OLVM: Image Upload Fails with Error "Timeout Starting NBD Server" (Doc ID 2879997.1)

Last updated on JULY 07, 2022

Applies to:

Symptoms

Unable to upload any image files using UI in OLVM 4.4.

KVM host's /var/log/messages:

Jun 28 10:44:45 test-kvm qemu-nbd[305709]: /usr/bin/qemu-nbd: unrecognized option '--allocation-depth'
Jun 28 10:44:45 test-kvm qemu-nbd[305709]: qemu-nbd: Try '/usr/bin/qemu-nbd --help' for more information.
Jun 28 10:44:45 test-kvm systemd[1]: vdsm-nbd-edcf7bc6-80cc-4411-a247-50d261f####.service: Main process exited, code=exited, status=1/FAILURE
Jun 28 10:44:45 test-kvm systemd[1]: vdsm-nbd-edcf7bc6-80cc-4411-a247-50d261f####.service: Failed with result 'exit-code'.

engine.log:

2022-06-28 10:44:47,297+07 ERROR [org.ovirt.engine.core.vdsbroker.vdsbroker.StartNbdServerVDSCommand] (EE-ManagedScheduledExecutorService-engineScheduledThreadPool-Thread-77) [8538bf3a-1469-4bf0-82f6-0960672#####] Failed in 'StartNbdServerVDS' method
2022-06-28 10:44:47,302+07 ERROR [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (EE-ManagedScheduledExecutorService-engineScheduledThreadPool-Thread-77) [8538bf3a-1469-4bf0-82f6-0960672#####] EVENT_ID: VDS_BROKER_COMMAND_FAILURE(10,802), VDSM test-kvm.xyz.dom command StartNbdServerVDS failed: Timeout starting NBD server edcf7bc6-80cc-4411-a247-50d261f#####: {'discard': False, 'readonly': False, 'bitmap': None, 'sd_id': 'c88007df-06a3-4bda-b598-d0f818a#####', 'img_id': 'a753901a-dc74-49c2-8834-ef822fb#####', 'vol_id': '96aa1934-1628-4432-bec5-0d6019a#####', 'backing_chain': True}

vdsm.log:

2022-06-28 10:44:48,692+0700 INFO (jsonrpc/2) [vdsm.api] FINISH start_nbd_server error=Timeout starting NBD server 26e82b64-cde2-4af3-8330-c498e80#####: {'discard': False, 'readonly': False, 'bitmap': None, 'sd_id': 'c88007df-06a3-4bda-b598-d0f818a#####', 'img_id': 'a753901a-dc74-49c2-8834-ef822fb#####', 'vol_id': '96aa1934-1628-4432-bec5-0d6019a#####', 'backing_chain': True} from=::ffff:##.###.#.##,44242, flow_id=8538bf3a-1469-4bf0-82f6-0960672#####, task_id=10460f53-c0c4-4121-8c04-564b98d##### (api:52)
2022-06-28 10:44:48,692+0700 ERROR (jsonrpc/2) [storage.TaskManager.Task] (Task='10460f53-c0c4-4121-8c04-564b98d#####') Unexpected error (task:877)
Traceback (most recent call last):
File "/usr/lib/python3.6/site-packages/vdsm/storage/task.py", line 884, in _run
return fn(*args, **kargs)
File "<decorator-gen-231>", line 2, in start_nbd_server
File "/usr/lib/python3.6/site-packages/vdsm/common/api.py", line 50, in method
ret = func(*args, **kwargs)
File "/usr/lib/python3.6/site-packages/vdsm/storage/hsm.py", line 3776, in start_nbd_server
url = nbd.start_server(server_id, config)
File "/usr/lib/python3.6/site-packages/vdsm/storage/nbd.py", line 155, in start_server
.format(server_id, config))
vdsm.storage.nbd.Timeout: Timeout starting NBD server 26e82b64-cde2-4af3-8330-c498e80#####: {'discard': False, 'readonly': False, 'bitmap': None, 'sd_id': 'c88007df-06a3-4bda-b598-d0f818a#####', 'img_id': 'a753901a-dc74-49c2-8834-ef822fb#####', 'vol_id': '96aa1934-1628-4432-bec5-0d6019a#####', 'backing_chain': True}

Changes

 New installation.

Cause

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