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https://issues.apache.org/jira/browse/HDDS-16441?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Siyao Meng updated HDDS-16441:
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Attachment: HDDS-16441.001.patch
> Cancelled snapshot diff generation publishes an unreadable DONE report on
> resubmit
> ----------------------------------------------------------------------------------
>
> Key: HDDS-16441
> URL: https://issues.apache.org/jira/browse/HDDS-16441
> Project: Apache Ozone
> Issue Type: Bug
> Reporter: Siyao Meng
> Assignee: Siyao Meng
> Priority: Critical
> Attachments: HDDS-16441.001.patch
>
>
> h3. Finding
> A cancelled generation's task publishes its result as the new generation's
> DONE, so the resubmit path (submitSnapshotDiff, cancelSnapshotDiff,
> submitSnapshotDiff) leaves a report the reader cannot read (jobId-prefixed
> key mismatch fails the integrity check) and NPEs on read; the job is stuck
> DONE, is not client-resubmittable, and the client's legitimately recomputed
> diff is discarded, with no recovery until the report-retention TTL GC.
> h3. Classification
> * Verdict: REPRODUCED
> * Severity: Critical
> * Source: Specula TLA+ model checking and confirmation debate, finding MC-1
> h3. Reproduce
> {noformat}
> Ozone commit: 9fbf9ee0cb1bd2f5f5d437b6719ebbe5309351fb
> Specula: v1.1.0 (commit c6aa3dfa)
> Target: om-snapshot-diff-jobs
> Guidance:
> campaigns/ozone-9fbf9ee/targets/009-om-snapshot-diff-jobs/.prompt-extra.md
> {noformat}
> {code:none}
> specula run --agent=claude-code --effort=high --keep-original
> --max-parallel=2 \
> --enable-reviews --confirm-debate --tlc-memory-limit=28G
> --tlc-worker-limit=8 \
> "om-snapshot-diff-jobs|apache/ozone|Java|Use the target-specific
> .prompt-extra.md"
> {code}
> Discovered under HDDS-16430 (Specula TLA+ verification effort). The TLA+
> specification, counterexample, and confirmation debate live in the Specula
> run artifacts.
> Generated with Specula (Claude Opus 4.8).
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