Memory leak caused by gulp & nodemon
I have this simple gulpfile which basically compiles a few fewer files and starts the download. I also have nodemon to restart the server when the code changes.
var gulp = require('gulp'),
less = require('gulp-less'),
autoprefixer = require('gulp-autoprefixer'),
minifycss = require('gulp-minify-css'),
jshint = require('gulp-jshint'),
uglify = require('gulp-uglify'),
// imagemin = require('gulp-imagemin'),
rename = require('gulp-rename'),
concat = require('gulp-concat'),
notify = require('gulp-notify'),
cache = require('gulp-cache'),
livereload = require('gulp-livereload'),
nodemon = require('gulp-nodemon')
// del = require('del'),
path = require('path');
gulp.task('styles', function() {
return gulp.src('public/css/less/app.less')
.pipe(less())
.pipe(autoprefixer('last 2 version', 'safari 5', 'ie 8', 'ie 9', 'opera 12.1', 'ios 6', 'android 4'))
.pipe(gulp.dest('public/css/'))
.pipe(rename({suffix: '.min'}))
.pipe(minifycss())
.pipe(gulp.dest('public/css/'))
.pipe(notify({ message: 'Styles task complete' }))
.pipe(livereload());
});
// Watch
gulp.task('watch', function() {
livereload.listen();
gulp.watch('public/css/less/*.less', ['styles']);
gulp.watch(['public/app/**']).on('change', livereload.changed);
});
gulp.task('demon', function () {
nodemon({
ignore: [
'./public/',
'./node_modules/',
'./tests/'
]
})
.on('start', ['watch'])
.on('change', ['watch'])
.on('restart', function () {
console.log('restarted!');
});
});
// Default Task
gulp.task('default', ['demon']);
The problem is everything works 5 times, then I get a warning:
(node) warning: possible EventEmitter memory leak detected. 11 listeners added. Use emitter.setMaxListeners() to increase limit.
Trace
at StatWatcher.addListener (events.js:160:15)
at Object.fs.watchFile (fs.js:1175:8)
at Gaze._pollFile (/Users/kris/Sites/SmartSaver/node_modules/gulp/node_modules/vinyl-fs/node_modules/glob-watcher/node_modules/gaze/lib/gaze.js:329:10)
at /Users/kris/Sites/SmartSaver/node_modules/gulp/node_modules/vinyl-fs/node_modules/glob-watcher/node_modules/gaze/lib/gaze.js:411:12
at Array.forEach (native)
at /Users/kris/Sites/SmartSaver/node_modules/gulp/node_modules/vinyl-fs/node_modules/glob-watcher/node_modules/gaze/lib/gaze.js:409:11
at iterate (/Users/kris/Sites/SmartSaver/node_modules/gulp/node_modules/vinyl-fs/node_modules/glob-watcher/node_modules/gaze/lib/helper.js:52:5)
at Object.forEachSeries (/Users/kris/Sites/SmartSaver/node_modules/gulp/node_modules/vinyl-fs/node_modules/glob-watcher/node_modules/gaze/lib/helper.js:66:3)
at Gaze._initWatched (/Users/kris/Sites/SmartSaver/node_modules/gulp/node_modules/vinyl-fs/node_modules/glob-watcher/node_modules/gaze/lib/gaze.js:354:10)
at Gaze.add (/Users/kris/Sites/SmartSaver/node_modules/gulp/node_modules/vinyl-fs/node_modules/glob-watcher/node_modules/gaze/lib/gaze.js:177:8)
at new Gaze (/Users/kris/Sites/SmartSaver/node_modules/gulp/node_modules/vinyl-fs/node_modules/glob-watcher/node_modules/gaze/lib/gaze.js:74:10)
at gaze (/Users/kris/Sites/SmartSaver/node_modules/gulp/node_modules/vinyl-fs/node_modules/glob-watcher/node_modules/gaze/lib/gaze.js:86:10)
at Object.module.exports [as watch] (/Users/kris/Sites/SmartSaver/node_modules/gulp/node_modules/vinyl-fs/node_modules/glob-watcher/index.js:12:17)
at Gulp.watch (/Users/kris/Sites/SmartSaver/node_modules/gulp/index.js:35:16)
at Gulp.gulp.task.nodemon.ignore (/Users/kris/Sites/SmartSaver/gulpfile.js:36:8)
at module.exports (/Users/kris/Sites/SmartSaver/node_modules/gulp/node_modules/orchestrator/lib/runTask.js:34:7)
And after the words crash:
[gulp] [nodemon] starting `node ./bin/www`
[12:24:43] Starting 'watch'...
