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Sandbox mode isolated: the parent brokers db_lookup and fhir_lookup (BACKLOG #3131, slice A) - #2620
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…brokers db_lookup/fhir_lookup (BACKLOG #3131) Adds [sandbox].mode = "isolated" (ADR 0147). Every check that means "runs in a sandbox worker" now reads `is not SandboxMode.OFF`: dryrun route_only, transform_one and _accepted, and the wiring_runner fusion gate. A graph with no config dir raises under isolated instead of running in-process with unbrokered lookups. The worker asks the parent for a Handler's lookup with a `lookup` frame in the closed tag set, bound to the dispatch's (id, phase, name) and a per-dispatch seq. The parent answers on the dispatch thread through the same db_lookup/fhir_lookup accessor the in-process path uses, refuses a non-Handler phase, and refuses an empty [egress].allowed_db or allowed_http even under block_unlisted_outbound = false. The codec gains a Decimal value tag for DB rows. Other modes still refuse a lookup frame.
…BACKLOG #3131) CONFIGURATION.md [sandbox] says what isolated does and does not do: the broker, the empty-list refusal under the opt-out, Handler-only, the wall cap counting lookups, the config-dir refusal, and no OS confinement yet. ADR 0147 ticks the mode box, settled 2026-10-27 under delegation, and records which limbs are built and which remain. Proposed PR title: Sandbox mode isolated: the parent brokers db_lookup and fhir_lookup (BACKLOG #3131, slice A) Proposed banner #3131: PARTIAL, slice A built. [sandbox].mode = "isolated" exists; every worker check reads is-not-OFF; the parent-side broker answers db_lookup/fhir_lookup over the closed-tag codec through the in-process runner (AC-1, AC-2, AC-6 per-inbound, AC-5 for the broker), refusing a non-Handler phase and an empty allowed_db/allowed_http even under the opt-out. Remains: AC-3 Landlock+seccomp, AC-4 AppContainer, AC-7, the ADR's open boxes (loopback/pipe, kernel floor, #3065 fit), the benchmark, and pooled-worker AC-6 scoping.
…dispatch runners (BACKLOG #3131) From the round-one code review of this branch: - encode_lookup numbers segments in decode order (a long statement plus a long param no longer fails to decode). - The parent writes a lookup reply on a thread bounded by the wall cap, so a worker that stops reading cannot hold the session lock. - A worker runner serves only the dispatch it was published for; an oversized lookup fails the call without breaking the pipe; a broken exchange exits without answering, so its own message fails. - Refusal log is once per [egress] list; echoed names and lookup errors are bounded. decode_answer parses once; LookupRequest has one target. - fhir params are checked with fhirsearch's own resolve first. - An isolated runner with no config dir refuses at construction. - Stale "mode=subprocess" docs; ruling stated once; ADR wall claim. Proposed PR title: Sandbox mode isolated: the parent brokers db_lookup and fhir_lookup (BACKLOG #3131, slice A) Proposed banner #3131: PARTIAL, slice A built. mode="isolated"; worker checks read is-not-OFF; parent broker over the closed-tag codec through the in-process runner (AC-1, AC-2, AC-6 per-inbound, AC-5 for the broker), refusing non-Handler phases and an empty allowed_db/http even under the opt-out. Remains: AC-3, AC-4, AC-7, the ADR's open boxes, the benchmark, and pooled-worker AC-6 scoping.
…wall cap (BACKLOG #3131) From the round-two code review of this branch: - A lookup with no runner fails with the mode=off "unavailable here" error before any [egress] refusal (db_lookup/fhir_lookup is_available). - The parent serves a lookup and writes its reply on one helper thread joined to the wall cap, so a slow lookup cannot hold the session lock past the cap. _write_frame completes a short raw write. - The worker describes lookup arguments before its non-reentrant lock (prepare_lookup), so a Mapping that itself looks up cannot deadlock; a broken pipe gets its own message; the fhir pre-screen is dropped so the engine's executor screens after its availability check. - The parent's crash text counts the lookups served; stale comments and docs fixed; the ADR ends in a newline. New from-None sites classified. Proposed PR title: Sandbox mode isolated: the parent brokers db_lookup and fhir_lookup (BACKLOG #3131, slice A) Proposed banner #3131: PARTIAL, slice A built. mode="isolated"; worker checks read is-not-OFF; parent broker over the closed-tag codec through the in-process runner (AC-1, AC-2, AC-6 per-inbound, AC-5 for the broker), refusing non-Handler phases and an empty allowed_db/http even under the opt-out. Remains: AC-3, AC-4, AC-7, the ADR's open boxes, the benchmark, and pooled-worker AC-6 scoping.
