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mulesoft / data-weave-cli Public

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@W-23692110: Multiple isolated DataWeave engines per process (Node + Python) - #157

#157

Open

mlischetti wants to merge 216 commits into

mastermulesoft/data-weave-cli:masterfrom

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Open

@W-23692110: Multiple isolated DataWeave engines per process (Node + Python)#157
mlischetti wants to merge 216 commits into
masterfrom
w-23692110-multi-engine-design

Commits

Commits on Sep 1, 2026

docs: add design for multiple isolated DataWeave engines per process

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91d1acb
W-23692110: handle-keyed ScriptRuntime registry with per-engine resolvers
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9e31543
W-23692110: per-engine resolver bridge and handle-based N-API methods
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ba50829
W-23692110: per-instance engine handles in Node binding + isolation regression test
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1015beb
W-23692110: fix native library ref-count leak on partial DataWeave.initialize() failure
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d776502
W-23692110: document independent per-instance engines
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4789129
W-23692110: Make Node engine bridge teardown safe against in-flight ops (F1, F2)

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27ec812
W-23692110: Reject invalid engine handles and fix resolver-buffer leak (F3, F4)
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5f070dd
W-23692110: Use bridge_finalize in create_engine_with_resolver reject path
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5475cbd
Require per-engine ABI symbols at load and align resolver log policy

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2d977d7
Make default resolver-error log fully content-free, not just message-free

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c71ac9f
test(node): add lifecycle/error coverage for F1/F4/F6 remediation
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2acaf2a
W-23692110: Add native-level test for unknown engine handle contract
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285d198
chore: remove PR-157 code review process notes from repo
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596eb8b
docs: add design for cleanup()-during-active-stream deadlock fix
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8ace020
Add process-global active-op accounting for streaming/transform
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ce6c5de
Make napi_cleanup async: defer isolate teardown until active ops drain
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32929fa
Block initialize() while an isolate teardown is pending
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58a0bcf
Fix signal-stealing deadlock: use broadcast instead of signal for op-completion wakeups
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df2f84a
Change DataWeave.cleanup() to return Promise<void>
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2fb7af7
Await the now-async DataWeave.cleanup() in existing tests
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b076526
Add cleanup()-during-active-stream/transform deadlock regression tests
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5e79ab8
Fix napi_initialize deadlock: decrement g_active_ops from the worker thread, not the JS-thread callback
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9a1843c
Document DataWeave.cleanup()'s Promise<void> signature
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4d134d0
W-23692110: Unwind pre-spawn state on streaming/transform worker spawn failure

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b8dd857
W-23692110: Roll back pending-teardown state on waiter spawn failure

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fa4d48d
fix(native-lib/node): signal read waiter on env==NULL teardown (F3)
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33d1418
W-23692110: Drain in-flight ops via beforeExit before exit fallback

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c2175ee
fix: reset cleanupStarted guard after singleton teardown completes

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5a172ea
fix(node): guard uv_thread_join on spawn-failure in three sync paths (F1)

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e228223
Fix resource leak in write-completion callbacks when env == NULL

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cc46a20
Only clear global isolate state in teardown_waiter_thread_fn on success
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24fca45
W-23692110: Clear initialized in finally so a failed cleanup() doesn't strand DataWeave
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a44707f
Fix dead-env napi_ref deletion and orphaned-isolate cleanup race
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e445038
fix(node): finalize worker-side state when the completion sentinel enqueue fails (F1)

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3a1d38d
fix(node): drop tsfn releases already discharged by napi_closing (F1 follow-up)

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78e4a79
Fix(node): guard cross-thread destroyEngine for resolver-backed engines (F2)

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b5c779f
fix(node): check N-API allocation results in teardown_waiter_create (F3)

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47ee6a5
fix(node): coalesce concurrent DataWeave.cleanup() calls (F1)

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ab2e47c
Fix F2: Free the teardown waiter when its completion enqueue fails

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8799f76
Fix napi_initialize deadlock: adopt live isolate during pending teardown

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e5e693e
Add deterministic regression test for napi_initialize teardown deadlock

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d9146b6
docs: design spec for round-6 instance-lifecycle-state fix (W-23692110)

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3a0526e
fix(node): model DataWeave instance lifecycle explicitly (round-6 #1/#3)

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2e3e340
fix(node): coalesce cleanup() before the not-ready guard (task-1 review fix)

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01b1136
fix(node): make stream/transform admission atomic under g_mutex (round-6 #2)

