Hello guys,
I had the same problem, there is no more error log.
I resolved by turning off cinder-api, cinder-scheduler and cinder-backup then removing these queues, such as cinder, cinder-scheduler and cinder-backup..
I enabled debug log on rabbitmq and cinder, however, I cannot see any related logs,
2023-07-13 20:57:22.903 666 INFO cinder.backup.manager [req-019d2459-6f43-4839-8ad6-71c805dbd708 6371ebfe0fce499983b1f07e7c34bf6d 183e47a6dd14489991db5c3cf4132a2a - - -] Create backup started, backup: 2cebd275-6fc3-47ae-8c8d-3337f9227057 volume: d8446fb4-032a-44a1-b47d-f922c4a0020e.
2023-07-13 20:57:22.919 666 INFO cinder.backup.manager [req-019d2459-6f43-4839-8ad6-71c805dbd708 6371ebfe0fce499983b1f07e7c34bf6d 183e47a6dd14489991db5c3cf4132a2a - - -] Call Volume Manager to get_backup_device for Backup(availability_zone=None,container=None,created_at=2023-07-13T13:57:22Z,data_timestamp=2023-07-13T13:57:22Z,deleted=False,deleted_at=None,display_description='',display_name='ijoo',encryption_key_id=None,fail_reason=None,host='controller01',id=2cebd275-6fc3-47ae-8c8d-3337f9227057,metadata={},num_dependent_backups=0,object_count=0,parent=None,parent_id=None,project_id='183e47a6dd14489991db5c3cf4132a2a',restore_volume_id=None,service='cinder.backup.drivers.nfs.NFSBackupDriver',service_metadata=None,size=1,snapshot_id=None,status='creating',temp_snapshot_id=None,temp_volume_id=None,updated_at=None,user_id='6371ebfe0fce499983b1f07e7c34bf6d',volume_id=d8446fb4-032a-44a1-b47d-f922c4a0020e)
It is hard to reproduce this problems.