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issues:
- When running Nova Compute and Cinder Volume or Backup services on the same
host they must use a shared lock directory to avoid rare race conditions
that can cause volume operation failures (primarily attach/detach of
volumes). This is done by setting the "lock_path" to the same directory
in the "oslo_concurrency" section of nova.conf and cinder.conf. This issue
affects all previous releases utilizing os-brick and shared operations
on hosts between Nova Compute and Cinder data services.
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