Siyao Meng created HDDS-16445:
---------------------------------
Summary: SCM over replication split lock read can delete a live
replica and drop a CLOSED container below RF
Key: HDDS-16445
URL: https://issues.apache.org/jira/browse/HDDS-16445
Project: Apache Ozone
Issue Type: Bug
Reporter: Siyao Meng
h3. Finding
A split-lock read in processOverReplicatedContainer issues an extra delete
against a live replica, dropping a CLOSED RF=3 container below RF
(DurableReplicationFloor safety violation). Reachable from normal concurrent
over-replication processing racing a container-report handler; harm is bounded
because a later cycle re-replicates, so High rather than Critical.
h3. Classification
* Verdict: REPRODUCED
* Severity: High
* Source: Specula TLA+ model checking and confirmation debate, finding MC-1
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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