Re: [Gluster-devel] Segfault

[Krishna Srinivas]

Hi Kevan,

A volume can not have two parents. Both a-ds and b-ds have
afr1 and afr2 as parents. You could use different names for
afr2's children, though the connection going to the same storage
as a-ds b-ds. This is because translators store data in data
structures shared across the translators using the volume name
as the key. So this key has to be unique.

If unify sees more than one file amongst its children, it returns
EIO for  that particular file. Let us know how it behaves though.

Regards
Krishna

On 10/17/07, Kevan Benson <address@hidden> wrote:
>
> Another test configuration, another segfault.  ;)  Admittedly, I'd doing
> some odd stuff, like dual afr membership like so on the client:
> afr-ns = a-ns, b-ns
> afr1 = a-ds, b-ds
> afr1 = b-ds, a-ds
> unify = afr1, afr2 / ns = afr-ns
>
> Servers simply export a namespace (ns) and a posix-locked share (ds).
>
> Clients and servers start fine, any access from the client causes both
> servers to segfault as below.
>
> Yes, I'm aware this may not be a supported configuration, I just figured
> I'd try, and then see how locking worked (as I can see there might be a
> posix locking problem with this if it doesn't segfault).
>
> fuse glfs4
> glusterfs tla 522
>
> backtrace:
> #0  0x00a37546 in pthread_spin_lock () from /lib/tls/libpthread.so.0
> #1  0x005a6853 in fd_destroy (fd=0xb7e00d40) at xlator.c:282
> #2  0x0011f35a in server_closedir_cbk (frame=0xb7e00b68,
> cookie=0xb7e005b8, this=0x9ae5088, op_ret=0, op_errno=17) at
> server-protocol.c:976
> #3  0x005a8389 in default_closedir_cbk (frame=0xaaaaaaaa,
> cookie=0xb7e004b0, this=0x9ae4a88, op_ret=0, op_errno=17) at defaults.c:986
> #4  0x00112cd4 in posix_closedir (frame=0xb7e004b0, this=0x9ae44f8,
> fd=0xb7e00d40) at posix.c:287
> #5  0x005a8415 in default_closedir (frame=0xb7e005b8, this=0x9ae4a88,
> fd=0xb7e00d40) at defaults.c:997
> #6  0x00123684 in server_closedir (frame=0xb7e00b68, bound_xl=0x9ae4a88,
> params=0xb7e005f0) at server-protocol.c:3968
> #7  0x00126b13 in notify (this=0x9ae5088, event=2, data=0x9b1daa8) at
> server-protocol.c:5637
> #8  0x005aa7d8 in transport_notify (this=0x9b1daa8, event=1) at
> transport.c:154
> #9  0x005aafa1 in sys_epoll_iteration (ctx=0xbff7ef20) at epoll.c:53
> #10 0x005aaac5 in poll_iteration (ctx=0xbff7ef20) at transport.c:300
> #11 0x080494ce in main (argc=5, argv=0xbff7eff4) at glusterfsd.c:319
>
>
> --
>
> -Kevan Benson
> -A-1 Networks
>
>
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