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dfa7563
fix(node): validate napi_get_value_int64 at handle-read sites (round-6 #1)

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5b33e03
fix(node): balance ffi.initialize()/cleanup() in handle-validation test

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f5dcde7
docs: design spec for round-7 FFI admission & conversion sweep (W-23692110)

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792c582
fix(node): reserve g_active_ops across run() isolate window (round-7 #1)

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29552e8
fix(node): admit adopted-but-cancelled isolates at all 3 FFI admission sites

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a24af59
fix(node): check every napi_get_value_* status in FFI entrypoints (round-7 #2)

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9de97a7
docs(node): await async cleanup() in external-modules examples (round-7 #3)

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49c8014
docs: design spec for round-8 OOM-safe streaming/transform setup (W-23692110)

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8077355
fix(node): NULL-check allocations in streaming/transform setup (round-8 P1)

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1d520ee
docs: mark ga-cleanup backlog item 6 resolved by round-8 OOM fix (W-23692110)

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b4ccb52
docs: round-9 design spec — engine lifecycle & worker-OOM hardening

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ff78150
docs: correct round-9 spec — #1 is not deterministically testable

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f34dd47
fix(node): OOM-safe worker/callback allocations (round-9 P2)

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2d4ced4
fix(node): check N-API resource creation after reservation (round-9 P3)

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7030569
fix(node): defer engine registry removal until admitted ops drain (round-9 P1)

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0e45c2a
docs(node): fix stale bridge comments after round-9 all-engines record (#1)

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fd49179
W-23692110: Remove Java registry entry during Worker/env teardown (round 10 P1) + fix shutdown doc (P2)

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d9bde0e
docs: round-10 design spec (worker-teardown dangling resolver ctx + shutdown doc)

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c9989b8
docs: round-11 design spec (engine-pin at admission + all-engines cleanup hook)

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66f7a92
W-23692110: Extract bridge_begin_op_locked for atomic admission-time engine pin

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08078ce
W-23692110: Pin engine in the admission transaction for streaming/transform (round 11 #2)

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811e8a1
W-23692110: Pin the engine for synchronous runScriptEngine (round 11 #3)

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166430e
W-23692110: Register env cleanup hook for every engine + extend owner-thread destroy guard (round 11 #1)

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cb6a061
W-23692110: Register process exit hooks once, not per singleton (round 11 #5)

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8cc056d
W-23692110: Node integration tests for *_engine unknown/destroyed-handle contract (round 11 #6)

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5002795
W-23692110: Fix initialize/cleanup ref-count imbalance in engine-handle-contract.test.ts (round 11 #6 fix-loop 1)

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bdf103a
W-23692110: Fix two cleanup() doc bugs in Node README (round 12 #7)

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9715e91
W-23692110: Add round-12 design spec (worker ref-leak & teardown-race hardening)

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a6f335b
W-23692110: Amend round-12 spec #3 to transient-reservation mechanism

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78d78b1
W-23692110: Extract release_isolate_ref_locked from napi_cleanup (round 12 #2 prep)

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e04570f
W-23692110: Split bridge_finalize; guard registry attach with transient g_active_ops reservation (round 12 #3)

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8756d15
W-23692110: Release the init reference on abandoned-env teardown (round 12 #2)

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9e1e11e
W-23692110: Document the 1:1 initialize<->engine-bridge assumption (round 12 #2 review)

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e839c7c
W-23692110: Re-check readiness in runTransform after input pre-buffering (round 12 #4)

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b7784e6
W-23692110: Make engine creation all-or-nothing on cleanup-hook failure (round 12 #6)

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a26e119
W-23692110: Fix double-release of init ref in engine-creation hook-failure path (round 12 #6 fix round 1)

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7ef7547
W-23692110: Coalesce overlapping module-level cleanup() calls (round 12 #5)

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8a038fe
W-23692110: Require success for the admitted run-vs-destroy ordering (round 12 #8)

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d7c4464
W-23692110: Add worker_threads lifecycle integration suite (round 12 #9)

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6ed316b
Fix module-level cleanup() orphaning a revived singleton; harden terminate() test

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3c7c1dd
W-23692110: Add round-13 design spec (per-env init-reference ownership, review #5)

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5d59364
W-23692110: Add per-env init-reference record and helpers (round 13 #5 prep)

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4d69a04
W-23692110: Add bounded isolate_ref_release_n_locked; core release wraps n=1 (round 13 #5 prep)

