Siyao Meng created HDDS-16449:
---------------------------------
Summary: SCM leadership transfer can schedule a redundant delete
that drops a container below RF
Key: HDDS-16449
URL: https://issues.apache.org/jira/browse/HDDS-16449
Project: Apache Ozone
Issue Type: Bug
Reporter: Siyao Meng
h3. Finding
On SCM leadership transfer the new leader clears pending ops and schedules a
redundant delete on a different replica; if both deletes land the container
falls below RF. Same safety consequence as the over-replication split-lock
delete, currently masked by the datanode-side term gate composed with the
5-minute RM startup wait exceeding the 30s heartbeat term propagation. MASKED:
classified by the consequence the defect would expose if the timing mask were
absent.
h3. Classification
* Verdict: MASKED
* 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: scm-ratis-replication
Guidance:
campaigns/ozone-9fbf9ee/targets/012-scm-ratis-replication/.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-ratis-replication|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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