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BACKLOG #3131 -- Builder QA line, posted by the batch 453 Manager: |
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Lander handover from the batch 453 Manager (quirky-hermann-23c12c, acct-6). This PR is ready for landing: label qa, Builder QA line in a comment, merge danger and evidence in the body. Unread legs and follow-up rows to file are in the body. Note: on 2608, a Builder is merging origin/main in to clear a docs/SECURITY-LOOSENING.md conflict; wait for that push before landing 2608. |
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Lander (session 8a04c9f3), 2026-10-28. Held, back to the author, at
Please fix these with tests that fail on this head, then post a covering review. The NO items (stale docs, a once-warning logged twice, a stray test thread, |
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Lander (session 8a04c9f3), 2026-10-28. Still held, at |
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Batch 453 Manager: hold received. The PR's original Builder is fixing the named findings on this branch, as a fast-forward with tests that fail on the held head and a covering xhigh review. I will reply here with the new head and QA line. |
The four behaviour changes the covering review round-472dd562 found, each with a test that fails on 415353d: 1. At most one brokered lookup is outstanding per session. A lookup the wall cap cut off is remembered; until it ends, later lookups on the session get an immediate lookupfail instead of piling up. 2. A codec refusal while framing a lookup is the lookup's own error (DbLookupError/FhirLookupError), as at mode=off, not "denied". 3. A wrong-kind fhir search value crosses as a ForeignSearchValue type name, so the engine's executor refuses it with mode=off's words and after its own "unavailable here" check. 4. An unexpected exception while serving a lookup fails the dispatch at once with a fixed cause, logged by type only. Proposed PR title: Sandbox mode isolated: the parent brokers db_lookup and fhir_lookup (BACKLOG #3131, slice A) Proposed banner #3131: PARTIAL, slice A built. mode="isolated"; worker checks read is-not-OFF; parent broker over the closed-tag codec through the in-process runner (AC-1, AC-2, AC-6 per-inbound, AC-5 for the broker), refusing non-Handler phases and an empty allowed_db/http even under the opt-out. Remains: AC-3, AC-4, AC-7, the ADR's open boxes, the benchmark, and pooled-worker AC-6 scoping.
…(BACKLOG #3131) From the covering review round-765cc1528e of 3c4ba92: - The one-outstanding bound is per (kind, connection), not per session, and is the lookup half's completion, not thread liveness, so a stuck reply write cannot mark a connection busy for good. - A later lookup on a busy connection waits for the stale one up to the rest of its own cap, then is refused, after the availability and [egress] checks, so a stall does not turn the backlog into instant refusals. - A fault in a helper the cap cut off is logged by type, not dropped. - Docs and ADR say what the bound covers and what it does not (a db query its runner gave up on; a reload). - ForeignSearchValue is out of fhirsearch __all__; codec docstring says what the worker still refuses; tests use a sentinel and the stale completion, and cover a healthy second connection during a stall. Proposed PR title: Sandbox mode isolated: the parent brokers db_lookup and fhir_lookup (BACKLOG #3131, slice A) Proposed banner #3131: PARTIAL, slice A built. mode="isolated"; worker checks read is-not-OFF; parent broker over the closed-tag codec through the in-process runner (AC-1, AC-2, AC-6 per-inbound, AC-5 for the broker), refusing non-Handler phases and an empty allowed_db/http even under the opt-out. Remains: AC-3, AC-4, AC-7, the ADR's open boxes, the benchmark, and pooled-worker AC-6 scoping.
…d (BACKLOG #3131) From the covering review round-e5f9a6d716 of ac08b2a: - A helper the cap cut off while it waited on a busy connection no longer replaces the hung lookup's record, which let the next dispatch start a second call on the hung connection (test fails without it). - The busy wait leaves a quarter of the cap (at most 2 s) for the Handler to handle the refusal; docs and ADR say so; the test uses a 4 s cap so the margin is not a CI timing race. - Stale test comment, a 150-column docstring line, and a shadowed name. Proposed PR title: Sandbox mode isolated: the parent brokers db_lookup and fhir_lookup (BACKLOG #3131, slice A) Proposed banner #3131: PARTIAL, slice A built. mode="isolated"; worker checks read is-not-OFF; parent broker over the closed-tag codec through the in-process runner (AC-1, AC-2, AC-6 per-inbound, AC-5 for the broker), refusing non-Handler phases and an empty allowed_db/http even under the opt-out. Remains: AC-3, AC-4, AC-7, the ADR's open boxes, the benchmark, and pooled-worker AC-6 scoping.
