Siyao Meng created HDDS-16440:
---------------------------------
Summary: DirectoryDeletingService can NPE on a transient Ratis
submit failure (masked by BackgroundService catch)
Key: HDDS-16440
URL: https://issues.apache.org/jira/browse/HDDS-16440
Project: Apache Ozone
Issue Type: Bug
Reporter: Siyao Meng
h3. Finding
A missing null check turns a tolerated transient Ratis submit failure
(ServiceException producing a null response) into an uncaught NPE dereferencing
resp.getSuccess() in the DirectoryDeletingService background task. Masked by
BackgroundService.run()'s unconditional catch(Throwable), which logs and
reschedules next interval, and nothing durable is written; absent that guard
the NPE would abort the run and risk stalling the periodic deletion loop
(liveness, no data corruption).
h3. Classification
* Verdict: MASKED
* Severity: Medium
* Source: Specula TLA+ model checking and confirmation debate, finding CR-5
h3. Reproduce
{noformat}
Ozone commit: 9fbf9ee0cb1bd2f5f5d437b6719ebbe5309351fb
Specula: v1.1.0 (commit c6aa3dfa)
Target: om-fso-recursive-deletion
Guidance:
campaigns/ozone-9fbf9ee/targets/005-om-fso-recursive-deletion/.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
\
"om-fso-recursive-deletion|apache/ozone|Java|Use the target-specific
.prompt-extra.md"
{code}
Discovered under HDDS-16429 (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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