Hello,
We've been having intermittent problems with our cluster. One node is
reporting Lustre-related errors. The node connects to the Lustre filesystem
over omnipath, and although we suspect this is the cause of the error, the
link shows everything is fine, although if the problem is intermittent that
doesn't add much. All of our other nodes don't suffer from this problem.  I
was wondering if anyone could help me make sense of these issues, before I
swap omnipath cables with the node next to it and see if the error moves?
I've included ~50 minutes of logs stripped down to the Lustre relevant
section.

Thanks for taking the time to look at this,
James

Jan 06 02:04:44 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f5c7ee30400
Jan 06 02:03:55 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f5b37db7800
Jan 06 02:03:01 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f5c7ded2400
Jan 06 02:02:38 node052. kernel: Lustre: Skipped 14
previous similar messages
Jan 06 02:02:38 node052. kernel: Lustre: pscratch-
OST000d-osc-ffff8f7c7a874000: Connection restored to 10.12.3.4@o2ib (at
10.12.3.4@o2ib)
Jan 06 02:02:38 node052. kernel: Lustre: Skipped 14
previous similar messages
Jan 06 02:02:38 node052. kernel: Lustre: pscratch-
OST000d-osc-ffff8f7c7a874000: Connection to pscratch-OST000d (at
10.12.3.4@o2ib)
was lost; in progress operations using this service will wait for recovery
to
complete
Jan 06 02:02:38 node052. kernel: Lustre: 2612:0:
(client.c:2169:ptlrpc_expire_one_request()) Skipped 14 previous similar
messages
Jan 06 02:02:38 node052. kernel: Lustre: 2612:0:
(client.c:2169:ptlrpc_expire_one_request()) @@@ Request sent has failed due
to
network error: [sent 1736128955/real 1736128955] req@ffff8f5708379b00
x1818069513346688/t0(0) o3->pscratch-OST000d-osc-
ffff8f7c7a874000@10.12.3.4@o2ib:6/4 lens 488/440 e 0 to 1 dl 1736128966 ref
2 fl
Rpc:eX/0/ffffffff rc 0/-1
Jan 06 02:02:38 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f5a32f37c00
Jan 06 02:02:19 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f58ff316c00
Jan 06 01:58:45 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f5b752c0c00
Jan 06 01:57:50 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f5af82b7400
Jan 06 01:56:08 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f5b752c3800
Jan 06 01:55:17 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f58714ccc00
Jan 06 01:54:00 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f5a9429a000
Jan 06 01:53:13 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f5c6d0eb000
Jan 06 01:52:30 node052. kernel: Lustre: Skipped 18
previous similar messages
Jan 06 01:52:30 node052. kernel: Lustre: pscratch-
OST000d-osc-ffff8f7c7a874000: Connection restored to 10.12.3.4@o2ib (at
10.12.3.4@o2ib)
Jan 06 01:52:30 node052. kernel: Lustre: Skipped 19
previous similar messages
Jan 06 01:52:30 node052. kernel: Lustre: pscratch-
OST000d-osc-ffff8f7c7a874000: Connection to pscratch-OST000d (at
10.12.3.4@o2ib)
was lost; in progress operations using this service will wait for recovery
to
complete
Jan 06 01:52:30 node052. kernel: Lustre: 2596:0:
(client.c:2169:ptlrpc_expire_one_request()) Skipped 19 previous similar
messages
Jan 06 01:52:30 node052. kernel: Lustre: 2596:0:
(client.c:2169:ptlrpc_expire_one_request()) @@@ Request sent has timed out
for
slow reply: [sent 1736128306/real 1736128306] req@ffff8f47171e5580
x1818069513186304/t0(0) o3->pscratch-OST000d-osc-
ffff8f7c7a874000@10.12.3.4@o2ib:6/4 lens 488/440 e 0 to 1 dl 1736128350 ref
2 fl
Rpc:X/2/ffffffff rc 0/-1
Jan 06 01:51:46 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f576e192400
Jan 06 01:50:54 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f5ad7efa000
Jan 06 01:50:07 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f5c7ded0c00
Jan 06 01:49:49 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f58ff011800
Jan 06 01:48:44 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f5c7aa1ec00
Jan 06 01:47:14 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f5a428d7800
Jan 06 01:45:53 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f7c67fb9c00
Jan 06 01:45:04 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f7c67fb9c00
Jan 06 01:44:14 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f7c67fb9c00
Jan 06 01:43:24 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f7c67fb9c00
Jan 06 01:42:00 node052. kernel: Lustre: Skipped 20
previous similar messages
Jan 06 01:42:00 node052. kernel: Lustre: pscratch-
OST0011-osc-ffff8f7c7a874000: Connection restored to 10.12.3.5@o2ib (at
10.12.3.5@o2ib)
Jan 06 01:42:00 node052. kernel: Lustre: Skipped 20
previous similar messages
Jan 06 01:42:00 node052. kernel: Lustre: pscratch-
OST0011-osc-ffff8f7c7a874000: Connection to pscratch-OST0011 (at
10.12.3.5@o2ib)
was lost; in progress operations using this service will wait for recovery
to
complete
Jan 06 01:42:00 node052. kernel: Lustre: 2618:0:
(client.c:2169:ptlrpc_expire_one_request()) Skipped 20 previous similar
messages
Jan 06 01:42:00 node052. kernel: Lustre: 2618:0:
(client.c:2169:ptlrpc_expire_one_request()) @@@ Request sent has timed out
for
