[Gluster-devel] [bug] unify_lookup_cbk should retry without revalidate flag when revalidate failed

[Anand Avati]

Li,
 which version of glusterfs are you trying? this was a known issue is
1.3.7and the tla version has the fix.  the fix was that fuse_entry_cbk
does the
retry when a revalidate fails with a fresh lookup, since this kind of
'retry' is more generic than unify-specific.

avati

2008/1/7, LI Daobing <lidaobing at gmail.com>:
>
> Hello,
>
> this story is a little long.
>
> consider a two computer, and each computer have one server and one
> client model. Computer C1's server is a simple posix+server, C1's
> client is a unify on two clients, one client connect to C1's server,
> another client connect to C2's server, unify use rr schedule. C2's
> server and client use the same conf as the C1.(ns on both server is
> OK).
>
> In computer C1's mount diretory M1, we create two file `f1' and `f2',
> f1 will stored on C1 and f2 will stored on C2. use ls command to make
> fuse init the inode of f1 and f2. Also do run ls in C2's mount
> directory to assure f2's fuse will init these two inodes.
>
> then in C1's mount directory M1, run following command 'rm f2; mv f1 f2"
>
> then in C2's mount directory M2, run "cat f2", you will got following
> error[1].  more badly, you don't know how to jump out this stat
> without restart glusterfs.
>
> [1]
> $ cat f2
> cat: f2: File descriptor in bad state
>
> In our case, it's more bad, we have 9 clients, and when this happen,
> we have to restart 8 clients(in fact, we restart all, :) )
>
> I think, we can avoid this problem in the unify_lookup_cbk, when a
> revalidate lookup returned with error, we re-lookup without revalidate
> flag, then we can got the correct sub-volume again.
>
> Any suggestion? Thanks.
>
> BTW, there is a more complex case if C2 is opening f1 and f2, and I
> don't care that case (at least now).
>
> --
> Best Regards,
> LI Daobing
>
>
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