Finding out why an app crashed

I am adding Forever functionality to my web server, PagePark.

Basically where ever you can put web content, you can put a Node app.

We assign a port and route requests to the domain name you’ve declared. It works nicely, and I’m already using it in deployed apps.

My question – how do you get a handle on the error when one of the apps crashes, ie when Forever relaunches it after an error.

I’ll provide the code below that I use that I think should catch the error, but it clearly doesn’t in at least some circumstances.

I got the error to show up by running the app standalone, and then the OS gave me the error and stack crawl, and I was on my way. I want the same info when Forever is managing the app.

Thanks in advance for any help.

var child = new (foreverMonitor.Monitor) (f, options);
forever.startServer (child); 
child.on ("stdout", function (linetext) { 
	addToLogFile (f, linetext);
	});
child.on ("stderr", function (data) { 
	addToLogFile (f, "pagePark on stderr: " + data.toString ());
	});
child.on ("error", function (err) {
	addToLogFile (f, "pagePark on error: " + utils.trimWhitespace (err.toString ()));
	});
child.on ("exit", function () {
	addToLogFile (f, "pagePark on exit: f == " + f + "\n");
	});
child.start ();

[scripting]

I still would like to figure this out. Thanks for respecting that and let’s move on please.

[imsickofmaps]

Have you considered using an Exception handling service like Sentry? You can self-host the backend fairly painlessly so it’s not like you’re introducing a black hole of cost.

See: https://docs.sentry.io/platforms/javascript/