slow reply: [sent 1736127672/real 1736127672] req@ffff8f4d5a6cb180
x1818069512989632/t0(0) o3->pscratch-OST0011-osc-
ffff8f7c7a874000@10.12.3.5@o2ib:6/4 lens 488/440 e 0 to 1 dl 1736127719 ref
2 fl
Rpc:X/2/ffffffff rc 0/-1
Jan 06 01:41:12 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f5a42875800
Jan 06 01:40:06 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f5c6d0ee000
Jan 06 01:39:54 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f5c6d0ee000
Jan 06 01:38:55 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f5b0be37800
Jan 06 01:38:04 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f7c7d710800
Jan 06 01:36:21 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f4a24fa8800
Jan 06 01:35:34 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f4a24fa8800
Jan 06 01:34:48 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f4a24fa8800
Jan 06 01:33:27 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f5c7aa1fc00
Jan 06 01:32:36 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f5a653c8400
Jan 06 01:31:49 node052. kernel: Lustre: Skipped 15
previous similar messages
Jan 06 01:31:49 node052. kernel: Lustre: pscratch-
OST0011-osc-ffff8f7c7a874000: Connection restored to 10.12.3.5@o2ib (at
10.12.3.5@o2ib)
Jan 06 01:31:49 node052. kernel: Lustre: Skipped 15
previous similar messages
Jan 06 01:31:49 node052. kernel: Lustre: pscratch-
OST0011-osc-ffff8f7c7a874000: Connection to pscratch-OST0011 (at
10.12.3.5@o2ib)
was lost; in progress operations using this service will wait for recovery
to
complete
Jan 06 01:31:49 node052. kernel: Lustre: 2608:0:
(client.c:2169:ptlrpc_expire_one_request()) Skipped 15 previous similar
messages
Jan 06 01:31:49 node052. kernel: Lustre: 2608:0:
(client.c:2169:ptlrpc_expire_one_request()) @@@ Request sent has failed due
to
network error: [sent 1736127107/real 1736127107] req@ffff8f54f0657980
x1818069512865792/t0(0) o3->pscratch-OST0011-osc-
ffff8f7c7a874000@10.12.3.5@o2ib:6/4 lens 504/440 e 0 to 1 dl 1736127153 ref
2 fl
Rpc:eX/0/ffffffff rc 0/-1
Jan 06 01:31:49 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f7c7e714800
Jan 06 01:30:04 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f58e01d8800
Jan 06 01:29:12 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f4f40868800
Jan 06 01:28:07 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f5c6d0ebc00
Jan 06 01:26:52 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f5a653c9000
Jan 06 01:25:55 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f7c7e714800
Jan 06 01:23:58 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f7c7e34cc00
Jan 06 01:23:04 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f58f1633000
Jan 06 01:21:01 node052. kernel: Lustre: Skipped 24
previous similar messages
Jan 06 01:21:01 node052. kernel: Lustre: pscratch-
OST0001-osc-ffff8f7c7a874000: Connection restored to 10.12.3.1@o2ib (at
10.12.3.1@o2ib)
Jan 06 01:21:01 node052. kernel: Lustre: Skipped 25
previous similar messages
Jan 06 01:21:01 node052. kernel: Lustre: pscratch-
OST0001-osc-ffff8f7c7a874000: Connection to pscratch-OST0001 (at
10.12.3.1@o2ib)
was lost; in progress operations using this service will wait for recovery
to
complete
Jan 06 01:21:01 node052. kernel: Lustre: 2604:0:
(client.c:2169:ptlrpc_expire_one_request()) Skipped 25 previous similar
messages
Jan 06 01:21:01 node052. kernel: Lustre: 2604:0:
(client.c:2169:ptlrpc_expire_one_request()) @@@ Request sent has failed due
to
network error: [sent 1736126457/real 1736126457] req@ffff8f55359ef500
x1818069512692032/t0(0) o3->pscratch-OST0001-osc-
ffff8f7c7a874000@10.12.3.1@o2ib:6/4 lens 488/440 e 0 to 1 dl 1736126504 ref
2 fl
Rpc:eX/0/ffffffff rc 0/-1
Jan 06 01:21:01 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f5a32f30400
Jan 06 01:20:00 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f5c7dfb9c00
Jan 06 01:15:34 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f5a32f34000
Jan 06 01:14:40 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f58e01d9800
Jan 06 01:14:05 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f4a24faa000
Jan 06 01:13:56 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f4a24faa000
Jan 06 01:13:17 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f5c6d0d7400
Jan 06 01:12:56 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f59fb1d2c00
Jan 06 01:12:28 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f5753e80c00
Jan 06 01:12:12 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f5753e80c00
Jan 06 01:11:56 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f5753e80c00
Jan 06 01:11:34 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f5b37db2c00
Jan 06 01:11:17 node052. kernel: LustreError: 2552:0:
(events.c:205:client_bulk_callback()) event type 2, status -103, desc
ffff8f5b37db2c00
Jan 06 01:11:00 node052. kernel: Lustre: Skipped 25
previous similar messages
Jan 06 01:11:00 node052. kernel: Lustre: pscratch-
OST0011-osc-ffff8f7c7a874000: Connection restored to 10.12.3.5@o2ib (at
10.12.3.5@o2ib)




-- 
Dr James Allsopp | Research Platforms team
IT Services | University of Sheffield
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