Only BundleImporter.ApplyAsync released an import session, so every path that
opened one and did NOT apply held one of MaxConcurrentImportSessions (8) — and
the DECRYPTED bundle content that T-007 deliberately zeroes on the apply paths —
for the full BundleSessionTtlMinutes (30). Eight abandonments locked out all
imports on the active node; observed live (R6: 3 back-to-back suite runs held 6
of 8 slots until central-b was restarted).
New IBundleImporter.Abandon(sessionId): the same zero-then-remove release
ApplyAsync performs, idempotent (double release / unknown id / expired id are
no-ops) and only ever given the random-GUID id its caller opened, so it can
never evict another circuit's session.
Wired into every abandonment path:
- Central UI wizard — ReleaseSession() from new upload, TryLoadAsync (before it
overwrites _session), Back-to-Upload / ResetSessionState, the 3-strike lockout
reset, and Dispose (navigation away / circuit teardown).
- CLI transport preview — a preview never applies, so nothing released it at
all; now released in a finally.
- CLI transport import — covers the pre-apply aborts (blocker rows, unresolved
site/connection mappings).
Class doc's "an abandoned wizard does not leak" claim is true again (it only
ever covered the staged plaintext temp file). Component-Transport.md +
docs/components/Transport.md now record the explicit-release contract and that
BundleSessionEvictionService is a TTL backstop, not an abandonment path.
Tests: 4 bUnit tests over a REAL BundleSessionStore (dispose / back-to-upload /
apply-then-dispose idempotency / concurrent-circuit isolation) — 3 of the 4 fail
against the pre-fix page; 4 importer tests (release + zeroing, idempotency,
cross-session isolation, and the slot-cap regression).
Joseph Doherty