Siyao Meng created HDDS-16456:
---------------------------------
Summary: Non atomic timeout re arm resurrects a recovering
container entry and marks a valid EC replica UNHEALTHY
Key: HDDS-16456
URL: https://issues.apache.org/jira/browse/HDDS-16456
Project: Apache Ozone
Issue Type: Bug
Reporter: Siyao Meng
h3. Finding
A non-atomic timeout re-arm on the write RPC tail resurrects a
recoveringContainerMap entry for a container that concurrently moved to
CLOSING/CLOSED; the scrub then marks that valid replica UNHEALTHY, driving SCM
re-replication of a good replica. Triggered by a concurrent write RPC and
CloseContainerCommand on a RECOVERING EC target; same bounded, self-healing
external effect as the stale-scrub demotion.
h3. Classification
* Verdict: REPRODUCED
* 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: dn-ec-reconstruction
Guidance:
campaigns/ozone-9fbf9ee/targets/022-dn-ec-reconstruction/.prompt-extra.md
{noformat}
{code:none}
specula run --agent=claude-code --effort=high --keep-original --max-parallel=2 \
--enable-reviews --confirm-debate --tlc-memory-limit=28G --tlc-worker-limit=8
\
"dn-ec-reconstruction|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).
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