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Wait for message from parent before closing #693
Description
I am on Node.js version 6-8
I have a child process file with this in it:
process.on('message', function(){
});this process seems to shut down as soon as I start it.
Now if I add a setTimeout to it:
process.on('message', function(){
});
setTimeout(function(){
console.log('timed out');
},3000);then the process will close only after the timeout.
I swear it wasn't like this before. It was working with just process.on('message'). Did something with Node.js change with newer versions?
Anyway how can I wait for a message from the parent process before closing? One would think process.on('message') would keep the process open until the listener was removed -or- process.exit() is called, etc.
Activity
ORESoftware commentedon Jun 22, 2017
LOL I know what's going on...I changed from 'fork' to 'spawn' and an IPC channel is not there by default.
I would recommend to the Node.js authors - please
throw/logan error ifprocess.on('message')is registered for a node.js process that does not have an IPC channel ?GlenTiki commentedon Jun 25, 2017
processis anEventEmitter, so it could be used in weird and funky ways to pass a 'message' event around. It would be unwise to throw when listening for a specific event on an EventEmitter when you don't know how users make use of them.refack commentedon Jun 25, 2017
I smell a deprecation of
messagein favor of anIPCMessagecoming soon... 👃ORESoftware commentedon Jun 26, 2017
@refack thanks for the 🗣 heads up :)