[jira] [Updated] (HDDS-16451) Cross lock lost update of ContainerInfo sequenceId (masked by report resend and writeLock)

["Siyao Meng (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HDDS-16451?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Siyao Meng updated HDDS-16451:
------------------------------
    Attachment: HDDS-16451.001.patch

> Cross lock lost update of ContainerInfo sequenceId (masked by report resend and writeLock)
> ------------------------------------------------------------------------------------------
>
>                 Key: HDDS-16451
>                 URL: https://issues.apache.org/jira/browse/HDDS-16451
>             Project: Apache Ozone
>          Issue Type: Bug
>            Reporter: Siyao Meng
>            Priority: Minor
>         Attachments: HDDS-16451.001.patch
>
>
> h3. Finding
> Cross-lock lost update of a shared ContainerInfo sequenceId (report path under synchronized(containerInfo), Ratis-apply path under striped writeLock(id)) is a real race but its harm is masked: for OPEN/QUASI_CLOSED the periodic report resend re-raises the value via max(), and the durable/follower value is serialized under writeLock so an in-memory clobber cannot corrupt it. Internal invariant violation with downstream risk (an understated in-memory seqId feeding a resurrection/close decision in a narrow window) but no consumer observed the wrong outcome.
> h3. Classification
> * Verdict: MASKED
> * Severity: Medium
> * Source: Specula TLA+ model checking and confirmation debate, finding CR-4
> h3. Reproduce
> {noformat}
> Ozone commit: 9fbf9ee0cb1bd2f5f5d437b6719ebbe5309351fb
> Specula:      v1.1.0 (commit c6aa3dfa)
> Target:       scm-container-lifecycle
> Guidance:     campaigns/ozone-9fbf9ee/targets/015-scm-container-lifecycle/.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-container-lifecycle|apache/ozone|Java|Use the target-specific .prompt-extra.md"
> {code}
> Discovered under HDDS-16431 (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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