[12:24:43] 'watch' errored after 9.52 ms
[12:24:43] Error: EMFILE: Too many opened files.
at Gaze._handleError (/Users/kris/Sites/SmartSaver/node_modules/gulp/node_modules/vinyl-fs/node_modules/glob-watcher/node_modules/gaze/lib/gaze.js:436:31)
at Gaze._watchDir (/Users/kris/Sites/SmartSaver/node_modules/gulp/node_modules/vinyl-fs/node_modules/glob-watcher/node_modules/gaze/lib/gaze.js:302:17)
at /Users/kris/Sites/SmartSaver/node_modules/gulp/node_modules/vinyl-fs/node_modules/glob-watcher/node_modules/gaze/lib/gaze.js:358:10
at iterate (/Users/kris/Sites/SmartSaver/node_modules/gulp/node_modules/vinyl-fs/node_modules/glob-watcher/node_modules/gaze/lib/helper.js:52:5)
at /Users/kris/Sites/SmartSaver/node_modules/gulp/node_modules/vinyl-fs/node_modules/glob-watcher/node_modules/gaze/lib/helper.js:61:11
at /Users/kris/Sites/SmartSaver/node_modules/gulp/node_modules/vinyl-fs/node_modules/glob-watcher/node_modules/gaze/lib/gaze.js:420:5
at iterate (/Users/kris/Sites/SmartSaver/node_modules/gulp/node_modules/vinyl-fs/node_modules/glob-watcher/node_modules/gaze/lib/helper.js:52:5)
at /Users/kris/Sites/SmartSaver/node_modules/gulp/node_modules/vinyl-fs/node_modules/glob-watcher/node_modules/gaze/lib/helper.js:61:11
at /Users/kris/Sites/SmartSaver/node_modules/gulp/node_modules/vinyl-fs/node_modules/glob-watcher/node_modules/gaze/lib/gaze.js:420:5
at iterate (/Users/kris/Sites/SmartSaver/node_modules/gulp/node_modules/vinyl-fs/node_modules/glob-watcher/node_modules/gaze/lib/helper.js:52:5)
at /Users/kris/Sites/SmartSaver/node_modules/gulp/node_modules/vinyl-fs/node_modules/glob-watcher/node_modules/gaze/lib/helper.js:61:11
at /Users/kris/Sites/SmartSaver/node_modules/gulp/node_modules/vinyl-fs/node_modules/glob-watcher/node_modules/gaze/lib/gaze.js:420:5
at iterate (/Users/kris/Sites/SmartSaver/node_modules/gulp/node_modules/vinyl-fs/node_modules/glob-watcher/node_modules/gaze/lib/helper.js:52:5)
at /Users/kris/Sites/SmartSaver/node_modules/gulp/node_modules/vinyl-fs/node_modules/glob-watcher/node_modules/gaze/lib/helper.js:61:11
at /Users/kris/Sites/SmartSaver/node_modules/gulp/node_modules/vinyl-fs/node_modules/glob-watcher/node_modules/gaze/lib/gaze.js:420:5
at iterate (/Users/kris/Sites/SmartSaver/node_modules/gulp/node_modules/vinyl-fs/node_modules/glob-watcher/node_modules/gaze/lib/helper.js:52:5)
I was looking for a warning and it seemed to be a bug in Node, but I believe I am doing something wrong here, for example maybe initializing too many listeners or not closing them properly.
Any feedback is greatly appreciated.
Thank!
+3
source to share
1 answer
It looks like the problem is this
.on('start', ['watch'])
.on('change', ['watch'])
.on('restart', function () {
console.log('restarted!');
});
Each time the file changes, you run watch
that attaches additional listeners. After a few restarts, you will exceed the maximum number of listeners.
This is the default nodemon installation, and all you really need is:
gulp.task('dev', function () {
nodemon({
script: 'your-start-script.js',
ext: 'js'
});
});
+3
source to share