumes client1 client2
> > > >   option replicate *:2
> > > >   option self-heal off
> > > > end-volume
> > > >
> > > > volume iothreads    #iothreads can give performance a boost
> > > >    type performance/io-threads
> > > >    option thread-count 16
> > > >    subvolumes afrbricks
> > > > end-volume
> > > >
> > > > ### Add writeback feature
> > > > volume bricks
> > > >   type performance/write-behind
> > > >   option aggregate-size 0  # unit in bytes
> > > >   subvolumes iothreads
> > > > end-volume
> > > >
> > > >
> > > > We hope you can easily find and fix that error. Thank you in advance
> > > >
> > > > Bernhard J. M. Grün
> > > >
> > > >
> > > > _______________________________________________
> > > > Gluster-devel mailing list
> > > > Gluster-devel at nongnu.org
> > > > http://lists.nongnu.org/mailman/listinfo/gluster-devel
> > > >
> > >
> >
> >
> > --
> > Viele Grüße
> > Bernhard J. M. Grün
> >
>


-- 
Viele Grüße
Bernhard J. M. Grün