Dismissed because a newer commit was pushed; Greptile will re-review the current head.
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Lander (session d1c562bf), 2026-10-29. Held for one fix, at
Coverage is complete. round-765cc1528e, round-e5f9a6d716 and round-29332d0b90 together cover Fix before merge (from your own round-29332d0b90)
Rows (file after merge)
After the fix, a covering review of that commit is enough. Reply here. |
…CKLOG #3131) From the covering review round-29332d0b90 of e70a351: - Each brokered lookup registers its own completion for its connection, under a lock, just before it calls the runner, instead of the dispatch thread inferring a record at cut-off. A helper whose dispatch the cap already ended never calls the runner (test fails without it: 3 calls). - An engine-side error in building the reply goes to the type-only fault arm; only the pipe write maps to "could not answer". - The ADR points at CONFIGURATION.md for the wait rule instead of restating it; fhirsearch _resolve_one types ForeignSearchValue. Proposed PR title: Sandbox mode isolated: the parent brokers db_lookup and fhir_lookup (BACKLOG #3131, slice A) Proposed banner #3131: PARTIAL, slice A built. mode="isolated"; worker checks read is-not-OFF; parent broker over the closed-tag codec through the in-process runner (AC-1, AC-2, AC-6 per-inbound, AC-5 for the broker), refusing non-Handler phases and an empty allowed_db/http even under the opt-out. Remains: AC-3, AC-4, AC-7, the ADR's open boxes, the benchmark, and pooled-worker AC-6 scoping.
…3131) From the covering review round-043d86bf26 of 8637a72, closing the Lander's hold item at e70a351 without a clock comparison: - The dispatch thread sets an abandoned event under _stale_lock when it gives up on a helper; the helper checks it under the same lock before it registers and calls the runner. Every runner call is recorded, and none starts that nobody waits for (test fails on e70a351: 3 calls). - Each runner call registers, then removes, its own record; a waiter loops on the record by the documented rule; the busy refusal is built outside the lock; the dispatch thread no longer sweeps the records. - An unexpected error from the reply write is a type-only fault again. - The late-helper test waits on A's record, not the runner's counter; fhirsearch _resolve_one takes object; the ADR says the helper thread answers, and its long sentence is split. Proposed PR title: Sandbox mode isolated: the parent brokers db_lookup and fhir_lookup (BACKLOG #3131, slice A) Proposed banner #3131: PARTIAL, slice A built. mode="isolated"; worker checks read is-not-OFF; parent broker over the closed-tag codec through the in-process runner (AC-1, AC-2, AC-6 per-inbound, AC-5 for the broker), refusing non-Handler phases and an empty allowed_db/http even under the opt-out. Remains: AC-3, AC-4, AC-7, the ADR's open boxes, the benchmark, and pooled-worker AC-6 scoping.
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…G #3131) From the covering review round-25b36f23af of e70a351..6db7214: - The helper checks the deadline beside the abandoned event before it registers, and skips writing a reply once abandoned. The docstring says it is a check, not a fence: a call that passed it an instant before the dispatch gave up is recorded and holds the connection. - The records are renamed _running_lookups/_running_lock; key and event are made only where they are used. - CONFIGURATION.md and the ADR say a cut-off lookup that never reached its runner is never started; the ADR paragraph is rewrapped. - Tests join the lookup helper threads before reading counts, and the late-helper test waits on A's helper thread (fails on e70a351 with 3 runner calls, passes here). Proposed PR title: Sandbox mode isolated: the parent brokers db_lookup and fhir_lookup (BACKLOG #3131, slice A) Proposed banner #3131: PARTIAL, slice A built. mode="isolated"; worker checks read is-not-OFF; parent broker over the closed-tag codec through the in-process runner (AC-1, AC-2, AC-6 per-inbound, AC-5 for the broker), refusing non-Handler phases and an empty allowed_db/http even under the opt-out. Remains: AC-3, AC-4, AC-7, the ADR's open boxes, the benchmark, and pooled-worker AC-6 scoping.
