Lustre discuss - Sep 2009 - LustreError: ptlrpc body, buffer size, message magic

Hi all,

on our 1.6.7.2 system, the MDT is quite busy writing the following type
of messages to the log, and I would just like to ask if somebody has an
idea what they mean and if they mean harm:

Sep 21 19:50:30 mds1 kernel: LustreError:
6009:0:(pack_generic.c:566:lustre_msg_buf_v2()) msg ffff81069a7090c0
buffer[0] size 0 too small (required 88)
Sep 21 19:50:30 mds1 kernel: LustreError:
6009:0:(pack_generic.c:1185:lustre_msg_get_flags()) invalid msg
ffff81069a7090c0: no ptlrpc body!
Sep 21 19:53:14 mds1 kernel: LustreError:
6029:0:(pack_generic.c:1503:lustre_msg_get_status()) incorrect message
magic: 00000000



In fact, there are no other LustreError messages in our MDT log. Bothers
me more than these three, since I was used to a much wider variety of
(difficult-to-understand) Error messages...

Regards,
Thomas

On Sep 21, 2009  20:14 +0200, Thomas Roth wrote:
> on our 1.6.7.2 system, the MDT is quite busy writing the following type
> of messages to the log, and I would just like to ask if somebody has an
> idea what they mean and if they mean harm:
> 
> Sep 21 19:50:30 mds1 kernel: LustreError:
> 6009:0:(pack_generic.c:566:lustre_msg_buf_v2()) msg ffff81069a7090c0
> buffer[0] size 0 too small (required 88)
> Sep 21 19:50:30 mds1 kernel: LustreError:
> 6009:0:(pack_generic.c:1185:lustre_msg_get_flags()) invalid msg
> ffff81069a7090c0: no ptlrpc body!
> Sep 21 19:53:14 mds1 kernel: LustreError:
> 6029:0:(pack_generic.c:1503:lustre_msg_get_status()) incorrect message
> magic: 00000000
We shouldn''t ever send 0-length messages, so it is possible that the
network is dropping partially-completed messages?

Cheers, Andreas
--
Andreas Dilger
Sr. Staff Engineer, Lustre Group
Sun Microsystems of Canada, Inc.