The value of "val" is out of range

[javigualde]

Hello,

We are having a random issue we can't debug in development, but it's throwing exceptions in production.

The error says:

[ERR_OUT_OF_RANGE]: The value of "val" is out of range. It must be a safe integer greater than 0. Received 0

We attach a screenshoot of all the exception stack trace.

Someone having the same issue?

Regards.

[metcoder95]

👋

Hmm, interesting; can you provide an
Minimum Reproducible Example?

[akkerman]

I got this same error when using an example from the book Multithreaded Javascript.

Versions used:

Node: 16, 18, 19 (20 gives a different error)
Piscina: 4.3.0

Here is the code example:

const Piscina = require('piscina')
const assert = require('node:assert')
const { once } = require('node:events')

if (!Piscina.isWorkerThread) {
  const piscina = new Piscina({
    filename: __filename,
    maxQueue: 'auto'
  });

  (async () => {
    for (let i = 0; i< 10_000_000; i++) {
      if (piscina.queueSize == piscina.options.maxQueue) {
        await once(piscina, 'drain')
      }
      piscina.run(i).then(squareRootOfI => {
        assert.ok(typeof squareRootOfI === 'number')
      })
    }
  })();
}

module.exports = num => Math.sqrt(num)

[metcoder95]

I was able to reproduce it after some time, it seems that for faster workloads, the difference in nano is 0 causing the histogram go out of bounds.

I'll prepare a fix for it soon