[Lustre-discuss] 2 LustreErrors (possible statahead)

[Mag Gam]

Hello All:

I have been seeing these messages in our syslogs:

Lustre MDS:
1.6.4.3 with kernel 2.6.22

Clients:
lustre: 1.6.6
kernel: patchless
build:  1.6.6-19691231190000-PRISTINE-.usr.src.linux-2.6.18-92.1.10.el5


<snip>
Mar 20 07:15:46 OSS07 kernel: [32288.746536] LustreError:
7960:0:(client.c:521:ptlrpc_import_delay_req()) @@@ IMP_INVALID
req at ffff8103efcb8c00 x9653/t0 o101->MGS at MGC141.128.90.150@tcp_0:26
lens 232/240 ref 1 fl Rpc:/0/0 rc 0/0
Mar 20 07:15:46 OOS07 kernel: [32288.746619] LustreError:
7960:0:(client.c:521:ptlrpc_import_delay_req()) Skipped 59 previous
similar messages
</snip>

<snip>
Mar 20 07:16:08 OOS08 kernel: [32299.414079] LustreError:
7899:0:(client.c:521:ptlrpc_import_delay_req()) @@@ IMP_INVALID
req at ffff810415beb600 x120658/t0 o101->MGS at MGC141.128.90.150@tcp_0:26
lens 232/240 ref 1 fl Rpc:/0/0 rc 0/0
Mar 20 07:16:08 OOS08 kernel: [32299.414163] LustreError:
7899:0:(client.c:521:ptlrpc_import_delay_req()) Skipped 59 previous
similar messages
Mar 20 07:16:18 OOS07 kernel: [32320.441260] LustreError: 137-5: UUID
'lfs001-OST0001_UUID' is not available  for connect (no target)
Mar 20 07:16:18 OOS07 kernel: [32320.441322] LustreError: Skipped 99
previous similar messages
Mar 20 07:16:18 OOS07 kernel: [32320.441358] LustreError:
7565:0:(ldlm_lib.c:1444:target_send_reply_msg()) @@@ processing error
(-19)  req at ffff810406339c50 x2131838/t0 o8-><?>@<?>:-1 lens 304/0 ref
0 fl Interpret:/0/0 rc -19/0
Mar 20 07:16:18 OOS07 kernel: [32320.441434] LustreError:
7565:0:(ldlm_lib.c:1444:target_send_reply_msg()) Skipped 99 previous
similar messages
</snip>


I am wondering if its due to the statahead problem

clients :
cat /proc/fs/lustre/llite/*/statahead_max
32
32

Would disabling statahead fix this problem ?