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Member "nova-19.0.1/releasenotes/notes/os-brick-lock-dir-c659089679aac50f.yaml" (6 Jun 2019, 531 Bytes) of package /linux/misc/openstack/nova-19.0.1.tar.gz:
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3 - When running Nova Compute and Cinder Volume or Backup services on the same
4 host they must use a shared lock directory to avoid rare race conditions
5 that can cause volume operation failures (primarily attach/detach of
6 volumes). This is done by setting the "lock_path" to the same directory
7 in the "oslo_concurrency" section of nova.conf and cinder.conf. This issue
8 affects all previous releases utilizing os-brick and shared operations
9 on hosts between Nova Compute and Cinder data services.