Siyao Meng created HDDS-8555:
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Summary: [Snapshot] When snapshot feature is disabled, block OM
startup if there are still snapshots in the system
Key: HDDS-8555
URL: https://issues.apache.org/jira/browse/HDDS-8555
Project: Apache Ozone
Issue Type: Sub-task
Components: OM
Reporter: Siyao Meng
Assignee: Siyao Meng
This is another follow-up to HDDS-8166 (
Even though theoretically HDDS-8166's approach should work just fine even when
snapshots are taken *before* snapshot feature is set to disabled (Note: those
key blocks will be forever stuck in the cluster because KeyDeletingTask still
checks against existing snapshots unless snapshot feature is enabled again, and
snapshots deleted), as a precaution, we want to add a check during OM startup
to *make sure there are zero snapshots on the cluster when snapshot feature is
disabled*. This can be achieved by checking snapshotInfoTable emptiness.
The snapshot feature flag is not meant to be constantly toggled on and off. The
supported use case is that for a fresh OM cluster that doesn't want to Ozone
snapshot feature to be used, it would be explicitly set to false at the
beginning.
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