The async_hooks module provides an API to register callbacks tracking the lifetime of asynchronous resources created inside a Node.js application. It is currently an experimental API.
Questions tagged [async-hooks]
36 questions
8
votes
4 answers
How to use AsyncLocalStorage for an Observable?
I'd like to use use AsyncLocalStorage in a NestJs Interceptor:
export interface CallHandler {
handle(): Observable;
}
export interface NestInterceptor {
intercept(context: ExecutionContext, next:…
TmTron
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5
votes
1 answer
Does Deno have a Way to Track Async Contexts?
Speaking broadly, in NodeJS a program creates "an async context" whenever code runs that creates a callback-to-be-run-later via the Event Loop or the microtask queue. Network requests, setTimeout callbacks, Promises, etc.
In modern versions of…
Alana Storm
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5
votes
1 answer
node async_hooks destroy lifecycle event is not called for all resources
I've been exploring the async_hooks API for the purposes of tracking state across asynchronous events. I'm finding that the destroy callback isn't always called for each corresponding init callbacks.
Here's a simple repro:
const asyncHooks =…
ColinE
- 68,894
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4
votes
1 answer
snowflake-sdk: Module not found: Error: Can't resolve 'async_hooks' in 'C:\projectname\node_modules\vm2\lib'
I am trying to integrate Snowflake in my Cypress tests but it keeps on throwing error while compiling.
Error:
Error: Webpack Compilation Error
./node_modules/vm2/lib/resolver-compat.js
Module not found: Error: Can't resolve 'async_hooks' in…
sumitsingh13
- 63
- 5
3
votes
0 answers
AsyncLocalStorage loose context in mongoose hooks POST save
How to do to maintain the same context in all flow ?
Why the AsyncHooks context is loose inside the Schema.post('save') but not in Schema.pre('save')?
Please, look the testes-mongoose branch and execute yarn example:mongoose. GIT HUB…
Almerindo Rehem
- 31
- 3
3
votes
0 answers
Performance implications of using Async Hooks
I'm the author of a Node.js library and I want to use Async Hooks to improve DX. But I'm worried about performance.
I've read stories saying that everything is fine, as well as stories where performance was a blocker.
In theory, asynchronicity…
brillout
- 7,804
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3
votes
1 answer
Nodejs AsyncLocalStorage getStore() return undefined
I read this post AsyncLocalStorage for Easy Context Passing in Node.js
I try to get logId in my logs, but i cant, beacause asyncLocalStorage.getStore() return undefined.
It seems that context was lost inside MyLogger class.
How to solve it?
Here is…
Masquitos
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3
votes
0 answers
cls-hooked wrapped into a shared library doesn't work
I'm working on request tracing in my node.js project (monorepo) and found out something called "cls-hooked" which uses async hooks. So I simply wrapped cls-hooked functionalities into adapter that I want to put into a shared library that I use in…
Farys
- 33
- 2
3
votes
2 answers
Why does my use of the async hooks API cause an abnormal termination of Node.js?
I've broken Node.js!!
I'm using the async hooks API and my code is making Node.js terminate abnormally.
My question is: what is it about this code that makes Node.js terminate in this way and is there anything I can change in the code that fixes…
Ashley Davis
- 9,896
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3
votes
1 answer
Error: Cannot find module 'async_hooks' in NodeJs
I am trying to run test code of Async Hooks from official node api documentation and i am getting error Error: Cannot find module 'async_hooks' in console. I already include const async_hooks = require('async_hooks'); at the top of my script. Here…
Jitendra
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3
votes
2 answers
Tracking context with async_hooks
I'm trying to track context through the async stack using node async_hooks. It works for most cases, however I have found this use case that I can't think how to resolve:
service.js:
const asyncHooks = require('async_hooks');
class Service {
…
DomA
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2
votes
0 answers
Nodejs Async_hooks Remove Context When i use await
Hi Everone I am using async_hook for request context
console.log("xxx",hook.getRequestContext()) // undefined because of i am using promise before
var hook = require('../../services/hooks.service');
const test11 = async (req,res)=>{
let…
Muhammad Nabeel
- 21
- 2
2
votes
1 answer
Node.js async_hooks loss tracing
I have read the doc of nodejs async_hooks module and want have a try, this is my demo.mjs:
import async_hooks, { executionAsyncId } from 'async_hooks';
import fs from 'fs';
import path from 'path';
// a async version of console.log
function…
Vista Chyi
- 75
- 7
2
votes
1 answer
What is the difference between async await and async_hooks in Node.js
async_hooks were introduced as experimental in Node v8. Because the name is similar to ES2017 async it could appear that they may be in some way related. Are they? If so, in what way (complementary or competing)?
cmcculloh
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2
votes
1 answer
Are there any npm modules that use async_hooks to retrieve async stack trace?
There is a new API in node 8 called 'async_hook' which I believe should make it possible for a module author to print async stack traces. I'm looking for something similar to chrome dev-tools async stack-trace implementation but for use from…
Ben
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