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requiring C++ addon modules occurs 'Error: Module did not self-register.' with Worker Threads #21481

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requiring C++ addon modules occurs 'Error: Module did not self-register.' with Worker Threads#21481
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addonsIssues and PRs related to native addons.workerIssues and PRs related to the worker_threads module and Worker API.

Description

@ledsun
ledsun
opened on Jun 23, 2018
  • Version: v10.5.0
  • Platform: Darwin nakajimashigeru-no-MacBook-Pro.local 16.7.0 Darwin Kernel Version 16.7.0: Fri Apr 27 17:59:46 PDT 2018; root:xnu-3789.73.13~1/RELEASE_X86_64 x86_64
  • Subsystem: worker

When C++ addon was loaded twice with worker threads, error below occurs:

events.js:167
      throw er; // Unhandled 'error' event
      ^
Error: Module did not self-register.
    at Object.Module._extensions..node (internal/modules/cjs/loader.js:731:18)
    at Module.load (internal/modules/cjs/loader.js:612:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:551:12)
    at Function.Module._load (internal/modules/cjs/loader.js:543:3)
    at Module.require (internal/modules/cjs/loader.js:650:17)
    at require (internal/modules/cjs/helpers.js:20:18)
    at bindings (/Users/shigerunakajima/worker_thread_test/node_modules/bindings/bindings.js:81:44)
    at Object.<anonymous> (/Users/shigerunakajima/worker_thread_test/node_modules/libxmljs/lib/bindings.js:1:99)
    at Module._compile (internal/modules/cjs/loader.js:702:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:713:10)
Emitted 'error' event at:
    at Worker.[kOnErrorMessage] (internal/worker.js:281:10)
    at Worker.[kOnMessage] (internal/worker.js:291:37)
    at MessagePort.Worker.(anonymous function).on (internal/worker.js:228:57)
    at MessagePort.emit (events.js:182:13)
    at MessagePort.onmessage (internal/worker.js:57:8)

To reproduce, run code below with --experimental-worker flag:

const libxmljs = require('libxmljs')
const {
  Worker
} = require('worker_threads')

new Worker(__filename)

When I try to require the sharp, same error occurs.

Activity

  1. TimothyGu
    added
    workerIssues and PRs related to the worker_threads module and Worker API.
    on Jun 23, 2018
  2. addaleax
    added
    addonsIssues and PRs related to native addons.
    on Jun 25, 2018

  3. hlolli commented on Aug 29, 2018

    @hlolli
    hlolli
    on Aug 29, 2018

    I get the same with node-speaker, I'm on Linux nixos 4.14.63 #1-NixOS SMP Wed Aug 15 16:13:02 UTC 2018 x86_64 GNU/Linux with nodejs 10.7.0. The package node-speaker doesn't work with experimental workers, but works fine otherwise. Like @ledsun I'm also self referencing with __file when constructing a new worker.

  4. mattolson commented on Oct 10, 2018

    @mattolson
    mattolson
    on Oct 10, 2018

    I'm running into this as well when using experimental workers that try to load the lzo package.

  5. mattolson commented on Oct 24, 2018

    @mattolson
    mattolson
    on Oct 24, 2018

    This looks to be a duplicate of #21783. It appears that the issue is due to addon initialization -- any native addons that are loaded in both the parent and worker thread (i.e. loaded more than once in the same process) need to be context aware.

    I was facing this issue with the node-lzo library and we fixed it in schroffl/node-lzo#11

  6. addaleax
    closed this as completedin 8ebd339on Feb 22, 2019
  7. addaleax
    added a commit that references this issue on Feb 25, 2019

    worker: improve integration with native addons

    07b2ee2
  8. rvagg
    added a commit that references this issue on Feb 28, 2019

    worker: improve integration with native addons

    a9a2c58

  9. bdotsamir commented on Feb 6, 2020

    @bdotsamir
    bdotsamir
    on Feb 6, 2020

    Issue occurs here too, Linux host-name 5.3.0-28-generic #30~18.04.1-Ubuntu SMP Fri Jan 17 06:14:09 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
    Package: brain.js
    Node.js v10.18.1

  10. djannot
    added a commit that references this issue on Jan 20, 2026

    Fix ONNX Runtime worker restart issue

    8e96b39
  11. sjarmak
    added a commit that references this issue on Jul 27, 2026

    worker: improve integration with native addons

    8ebd339
  12. Chirag8405
    added 2 commits that reference this issue on Sep 9, 2026

    fix(ledger-signer): stop loading node-hid unconditionally, fixing int…

    281f21b

    fix(ledger-signer): serialize the hid transport through one persisten…

    3573141
  13. jaykerkar0405
    added 2 commits that reference this issue on Sep 26, 2026

    fix(ledger-signer): stop loading node-hid unconditionally, fixing int…

    3d0227e

    fix(ledger-signer): serialize the hid transport through one persisten…

    5909f73
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