Possible Kernel issue (?): "handed out a duplicate delegation" errors

[Nathan Patwardhan]

Ping?

On Tue, May 6, 2008 at 3:55 PM, Nathan Patwardhan <noopy.org at gmail.com> wrote:
> Hello,
>
>  This issue has suddenly cropped up under SLES 10 w/the following specs:
>   - x86_64
>   - kernel 2.6.16.53-0.16-smp
>   - nfs-utils-1.0.7-36.26
>   - nfsidmap-0.12-16.17
>
>  Under certain circumstances (that we're still currently trying to
>  determine), the system will end up under a tremendously high load
>  (over 350!) and will no longer be able to function.  Reads, writes,
>  and killing processes will all fail and the only recourse is to
>  reboot.  When this happens, we see the following in /var/log/messages:
>
>   nfs_inode_set_delegation: server 172.17.4.50, handed out a duplicate
>  delegation!
>   sql[4874]: segfault at 000000006320201c rip 00000000f7e2d9a9 rsp
>   00000000ffb3ff78 error 4
>   sql[4881]: segfault at 000000006320201c rip 00000000f7ebd9a9 rsp
>   00000000ff975da8 error 4
>   nfs_inode_set_delegation: server 172.17.4.50, handed out a duplicate
>  delegation!
>   nfs_inode_set_delegation: server 172.17.4.50, handed out a duplicate
>  delegation!
>   nfs_inode_set_delegation: server 172.17.4.50, handed out a duplicate
>  delegation!
>   nfs_inode_set_delegation: server 172.17.4.50, handed out a duplicate
>  delegation!
>   nfs_inode_set_delegation: server 172.17.4.50, handed out a duplicate
>  delegation!
>   nfs_inode_set_delegation: server 172.17.4.50, handed out a duplicate
>  delegation!
>   nfs_inode_set_delegation: server 172.17.4.50, handed out a duplicate
>  delegation!
>   decode_op_hdr: reply buffer overflowed in line 2071.<4>decode_op_hdr:
>   reply buffer overflowed in line 2071.<4>call_verify: auth check failed
>   call_verify: auth check failed
>
>  Has anyone else seen this before?  The message seems obvious, but I
>  want to make sure that it's not a red herring.
>
>  If the fix is to install updated libraries or a kernel,  we prefer not
>  to install custom RPMs for SLES 10 and instead to wait for packages to
>  be installed via online_update.
>
>  Note that we've only seen this problem under SLES 10 and not under
>  Ubuntu Gutsy or Debian Etch.
>
>  --
>  Nathan Patwardhan
>



-- 
Nathan Patwardhan
"In 1976, (the) Scorpions released Virgin Killer. The album's cover
featured a nude prepubescent girl covered by broken glass, was
designed by the German branch of RCA Records, their label at the
time."