I am seeing a TON of messages like:
LustreError: 19122:0:(ldlm_lib.c:1892:target_send_reply_msg()) @@@ processing
error (-107) r...@8105cbdd2c00 x1348234052426436/t0 o400-?@?:0/0 lens
192/0 e 0 to 0 dl 1291340852 ref 1 fl Interpret:H/0/0 rc -107/0
LustreError:
Hello!
Essentially your client(s) got disconnected from MGS for some reason
(somewhere earlier in MGS logs you should see something about that).
Now the clients did not know they were disconnected and discover this sad
fact next time they try to talk to MGS (sending their periodic PINGs