Siyao Meng created HDDS-16457:
---------------------------------
Summary: DiskBalancer EC move plus crash leaves a durable CLOSED
plus UNHEALTHY two copy inconsistency
Key: HDDS-16457
URL: https://issues.apache.org/jira/browse/HDDS-16457
Project: Apache Ozone
Issue Type: Bug
Reporter: Siyao Meng
h3. Finding
An EC replica move plus a mid-move crash and restart leaves a durable two-copy
inconsistency (CLOSED source plus an UNHEALTHY destination) that no DN-local
mechanism reclaims, and the UNHEALTHY copy can win the in-memory slot and be
reported to SCM. Triggerable through normal DiskBalancer EC moves with a single
crash in the AtomicMove-to-import window; harm is a permanent orphaned replica
(disk leak plus volume-accounting drift) and a spurious UNHEALTHY report, so
bounded-but-durable 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: dn-disk-balancer
Guidance:
campaigns/ozone-9fbf9ee/targets/021-dn-disk-balancer/.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
\
"dn-disk-balancer|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).
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
