[
https://issues.apache.org/jira/browse/HDDS-16461?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Siyao Meng updated HDDS-16461:
------------------------------
Attachment: HDDS-16461.001.patch
> Asymmetric decrement inflates persisted pendingDeleteBlockCount (masked by
> restart reset)
> -----------------------------------------------------------------------------------------
>
> Key: HDDS-16461
> URL: https://issues.apache.org/jira/browse/HDDS-16461
> Project: Apache Ozone
> Issue Type: Bug
> Reporter: Siyao Meng
> Priority: Minor
> Attachments: HDDS-16461.001.patch
>
>
> h3. Finding
> An asymmetric decrement in the V2/V3 block-deletion path leaves the persisted
> pendingDeleteBlockCount inflated on a fully drained container (an internal
> invariant violation reachable via the real mark path plus one background
> deletion pass when a block is processed more times than it is unlinked, e.g.
> duplicate txns per HDDS-11267 or SCM at-least-once redelivery). No live
> consumer reads the persisted value while the DN runs; the only activation
> path (restart reload) is masked by resetPendingDeleteBlockCount (HDDS-7156),
> which converts the divergence into one wasted deletion pass and a log line
> rather than external corruption.
> 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: dn-block-deletion
> Guidance:
> campaigns/ozone-9fbf9ee/targets/017-dn-block-deletion/.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-block-deletion|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).
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
