Lustre discuss - Aug 2008 - operation 400 on unconnected MGS

The problem I was refering to:

With the new filesystem we just created I am getting the following  
problem,

clients loose connection to the MGS and the MGS says it evicted  
them,  machines are on the same network and there is no errors on the  
interfaces.  The MGS  says:

Lustre: MGS: haven''t heard from client e8eb1779-5cea-9cc7- 
b5ae-4c5ccf54f5ca (at 141.212.31.94 at tcp) in 240 seconds. I think
it''s
dead, and I am evicting it.
LustreError: 9103:0:(mgs_handler.c:538:mgs_handle()) lustre_mgs:  
operation 400 on unconnected MGS
LustreError: 9103:0:(ldlm_lib.c:1536:target_send_reply_msg()) @@@  
processing error (-107)  req at 000001002f4e3050 x24929/t0
o400-><?>@<?>:
0/0 lens 128/0 e 0 to 0 dl 1218142953 ref 1 fl Interpret:/0/0 rc -107/0


The "operation 400 on unconnected MGS"  is the only new message I am  
not familiar with.  Once the client losses connection with the MGS I  
will see the OST''s start booting the client also.


Servers are 1.6.5.1  clients are patch-less 1.6.4.1  on RHEL4.

Any insight would be great.

Brock Palen
www.umich.edu/~brockp
Center for Advanced Computing
brockp at umich.edu
(734)936-1985

On Thu, 2008-08-07 at 17:10 -0400, Brock Palen wrote:
> The problem I was refering to:
> 
> With the new filesystem we just created I am getting the following  
> problem,
> 
> clients loose connection to the MGS and the MGS says it evicted  
> them,  machines are on the same network and there is no errors on the  
> interfaces.  The MGS  says:
> 
> Lustre: MGS: haven''t heard from client e8eb1779-5cea-9cc7- 
> b5ae-4c5ccf54f5ca (at 141.212.31.94 at tcp) in 240 seconds. I think
it''s
> dead, and I am evicting it.
> LustreError: 9103:0:(mgs_handler.c:538:mgs_handle()) lustre_mgs:  
> operation 400 on unconnected MGS
> LustreError: 9103:0:(ldlm_lib.c:1536:target_send_reply_msg()) @@@  
> processing error (-107)  req at 000001002f4e3050 x24929/t0
o400-><?>@<?>:
> 0/0 lens 128/0 e 0 to 0 dl 1218142953 ref 1 fl Interpret:/0/0 rc -107/0
Do you have any messages on the client that correlate?  Please use
timestamps in syslogs from machines that are timesync''d to show the
correlating MGS eviction and client messages around the same timeframe.

b.

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