JCU/fix: prevent orphaned items - abort leaked request Context (backport #1352 to jcu)

[jr-rk]

Problem

On this customer branch a submitted item can silently become orphaned — owning_collection = NULL, in_archive = false, while its collection2item mapping and handle survive — so it vanishes from search/listings, has no breadcrumb, and "Edit Item" throws HTTP 500. Tracking issue: #1353. Source: #1352 (and original dc57ffded8 / #852).

Root cause

On the request error path a slow submission upload throws before context.commit(). DSpaceRequestContextFilter assigns its context local only after chain.doFilter(...), so on an exception the local stays null and its finally skips the abort → the Hibernate session leaks, still bound to the Tomcat thread holding a dirty, stale Item. A later request on that thread flushes the stale Item as a full-row UPDATE (Item has no @DynamicUpdate/@Version), reverting owning_collection → NULL / in_archive → false.

Change set

Backport of the single behavioral hunk from dc57ffded8 (as shipped to customer/zcu-data in #1352, commit ea6116ebec1): the outer StatelessAuthenticationFilter now wraps chain.doFilter(...) in try/finally and, in the finally, reads the Context from req.getAttribute(ContextUtil.DSPACE_CONTEXT) and abort()s it when still valid — cleaning up the leaked context the inner filter missed. No-op on the success path (request already committed → context no longer valid). One file, +17/-1; no new imports (Context/ContextUtil/log already present). Diagnostic/CI files from dc57ffded8 intentionally omitted.

Test evidence

# Cherry-pick applied cleanly (identical context) onto this branch.
# Added-hunk signature identical (b8c3482c8bdc) to the CI-green source commit ea6116ebec1 (#1352).
# Full module build + checkstyle + tests run in this PR's CI.

Risk & rollback

Very low: 17-line change, no schema/API change, success path is a no-op; identical to code already merged on dtq-dev / customer/zcu-data / customer/vsb-tuo / customer/lindat. Rollback = revert this single commit; no data migration.

Notes / assumptions

Behavioral-only backport. Defense-in-depth follow-ups are tracked separately in #1353 (null-local fix in DSpaceRequestContextFilter; @DynamicUpdate/@Version on Item/DSpaceObject; read-path 500 guard #1348).

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[Copilot]

Pull request overview

This PR backports a defensive cleanup to prevent orphaned items caused by leaked, thread-bound Hibernate sessions on the request error path. It wraps the request filter chain in StatelessAuthenticationFilter with a try/finally and aborts any still-valid Context stored on the request to ensure transactions/sessions don’t leak across requests.

Changes:

• Wrap chain.doFilter(req, res) in try/finally within StatelessAuthenticationFilter.
• In finally, attempt to abort a still-valid Context retrieved from the request attribute (ContextUtil.DSPACE_CONTEXT) to clean up leaked request contexts.

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[Copilot]

Pull request overview

Copilot reviewed 1 out of 1 changed files in this pull request and generated no new comments.

[milanmajchrak]

This is fixed by Vanilla.