exec has memory limitation of buffer size of 512k. In this case it is better to use spawn. With spawn one has access to stdout of executed command at run time
var spawn = require('child_process').spawn;
var prc = spawn('java', ['-jar', '-Xmx512M', '-Dfile.encoding=utf8', 'script/importlistings.jar']);
//noinspection JSUnresolvedFunction
prc.stdout.setEncoding('utf8');
prc.stdout.on('data', function (data) {
var str = data.toString()
var lines = str.split(/(\r?\n)/g);
console.log(lines.join(""));
});
prc.on('close', function (code) {
console.log('process exit code ' + code);
});
var exec = require('child_process').exec;
exec('pwd', function callback(error, stdout, stderr){
// result
});
From the Node.js documentation:
Node provides a tri-directional popen(3) facility through the ChildProcess class.
The simplest way is:
const { exec } = require("child_process")
exec('yourApp').unref()
unref is necessary to end your process without waiting for "yourApp"
Here are the exec docs
Source: Stackoverflow.com