[Lustre-discuss] LustreErrors on mgs/mdt when accessing files

[Patrick Winnertz]

Hey,

After a test on my freshly installed testcluster with lustre 1.6.7 I saw some 
errors in our logfiles. 

I've basically created plenty of files with: i=1; while true; do touch $i; echo 
$i > $i; i=$(($i+1)); done
and tried to delete them later with:  lfs find . | xargs rm
Many files are deleted properly, but after a while lfs find stated:
-------------------------------
[...]
warning: cb_find_init: ./3933 does not exist: No such file or directory (2)
warning: cb_find_init: ./2873 does not exist: No such file or directory (2)
warning: cb_find_init: ./4126 does not exist: No such file or directory (2)
[...]
-------------------------------
At the same time this shows up on the mgs/mdt server in dmesg:
---------------------------
LustreError: 2493:0:(ldlm_lib.c:1643:target_send_reply_msg()) Skipped 143 
previous similar messages
LustreError: 2444:0:(ldlm_lib.c:1643:target_send_reply_msg()) @@@ processing 
error (-2)  req at dcde5200 x21558/t0 o34->50bef30a-7a07-
d9da-81c5-8fb613d6b8d6 at NET_0x20000c0a80103_UUID:0/0 lens 312/128 e 0 to 0 dl 
1237193648 ref 1 fl Interpret:/0/0 rc -2/0
LustreError: 2444:0:(ldlm_lib.c:1643:target_send_reply_msg()) Skipped 2216 
previous similar messages
LustreError: 2386:0:(ldlm_lib.c:1643:target_send_reply_msg()) @@@ processing 
error (-2)  req at df8c3600 x32012/t0 o34->50bef30a-7a07-
d9da-81c5-8fb613d6b8d6 at NET_0x20000c0a80103_UUID:0/0 lens 312/128 e 0 to 0 dl 
1237193799 ref 1 fl Interpret:/0/0 rc -2/0
LustreError: 2386:0:(ldlm_lib.c:1643:target_send_reply_msg()) Skipped 542 
previous similar messages
LustreError: 2386:0:(ldlm_lib.c:1643:target_send_reply_msg()) @@@ processing 
error (-2)  req at d0c53000 x126145/t0 o34->50bef30a-7a07-
d9da-81c5-8fb613d6b8d6 at NET_0x20000c0a80103_UUID:0/0 lens 312/128 e 0 to 0 dl 
1237194056 ref 1 fl Interpret:/0/0 rc -2/0
LustreError: 2386:0:(ldlm_lib.c:1643:target_send_reply_msg()) Skipped 3436 
previous similar messages
------------------------------

Any hints what was going wrong here and why there was no errors when creating 
these files?

Greetings
Patrick
-- 
Patrick Winnertz
Tel.: +49 (0) 2161 / 4643 - 0

credativ GmbH, HRB Mönchengladbach 12080
Hohenzollernstr. 133, 41061 Mönchengladbach
Geschäftsführung: Dr. Michael Meskes, Jörg Folz