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7660c17
W-23692110: Acquire a per-env init reference in initialize() at all three sites (round 13 #5)

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0963c34
W-23692110: Add env_init_cleanup env-death hook releasing a dead env's references (round 13 #5)

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4f19b22
W-23692110: Stop the per-engine cleanup hook from releasing the init reference (round 13 #5)

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e67a3d6
W-23692110: Gate cleanup() on the calling env's init-reference ownership (round 13 #5)

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a07358c
W-23692110: Add per-env init-reference ownership integration tests (round 13 #5)

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aeb2837
W-23692110: Tear down the just-built isolate on create-path init-record acquire failure (round 13 #5)

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714767a
W-23692110: Design spec for review #5 remediation (round 14)

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79bf229
W-23692110: Gate engine creation on ownership + teardown state + op reservation (round 14 #1)

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d29bb3f
W-23692110: Retry stranded teardown so a failed last-release cannot orphan a live isolate (round 14 #2/#3)

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cec5195
W-23692110: Arm the retry signal in release_isolate_ref_locked Case 4 (round 14 follow-up)

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7d68294
W-23692110: Release the native init reference even when destroyEngine() throws (round 14 #6)

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0b028d3
W-23692110: Reject every nonzero Worker exit in the test helper (round 14 #5)

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6cc6fd5
W-23692110: Add cross-env Worker regression pinning the round-12 over-release (round 14 #4)

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f76eb39
W-23692110: Add await dw.cleanup() to resolver quick-start docs (round 14 #7)

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d67ae93
docs: add review #6 remediation design spec (round 15)

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586e411
chore: stop tracking local scratch docs (review notes + ga-cleanup backlog)

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ceeb66f
fix(node): construct-then-publish module singleton (review #6 #1)

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18e82fa
fix(node): surface rejected native stream start instead of hanging (review #6 #2)

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d85a266
fix(node): honor graal teardown return code + arm async-waiter strand (review #6 #3/#4)

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827fce1
fix(node): complete a stranded teardown from the next initialize() (review #6 #5)

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ee92f27
test(node): surface worker destroy errors + isolate cross-env test state (review #6 #6/#7)

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3e81b48
test(node): assert reinitialization actually re-creates the engine (review #6 #8)

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15268e1
docs: review #7 remediation design spec (W-23692110)

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c68bd3f
fix(node): detach the phantom GraalVM thread on a failed teardown (review #7 #1)

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789a93f
fix(node): arm retry after a failed init-hook rollback so reinit cannot wedge (review #7 #2)

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e147c8b
fix(node): observe the initialize() rollback release and gate reinit on it (review #7 #3)

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b7582f3
fix(node): track native stream rejection by settlement state, not value (review #7 #6)

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40e046b
test(node): fail worker-lifecycle test when balancing cleanup fails on a passing body (review #7 #7)

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docs(node): state the final-reference condition in instance cleanup() docs (review #7 #5)

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29ef4b9
docs: update root README Node cleanup examples to await + accurate hooks (review #7 #4)

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4507caf
docs(node): correct the #2 retry comment — transient-only recovery, no fast-path adoption (review #7 final)

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ceae7c8
fix(node): fail deterministically instead of deadlocking after a stranded-teardown retry (review #8 #1)

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c3e803b
fix(node): survive a synchronous rollback ffi.cleanup() throw in initialize() (review #8 #2)

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13f636e
test(node): always release the native init reference when destroyEngine throws in the worker-lifecycle balance (review #8 #3)

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377d478
docs(node): capture streaming terminal metadata via manual next() iteration, not generator.return() (review #8 #4)

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c9bbd12
docs(node): correct runTransform input-streaming memory claims (async input is pre-buffered) (review #8 #5)

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76acdf1
docs(node): show required cleanup() in resolver examples (review #8 #6)

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e406fe2
docs: qualify root README cleanup drain as final-reference-only (review #8 #7)

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test(node): suppress balancing cleanup error too when the worker-lifecycle body already failed (review #8 final)

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a52b433
docs(node): soften Streaming Large Files bounded-memory claim (readFileSync holds full file) (review #8 final)

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test(node): assert re-init actually re-invokes createEngine, not the failed attempt's stale call (review #9 #1)

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9bda0da
test(node): retain and await the resolver cleanup-race promise in try/finally (review #9 #3)

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fea19cf
test(node): surface instance-lifecycle cleanup() failures when the test body passed (review #9 #4)

