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https://issues.apache.org/jira/browse/HDDS-16443?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Siyao Meng updated HDDS-16443:
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Attachment: HDDS-16443.001.patch
> Snapshot diff cleanup can purge a freshly created generation on resubmit and
> crash the client RPC
> -------------------------------------------------------------------------------------------------
>
> Key: HDDS-16443
> URL: https://issues.apache.org/jira/browse/HDDS-16443
> Project: Apache Ozone
> Issue Type: Bug
> Reporter: Siyao Meng
> Priority: Major
> Attachments: HDDS-16443.001.patch
>
>
> h3. Finding
> On resubmit of a terminal job the cleanup service can purge the
> freshly-created live generation between the two persisted writes, deleting
> the active row and crashing the client's resubmit RPC with an uncaught NPE;
> harm is externally observable but bounded and client-retryable (retry is
> treated as a fresh submit), and the window is very small versus the default
> cleanup interval.
> h3. Classification
> * Verdict: REPRODUCED
> * Severity: High
> * Source: Specula TLA+ model checking and confirmation debate, finding MC-2
> 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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