Error: write EIO when trying to write to closed terminal

[vkurchatkin]

Test code:

//index.js
var fs = require('fs')

process.on('uncaughtException', function (err) {
  fs.writeFileSync('./uncaughtException.txt', err.stack)
})

setInterval(ping, 1000)

function ping () {
  console.log('ping')
}

Then :

node index.js &
exit

Result (uncaughtException.txt) :

Error: write EIO
    at errnoException (net.js:770:11)
    at Object.afterWrite (net.js:594:19)

Shouldn't this be handled gracefully (e.g. not to crash)?

[vkurchatkin]

Found an approach to work this issue around:

var isatty = require('tty').isatty

var log = console.log

console.log = function () {
  if (!isatty(process.stdout)) return
  log.apply(this, arguments)
}

but it feels wrong to do that

[tjfontaine]

Unfortunately what is happening here is that the controlling process is closing the stdout after you exit. If you want to handle this case, you should listen for process.stdout.on('close') and then either cease to log or change how you're logging at that point.