Siyao Meng created HDDS-16448:
---------------------------------
Summary: A CLOSED container's sequenceId is silently bumped by a
higher BCSID report, stranding quorum correct replicas
Key: HDDS-16448
URL: https://issues.apache.org/jira/browse/HDDS-16448
Project: Apache Ozone
Issue Type: Bug
Reporter: Siyao Meng
h3. Finding
Internal invariant violation (a CLOSED container's immutable sequenceId is
silently bumped by a healthy higher-BCSID replica report) that demonstrably
propagates to external effect: RatisContainerReplicaCount reclassifies
quorum-correct QUASI_CLOSED replicas as unhealthy (healthy count 3 to 1), so a
fully-replicated CLOSED container is treated as under-replicated and
MismatchedReplicasHandler strands those replicas. Triggerable Level 0 through
the real ContainerReportHandler.onMessage path with an ordinary DN report; the
bump is monotonic with no downstream self-heal.
h3. Classification
* Verdict: REPRODUCED
* Severity: High
* Source: Specula TLA+ model checking and confirmation debate, finding MC-3
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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