[
https://issues.apache.org/jira/browse/HDDS-16428?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Siyao Meng reassigned HDDS-16428:
---------------------------------
Assignee: Siyao Meng
> Formal verification for Ozone OM read consistency (follower reads and hsync
> lease commit) with TLA+
> ---------------------------------------------------------------------------------------------------
>
> Key: HDDS-16428
> URL: https://issues.apache.org/jira/browse/HDDS-16428
> Project: Apache Ozone
> Issue Type: Sub-task
> Reporter: Siyao Meng
> Assignee: Siyao Meng
> Priority: Major
>
> Use TLA+ (via the Specula pipeline) to model and verify OM read consistency:
> follower read visibility under LINEARIZABLE and LINEARIZABLE_ALLOW_FOLLOWER,
> and the hsync lease commit path. Model check the specification and validate
> real OM traces against it. Bugs found by this effort are linked under this
> issue.
> h3. Run environment
> {noformat}
> Ozone commit: 9fbf9ee0cb1bd2f5f5d437b6719ebbe5309351fb
> Specula: v1.1.0 (commit c6aa3dfa)
> Agent/model: claude-code, Claude Opus 4.8 (1M context)
> {noformat}
> h3. Coverage
> ||Target||Effort||Guidance||Result||
> |om-follower-read|high|{{campaigns/ozone-9fbf9ee/targets/001-om-follower-read/.prompt-extra.md}}|3
> findings, all ENV_LIMITED High (HDDS-16435)|
> |om-hsync-lease-commit|high|{{campaigns/ozone-9fbf9ee/targets/003-om-hsync-lease-commit/.prompt-extra.md}}|No
> findings|
> h3. Reproduce
> {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 \
> "<target>|apache/ozone|Java|Use the target-specific .prompt-extra.md"
> {code}
> h3. Bugs (link via "Testing discovered")
> * (ENV_LIMITED, High) HDDS-16435: under LINEARIZABLE_ALLOW_FOLLOWER a read
> served by a superseded leader can return stale local state. Three related
> model checking findings (MC-1, MC-2, CR-2) share this root cause; reachable
> only in the allow-follower read configuration, so env-limited rather than
> reproduced.
> 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]
