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https://issues.apache.org/jira/browse/HDDS-16453?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Siyao Meng updated HDDS-16453:
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Attachment: HDDS-16453.001.patch
> Unguarded transaction buffer flush commits data under a stale index (masked
> by idempotent replay)
> -------------------------------------------------------------------------------------------------
>
> Key: HDDS-16453
> URL: https://issues.apache.org/jira/browse/HDDS-16453
> Project: Apache Ozone
> Issue Type: Bug
> Reporter: Siyao Meng
> Priority: Minor
> Attachments: HDDS-16453.001.patch
>
>
> h3. Finding
> An unguarded flush() during an apply commits data under a stale transaction
> index (DurableIndexMatchesData violated), so a crash+recover re-applies an
> already-durable entry. Reachable from the real notifyLeaderChanged /
> saveConfiguration flush callers, but the consequence is masked by SCM's
> idempotent-replay design (all @Replicate transactions are absolute-put/CAS;
> the one non-idempotent quantity is a deprecated no-op). Internal invariant
> violation with no external effect today but real downstream divergence risk
> the moment a non-idempotent replicated transaction is added.
> h3. Classification
> * Verdict: MASKED
> * Severity: Medium
> * Source: Specula TLA+ model checking and confirmation debate, finding MC-1
> h3. Reproduce
> {noformat}
> Ozone commit: 9fbf9ee0cb1bd2f5f5d437b6719ebbe5309351fb
> Specula: v1.1.0 (commit c6aa3dfa)
> Target: scm-ha-tx-buffer
> Guidance:
> campaigns/ozone-9fbf9ee/targets/018-scm-ha-tx-buffer/.prompt-extra.md
> {noformat}
> {code:none}
> specula run --agent=claude-code --effort=medium --keep-original
> --max-parallel=2 \
> --enable-reviews --confirm-debate --tlc-memory-limit=28G
> --tlc-worker-limit=8 \
> "scm-ha-tx-buffer|apache/ozone|Java|Use the target-specific
> .prompt-extra.md"
> {code}
> Discovered under HDDS-16432 (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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