why-is-node-running
Node is running but you don't know why? why-is-node-running is here to help you.
Installation
Node 8 and above:
npm i why-is-node-running -g
Earlier Node versions (no longer supported):
npm i why-is-node-running@v1.x -g
Usage
const log = require('why-is-node-running') // should be your first require
const net = require('net')
function createServer () {
const server = net.createServer()
setInterval(function () {}, 1000)
server.listen(0)
}
createServer()
createServer()
setTimeout(function () {
log() // logs out active handles that are keeping node running
}, 100)
Save the file as example.js, then execute:
node ./example.js
Here's the output:
There are 5 handle(s) keeping the process running
# Timeout
/home/maf/dev/node_modules/why-is-node-running/example.js:6 - setInterval(function () {}, 1000)
/home/maf/dev/node_modules/why-is-node-running/example.js:10 - createServer()
# TCPSERVERWRAP
/home/maf/dev/node_modules/why-is-node-running/example.js:7 - server.listen(0)
/home/maf/dev/node_modules/why-is-node-running/example.js:10 - createServer()
# Timeout
/home/maf/dev/node_modules/why-is-node-running/example.js:6 - setInterval(function () {}, 1000)
/home/maf/dev/node_modules/why-is-node-running/example.js:11 - createServer()
# TCPSERVERWRAP
/home/maf/dev/node_modules/why-is-node-running/example.js:7 - server.listen(0)
/home/maf/dev/node_modules/why-is-node-running/example.js:11 - createServer()
# Timeout
/home/maf/dev/node_modules/why-is-node-running/example.js:13 - setTimeout(function () {
CLI
You can also run why-is-node-running as a standalone if you don't want to include it inside your code. Sending SIGUSR1 signal to the process will produce the log.
why-is-node-running /path/to/some/file.js
probing module /path/to/some/file.js
kill -SIGUSR1 31115 for logging
To trigger the log:
kill -SIGUSR1 31115
License
MIT