Result shows 0 data

[jorgevrgs]

I've implemented a simple hello world server using Fastify v4.22.2 and tried several times to run autocannon getting data 0:

❯ autocannon --version
autocannon v7.12.0
node v18.17.1

Running:

autocannon -c 100 -d 5 -p 10 <URL>

Results:

However using oha and ab I got data:

oha -n 100 -c10 -z 5s <URL>

Results:

Is there any other useful information I can provide?

[JaoodxD]

Just faced similar issue.
I started test server on wsl2 and run autocannon against it.
As a result of debugging I find out that my wsl had IPv6 url.
If you run autocannon with --debug key you'll find connection refused errors.
Somehow node version affects server oportunity to fallback localhost to IPv6 [::1].
Using newer version of node (20.6.1 in my case) just fixed it.

[ubikapps]

I had this using localhost. I just changed to 127.0.0.1 and it fixed it

[casantosmu]

Can you try upgrading to the latest Node.js version (20) to see if the issue is resolved?

[b2whats]

not resolved

//server.js
import Fastify from 'fastify'
import staticServe from '@fastify/static'

const fastify = Fastify({
  logger: true,
  http2: true,
  https: {
    key: fs.readFileSync('localhost.key'),
    cert: fs.readFileSync('localhost.crt'),
  },
})

fastify.get('/', async function handler(request, reply) {
  reply.send({ a: 1 })
})

fastify.listen({ port: 3000, host: '127.0.0.1' }, (err, address) => {
  if (err) {
    fastify.log.error(err)
    process.exit(1)
  } else {
    console.log(`server listening on ${address}`)
  }
})

// autocannon.js
import autocannon from 'autocannon'

const instance = autocannon({
  url: 'https://localhost:3000',
  connections: 5,
  pipelining: 1,
  duration: 5,
  debug: true,
}, (err, result) => {
    console.log(err)
    console.log(result)
});