constant "failed to submit message" to rpc-transport

[Michael Brown <michael@xxxxxxxxxxxx>]

After a bit of load, I constantly find my gluster server getting into a state where it seems to be unable to reply to NFS RPCs:

[2013-05-05 01:31:16.421507] E [rpcsvc.c:1080:rpcsvc_submit_generic] 0-rpc-service: failed to submit message (XID: 0x3705786983x, Program: NFS3, ProgVers: 3, Proc: 6) to rpc-transport (socket.nfs-server)
[2013-05-05 01:31:16.421528] E [nfs3.c:627:nfs3svc_submit_vector_reply] 0-nfs-nfsv3: Reply submission failed

http://pastie.org/7803022

Any idea what to do about it?

The NFS daemon also gets rather large - I suspect it's storing up data for all these RPCs:
  PID USER      PRI  NI  VIRT   RES   SHR S CPU% MEM%   TIME+  Command
30674 root       20   0 37.6G 37.3G  2288 R 99.0 29.6  5:29.88 /usr/local/glusterfs/sbin/glusterfs

I'm running 3.3.1 with a few patches: https://github.com/Supermathie/glusterfs/tree/release-3.3-oracle

Workload is usually Oracle DNFS.

M.

-- 
Michael Brown               | `One of the main causes of the fall of
Systems Consultant          | the Roman Empire was that, lacking zero,
Net Direct Inc.             | they had no way to indicate successful
☎: +1 519 883 1172 x5106    | termination of their C programs.' - Firth