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https://issues.apache.org/jira/browse/HDDS-16458?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Siyao Meng updated HDDS-16458:
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Attachment: HDDS-16458.001.patch
> DiskBalancer EC move crash before source delete mark leaves a permanent
> orphaned replica
> ----------------------------------------------------------------------------------------
>
> Key: HDDS-16458
> URL: https://issues.apache.org/jira/browse/HDDS-16458
> Project: Apache Ozone
> Issue Type: Bug
> Reporter: Siyao Meng
> Priority: Major
> Attachments: HDDS-16458.001.patch
>
>
> h3. Finding
> After a DiskBalancer EC move, a crash (or swallowed mark failure) before the
> source is durably marked for delete drops the volatile pending-deletion
> queue, and restart reconciliation deliberately leaves both EC copies,
> producing a permanent orphaned replica untracked in memory. Triggerable via
> normal EC moves plus one crash; harm is a durable disk leak and under-counted
> volume accounting, bounded and not client-visible corruption.
> 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: dn-disk-balancer
> Guidance:
> campaigns/ozone-9fbf9ee/targets/021-dn-disk-balancer/.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 \
> "dn-disk-balancer|apache/ozone|Java|Use the target-specific
> .prompt-extra.md"
> {code}
> Discovered under HDDS-16433 (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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