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2774466
test(node): assert Worker references were released via the not-initialized ref-count proxy in both Worker cleanup tests (review #9 #2)

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81c1842
fix(node): reject non-null non-string inputCharset at the transform boundary; cover malformed streaming/transform raw-ffi args (review #9 #6)

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docs(node): fix invalid import-before-%dw headers, sync-run blocking claim, transform memory qualification, and charset type (review #9 #5)

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3203d93
docs: consolidate multi-engine design into single final-state doc

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19a3ea6
docs(specs): unify Node & Python on one handle-based engine model, remove ScriptRuntime singleton

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0b7714e
refactor(native-lib): remove ScriptRuntime singleton and legacy C entrypoints (W-23692110)

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feat(python): add ctx argument to RESOLVE_MODULE_CALLBACK for per-engine dispatch (W-23692110)

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feat(python): shared refcounted isolate with handle-addressed engines (W-23692110)

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fix(python): route engine create/destroy through per-OS-thread isolate attachment (W-23692110)

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feat(python): per-engine resolver ctx trampoline with owner-thread fail-closed guard (W-23692110)

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731ec38
feat(python): route DataWeave execution through the engine handle; resolver bound at init (W-23692110)

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e4ab709
test(python): multi-instance refcount teardown regression (W-23692110)

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b8ad180
refactor(node): remove legacy run_script path; engine ABI only (W-23692110)

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docs: correct Python notes + add shared engine-lifecycle contract (W-23692110)

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2cfeda3
fix(python): detach isolate bootstrap thread + attach-on-demand so cross-thread teardown cannot hang; unregister resolver token on failed init (W-23692110)

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docs: align teardown-failure + Python-isolation notes with the shipped impl (final review #3)

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docs: consolidate Node + Python multi-engine designs into one spec

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ee802eb
refactor(native-lib): add no-arg ScriptRuntime constructor for built-ins-only engines

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test(node): assert throwing-resolver run() surfaces an error message

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a984dd2
fix(python): roll back resolver token when _acquire_isolate fails during initialize (review #10 #3)

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ea6b1ca
fix(python): retain live isolate and retry on failed teardown instead of nulling globals (review #10 #3, align with Node)

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test(python): reset _teardown_needed and _lib_path in unit conftest's isolate-state clear (review #10 #3 fast-follow)

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1130a39
fix(python): tear down just-created isolate on bootstrap-detach failure (review #10 #3)

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94e50c6
fix(python): make resolver-backed DataWeave.initialize() idempotent (review #10 #8)

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450a04e
fix(python): serialize per-instance initialize()/cleanup() to prevent engine/isolate over-count (review #10 #2)

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ce67fd0
fix(node): retain engine bridge when destroy is skipped on attach failure (review #10 svacas P1)

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4389613
fix(node): pre-allocate streaming/transform completion sentinel so OOM fails synchronously instead of hanging the promise (review #10 svacas P2)

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545cba7
fix(node): validate raw napi_initialize lib-path argument (review #10 #5, svacas P2)

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fix(node): guard unknown/torn-down handle cleanup against attaching a dead isolate; document deliberate cleanup()-resolves-on-teardown-failure (review #10 #5)

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973e846
fix(java): cancel-then-join transform feeder before returning so a slow read callback cannot be invoked after callback state is freed (review #10 #1 Critical)

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test(node): mark only the TCK output-equality assertion as expected-fail, not the whole test body (review #10 #6)

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test(node): recategorize 6 execution-failure TCK cases from output-mismatch xfails to documented skips (review #10 #6)

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test(node): fail the dedicated TCK job when the corpus is absent/empty (review #10 #7)

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ci(node): require a staged TCK corpus on the dedicated master TCK lane (review #10 #7)

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docs: document custom-module resolution scope (run() only) and record round-10 hardening in the multi-engine design (review #10 #4)

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test(node): sync tck-policy counts to recategorized ignore-list (38/15); reword CI comment to not trip ci-structure substring check (review #10 #7 #9 follow-up)

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test(node): record empirically-verified execution-failure evidence for the 3 recategorized multipart TCK cases (final review Low-1)

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fix(native-lib): close input session and convert exceptions to error envelope in transformViaCallbacks (review #11 #1)

