[Bug]: Jest worker encountered 3 child process exceptions, exceeding retry limit

[shaobeichen]

Version

28.1.2

Steps to reproduce

https://github.com/shaobeichen/blog

yarn
yarn test:coverage

Expected behavior

no error

Actual behavior

$ yarn test:coverage
yarn run v1.22.19
$ jest --coverage --maxWorkers 2 --unhandled-rejections=warn
PASS src/components/abstract/toast/tests/toast.test.ts
√ 创建一个弹窗，持续3秒 (13 ms)
√ 命令式调用，创建一个弹窗 (12 ms)

Running coverage on untested files...Failed to collect coverage from D:\work\blog\src\utils\request\base.ts
ERROR: Jest worker encountered 3 child process exceptions, exceeding retry limit
STACK: Error: Jest worker encountered 3 child process exceptions, exceeding retry limit
at ChildProcessWorker.initialize (D:\work\blog\node_modules\jest-worker\build\workers\ChildProcessWorker.js:170:21)
at ChildProcessWorker._onExit (D:\work\blog\node_modules\jest-worker\build\workers\ChildProcessWorker.js:254:12)
at ChildProcess.emit (node:events:520:28)
at Process.ChildProcess._handle.onexit (node:internal/child_process:291:12)
Failed to collect coverage from D:\work\blog\src\utils\request\mofish.ts
ERROR: Jest worker encountered 3 child process exceptions, exceeding retry limit
STACK: Error: Jest worker encountered 3 child process exceptions, exceeding retry limit
at ChildProcessWorker.initialize (D:\work\blog\node_modules\jest-worker\build\workers\ChildProcessWorker.js:170:21)
at ChildProcessWorker._onExit (D:\work\blog\node_modules\jest-worker\build\workers\ChildProcessWorker.js:254:12)
at ChildProcess.emit (node:events:520:28)
at Process.ChildProcess._handle.onexit (node:internal/child_process:291:12)
-------------------------------|---------|----------|---------|---------|-------------------
File | % Stmts | % Branch | % Funcs | % Lines | Uncovered Line #s
-------------------------------|---------|----------|---------|---------|-------------------
All files | 20.86 | 30 | 15.38 | 20.83 |
src | 0 | 100 | 100 | 0 |
main.ts | 0 | 100 | 100 | 0 | 1-13
src/api | 0 | 100 | 0 | 0 |
toast.d.ts | 0 | 0 | 0 | 0 |
src/utils | 100 | 100 | 100 | 100 |
sleep.ts | 100 | 100 | 100 | 100 |
src/utils/request | 0 | 100 | 100 | 0 |
index.ts | 0 | 100 | 100 | 0 | 1-6
-------------------------------|---------|----------|---------|---------|-------------------
Test Suites: 1 passed, 1 total
Tests: 2 passed, 2 total
Snapshots: 0 total
Time: 8.779 s
Ran all test suites.
Done in 9.76s.

Additional context

"test:coverage": "jest --coverage --maxWorkers 2"

not work

Environment

System:
    OS: Windows 10 10.0.22000
    CPU: (8) x64 11th Gen Intel(R) Core(TM) i5-11320H @ 3.20GHz
  Binaries:
    Node: 16.14.0 - C:\Program Files\nodejs\node.EXE
    Yarn: 1.22.19 - ~\AppData\Roaming\npm\yarn.CMD
    npm: 8.3.1 - C:\Program Files\nodejs\npm.CMD
  npmPackages:
    jest: ^28.1.2 => 28.1.2

[troncoso]

I am having the exact same issue (obviously with a different file though). The differences in my environment are:

OS - MacOS Monteray v12.4
Node - v18.2.0
NPM - v8.9.0
jest - 28.1.3

[wkul9429]

Hi I'm also facing the same issue, what is the reason for this
Node v16.15.1
NPM 8.11.0
jest 28.1.3

[mrsolarius]

I can also reproduce it with this environment:
Windows 10
Intel(R) Core(TM) i7-8650U CPU @ 1.90GHZ
Node v16.15.0
NPM : 8.5.5
jest 28.1.3

[KyDenZ]

With Jest 27 I didn't have the problem, when I switched to Jest 28 I had the same error.

I had problems importing in the files where I had this error.

I don't know why it was not a problem with the build and with version 27.

Now it works

[shaobeichen]

With Jest 27 I didn't have the problem, when I switched to Jest 28 I had the same error.

I had problems importing in the files where I had this error.

I don't know why it was not a problem with the build and with version 27.

Now it works

oh thanks, i'll try it tonight

[wkul9429]

My issue was with mocks, after fixing them issue got resolved

[github-actions]

As noted in the Bug Report template, all bug reports requires a minimal reproduction. Please open up a new issue providing one. Read more at https://stackoverflow.com/help/minimal-reproducible-example.

[havenchyk]

My issue was with mocks, after fixing them issue got resolved

@wkul9429 how exactly did you fix it?

[dr-azbest]

I had exact same error message on CI tests. It affected all my test cases. This message hides real problem. You have to change maxWorkers to 1 to see what is the problem on single thread. Then you will see cause of error which helps you to resolve issue.

[ddbhagat]

It appears that Node 15 introduced a breaking change to promise rejection handling. Reference https://developer.ibm.com/blogs/nodejs-15-release-blog/

[havenchyk]

yes, it's the problem. And it turned out debugging of unhandled rejected promises is so painful

[github-actions]

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