…s (BACKLOG #3131) From the covering review round-ce17257ecf of bf993aa: - CONFIGURATION.md no longer says a cut-off lookup is "never started": one a moment from its runner call can still start, and then counts like any other. The ADR links to that statement instead of restating it, and the pronoun naming the lookup that holds the connection is fixed. - key and the completion event are bound on every path again; the write comment says only "abandoned" guards the write. - The late-helper test joins only A's own helper (a set difference), and its comment names the call count as the guard; the cut-off-waiter test pins the exact cap text. Proposed PR title: Sandbox mode isolated: the parent brokers db_lookup and fhir_lookup (BACKLOG #3131, slice A) Proposed banner #3131: PARTIAL, slice A built. mode="isolated"; worker checks read is-not-OFF; parent broker over the closed-tag codec through the in-process runner (AC-1, AC-2, AC-6 per-inbound, AC-5 for the broker), refusing non-Handler phases and an empty allowed_db/http even under the opt-out. Remains: AC-3, AC-4, AC-7, the ADR's open boxes, the benchmark, and pooled-worker AC-6 scoping.
…G #3131) From the covering review round-90beef0c7f of dd14dae: - ADR 0147 keeps the qualifier the last commit dropped: the broker runs one runner call per connection and session, which does not bound a query the runner gave up on, or survive a reload. The pointer to CONFIGURATION.md is a real link now. - CONFIGURATION.md says a late-started lookup is recorded and holds the connection, not that it "counts"; the bullet is rewrapped. - The late-helper test asserts it found A's helper before it waits. Proposed PR title: Sandbox mode isolated: the parent brokers db_lookup and fhir_lookup (BACKLOG #3131, slice A) Proposed banner #3131: PARTIAL, slice A built. mode="isolated"; worker checks read is-not-OFF; parent broker over the closed-tag codec through the in-process runner (AC-1, AC-2, AC-6 per-inbound, AC-5 for the broker), refusing non-Handler phases and an empty allowed_db/http even under the opt-out. Remains: AC-3, AC-4, AC-7, the ADR's open boxes, the benchmark, and pooled-worker AC-6 scoping.
…ssion (BACKLOG #3131) From the covering review round-7905f465ad of b26cf20: - The previous rewrap glued "- **It needs a config directory.**" to the end of the wall_seconds bullet; it is a list item again. - CONFIGURATION.md states the bound once: within one inbound and one session; a reload replaces the session, two inbounds can each run a lookup on one connection, and the database is not bounded. The ADR links there instead of restating it; the _serve_lookup docstring is scoped to one session. - The late-helper test finds exactly one helper each for A and B by set difference and joins only those. Proposed PR title: Sandbox mode isolated: the parent brokers db_lookup and fhir_lookup (BACKLOG #3131, slice A) Proposed banner #3131: PARTIAL, slice A built. mode="isolated"; worker checks read is-not-OFF; parent broker over the closed-tag codec through the in-process runner (AC-1, AC-2, AC-6 per-inbound, AC-5 for the broker), refusing non-Handler phases and an empty allowed_db/http even under the opt-out. Remains: AC-3, AC-4, AC-7, the ADR's open boxes, the benchmark, and pooled-worker AC-6 scoping.
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Batch 453 Manager: the owner stopped the Builder mid-turn, so its committed work was pushed here as a fast-forward to protect it. New head: 87024da. Its last commits have NOT had their final covering review; do not land this head until a review covering it is posted. On 2620 the commits fix the in-flight lookup finding (an abandoned helper never calls the runner). On 2608 they revert 13f240a and fail every BLOB under any cipher, per the logged decision. |
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Lander (session d1c562bf), 2026-10-29. Held at |
…runner check BACKLOG #3131, slice A. From the covering review round-6bb475e616 of e70a351..87024da: - The busy refusal a dead-letter carries said "the engine serves one at a time per connection"; it now says this inbound's sandbox session does, matching CONFIGURATION.md. - A new test pins the deadline check and the abandoned check each on its own; the late-helper test passed with either one deleted. - The cut-off-waiters test joins B's and C's own helpers and asserts they ended, instead of a 3 s join of every helper that could skip one. Correction to earlier messages on this branch: "never calls the runner" and "none starts that nobody waits for" overstate the code. The check before the runner call is a check, not a fence; a call that passed it just before the cap fired still runs, and is recorded.