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fix(native-lib): reject out-of-range input callback lengths instead of OOB/silent EOF (review #11 #4)
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fix(python): detach teardown worker on failed isolate teardown so cross-thread retry can proceed (review #11 #2)
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fix(python): guard module-level global engine creation/cleanup with a lock (review #11 #3)
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fix(native-lib): fail closed on malformed input JSON instead of executing on partial bindings (review #11 #5)
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test(tck): run known execution failures as strict expected failures instead of skips (review #11 #7)
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test(tck): table-driven policy checks for expected-execution-failure scenarios (review #11 #8)
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docs(native-lib): correct feeder-error read comment to state the volatile-read guarantee (review #11 final)

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fix(native-lib): join input feeder before reading its terminal error in transformViaCallbacks (review #12 #1)

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test(native-lib): add regression guard for join-before-getError ordering (review #12 #1 round 1)

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fix(python): serialize resolver install and engine init under a per-instance lifecycle lock (review #12 #2)

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fix(node): keep the owner-env cleanup hook for stranded resolver bridges so napi_ref is deleted on the owner thread (review #12 #3, #13)

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fix(node): remove the env cleanup hook on the destroyEngine defer path to close the double-owner window (reviews #12 #3, #13 round 1)

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f863620
test(node): replace crashing terminate-mid-flight regression with honest robustness smoke; document env-dead defer path is unreachable from JS (reviews #12 #3, #13 round 2)

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711b2f3
fix(python): retain the bootstrap thread on double-failure so teardown retry can succeed (review #13)

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docs(native-lib): correct stale isolate-lifecycle and run_script ABI references (review #12 #4 #5)

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test(python): update README lifecycle guard to the corrected shared-isolate wording (review #12 #4)

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fix(native-lib): remediate review #14 — test hermeticity + lifecycle doc accuracy

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fix(python): stop reusing the bootstrap IsolateThread across OS threads (review #15 #1)

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fix(native-lib): stop feeder-join busy-spin when the cleanup caller is interrupted (review #15 #2)

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docs(spec): align §10 Python teardown-failure behavior with retained/retryable model (review #15 #3)

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test(native-lib): fix feeder late-failure tests racing their own cancel signal

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fix(native-lib): treat a -1 read-callback status as a terminal feeder error (review #16 #1)

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fix(python): leak-and-continue when teardown recovery cannot detach its worker (review #16 #2)

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docs(spec): redefine the refcount invariant; document the zero-count leak window (review #16 #3)

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357e057
docs(python): correct the stale refcount/isolate invariant in native.py's header (review #16 #3)

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fix(node): leak-and-continue on the teardown-plus-detach double failure (review #17 #1)

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docs(node): refresh a stale torn_down comment left after the CLEANUP_RETAIN rename (review #17 #1)

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dcff255
docs(spec): correct the over-claim that Python needs none of Node's retry machinery (review #17 #2)

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docs(native-lib): document the unrecoverable teardown-plus-detach leak contract (review #17 #3)

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docs(resolver): mark the stale Python resolver design superseded (review #17 #4)

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docs(spec): document the Node unrecoverable teardown-leak branch in §6 (review #17 final)

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docs(native-lib): make the ordinary-teardown-failure retry trigger binding-specific (review #18 #1)

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docs(node): clarify cleanup() guarantees the teardown attempt, not physical reclamation (review #18 #2)

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docs(native-lib): correct cleanup() to state a teardown attempt, not physical reclamation (review #19 #1 #2)

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docs(spec): mark 2026-08-04 Node external-modules design superseded (review #19 #3)

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15f5302
docs(node): fix stale lifecycle comments and dead report refs (review #20 low-pri)

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9064176
fix(node): fail init if bootstrap detach fails instead of publishing a poisoned isolate (review #20 #1)

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fix(node): detach teardown-waiter threads so their OS handles are reclaimed (review #20 #2)

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fix(node): require graal detach/teardown symbols so the bootstrap-detach guard cannot short-circuit (review #20 final)

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docs(spec): fix resolver arg order and teardown-completion overpromise (review #21 #3 #4)

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fix(node): require graal_attach_thread symbol so a lib missing it fails init instead of crashing createEngine (review #21 #2)

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fix(node): poison the isolate on an ordinary detach failure so teardown leaks instead of hanging (review #21 #1)

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test(native-lib): release busy-spin test resources in finally and skip without CPU-time support (review #21 #5)

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test(native-lib): comment why ft/feederThread are two variables (review #21 #5 follow-up)

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141fad7
fix(node): poison on the OOM-rollback detach in napi_create_engine too (review #21 #1 completeness)

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test(node): align ca09d69 addon-path test ffi mock with the multi-engine surface

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