Aryan Gupta created HDDS-16162:
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Summary: KeyLifecycleService should retry failed move-to-trash
entries without advancing scan state
Key: HDDS-16162
URL: https://issues.apache.org/jira/browse/HDDS-16162
Project: Apache Ozone
Issue Type: Improvement
Reporter: Aryan Gupta
Assignee: Aryan Gupta
When lifecycle expiration is configured to move expired keys to trash,
{{KeyLifecycleService}} currently clears the pending key list even if
{{moveToTrash}} fails. It can then save lifecycle scan state past those keys,
so the failed keys are not retried until a later full scan.
We should avoid marking failed trash moves as processed. If moving expired keys
or directories to trash fails, the lifecycle task should fail for that bucket
without saving scan state past the failed entries. The next lifecycle run can
then retry them from the previous scan position.
h2. Benefits
* Preserves trash semantics: keys are not directly deleted when trash move
fails.
* Prevents lifecycle from silently skipping expired keys.
* Retries failed keys sooner, instead of waiting for a full bucket scan to
complete.
* Keeps scan state accurate: only successfully handled entries are marked as
progress.
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