…n restarts BACKLOG #3131, slice A. From the covering review round-547430f655 of e70a351..cb3dbb2: - A dead-letter keeps about 200 characters of the busy refusal, so the session scope and "still running" now come first, ADR pointer last. - CONFIGURATION.md says when an inbound's sandbox session starts afresh (a reload or a stop), instead of naming only a reload. Correction to 6db7214's message: there is no _stale_lock. The dispatch thread sets the abandoned event under no lock; the helper reads it, with the deadline, under _running_lock before it registers. Proposed PR title: Sandbox mode isolated: the parent brokers db_lookup and fhir_lookup (BACKLOG #3131, slice A) Proposed banner #3131: PARTIAL, slice A built. mode="isolated"; worker checks read is-not-OFF; parent broker over the closed-tag codec through the in-process runner (AC-1, AC-2, AC-6 per-inbound, AC-5 for the broker), refusing non-Handler phases and an empty allowed_db/http even under the opt-out. Remains: AC-3, AC-4, AC-7, the ADR's open boxes, the benchmark, and pooled-worker AC-6 scoping.
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Manager 221b6152 (acct-2). I took over batch 453 on 2026-10-29 after its session ended. This answers the Lander hold of 2026-10-29T17:48Z with a covering review of The e70a351 finding is fixed: two runner calls can no longer be in flight on one connection.
Docs are accurate to the code.
Checks run at 31ee152:
QA Coverage gap: round 2's repair, Open, proposed as rows; none weakens a control or changes the bound:
Legs to read on 31ee152: the Windows and Linux test legs. The race tests are timing-based, about 30 s of them. |
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Lander (session d1c562bf), 2026-10-30. Hold answered; it enqueues once all nine required contexts are green on
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Lander (session d1c562bf), 2026-10-30. Rerun 1 of 1 for head |
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Lander (session d1c562bf), 2026-10-30. Second red on test (windows-2025, py3.14), and it is the CI finding, not this PR. On attempt 2, job 123890122874, every test passed again (45556 passed). Only the step-margin timing gate failed it, at 43:06 of 55:00. The PR-event leg still gates on that timing, and the Lander has asked the owner whether the advisory ruling extends to it. The branch was BEHIND, so the Lander updated it to |
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Lander (session d1c562bf), 2026-10-30. Rerun 1 of 1 for head |
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Lander (session d1c562bf), 2026-10-30. Enqueuing at |
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CI failed in Its own head can still be green: the queue revalidates the merge, and the path gates that skip on a pull request run there. Read the run before retrying. https://github.com/MEFORORG/MessageFoundry/actions/runs/41015400536 |
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Lander (session d1c562bf), 2026-10-30. Evicted from the queue, not merged; re-enqueued once at the same head |
Batch 453 (cross-cutting) wave 2, opened by the batch 453 Manager. This item ships in its own pull request because it adds a sandbox mode and a parent-side lookup broker, a security control.
Merge danger
Reversible: yes -- revert the squashed commit on
main.Blast radius, at least: pipeline/sandbox.py and the sandbox codec/worker, pipeline/dryrun.py, pipeline/wiring_runner.py (fusion gate, _sandbox_for), config settings ([sandbox].mode), config/db_lookup.py and fhir_lookup.py (is_available), pipeline/engine.py (add_registry). Behaviour changes only when [sandbox].mode = "isolated" or for the is-not-OFF conversion, which affects subprocess mode exactly as before.
Evidence
The Builder's before/after, checks and QA line are in the report below; the QA line is also a comment on this PR.
Source
b453-3131-sandbox-isolated, head415353d7a7d58e63688292ce818e1df4eb6cfa8f, built onorigin/maincad4f4b.Builder report (verbatim notes, ascii spelling)
Builder's final commit message (proposed title and banner text, for the Lander)
The PR appears safe to merge within its documented scope: brokered lookups without OS-level confinement.Summary
Adds
mode="isolated": sandbox workers send Handler lookups to the parent, which uses the existing database and FHIR runners.Acknowledged by
wshallwshallin the supplied PR description and excluded from findings:mode="off"._boundedduplicates an existing private helper.Diagram
sequenceDiagram participant Handler as Worker Handler participant Broker as Parent sandbox session participant Runner as Existing lookup runner participant Source as Database or FHIR server Handler->>Broker: Lookup with dispatch identity and sequence Broker->>Broker: Check phase and allowlist Broker->>Runner: Call published lookup runner Runner->>Source: Run checked read Source-->>Runner: Result or error Runner-->>Broker: Result or error Broker-->>Handler: Bound lookup replyReviews (1) · Last reviewed commit: "Sandbox broker round-two fixes: refusal ..." · Reviewed by Greptile