nodemon app崩溃 - 在开始之前等待文件更改

Question

编辑 经过进一步的测试,我发现在这个应用程序和默认安装的mean.js上都会发生这种情况.我在Mac上本地运行它.当我使用"node server.js"运行任一app时,它们不会崩溃.

我正在使用带有grunt-nodemon的MEAN堆栈,并且当访问快速URL时节点崩溃.但它并不总是一致的.有时它可以工作,有时当URL被命中时节点崩溃而没有数据,有时我得到响应并且节点在之后立即崩溃.

浏览器控制台响应

http://localhost:8000/api/users net::ERR_CONNECTION_REFUSED

终端输出:

Mongoose: users.insert({ firstname: 'mike', lastname: 'jones', email:'mike@gmail.com', role: 'admin', password: 'mike', _id: ObjectId("57485c16fc11894b96c28057"), created: new Date("Fri, 27 May 2016 14:39:18 GMT"), __v: 0 })   
user.save success
node crash
[nodemon] app crashed - waiting for file changes before starting...

在这种情况下,POST请求通过,添加了用户,然后节点崩溃,但有时它会在POST成功之前崩溃.节点偶尔也会在GET请求中崩溃.

gruntfile.js:

module.exports = function(grunt) {
    // Load grunt tasks automatically
    require('load-grunt-tasks')(grunt);

    var pkg = grunt.file.readJSON('package.json');

    var options = {
        paths: {
            app: 'app',
            assets: 'app/assets',
            dist: 'app/dist',
            distAssets: 'app/dist/assets',
            html: 'app/html',
            htmlTmp: '.tmp/htmlsnapshot',
            htmlAssets: 'app/html/assets',
            index: 'app/dist/index.html',
            indexDev: 'app/index.html',
            indexTmp: '.tmp/html/index.html'
        },
        pkg: pkg,
        env: {
            test: {
                NODE_ENV: 'test'
            },
            dev: {
                NODE_ENV: 'development'
            },
            prod: {
                NODE_ENV: 'production'
            }
        }
    };

    // Load grunt configurations automatically
    var configs = require('load-grunt-configs')(grunt, options);

    // Define the configuration for all the tasks
    grunt.initConfig(configs);

    // Connect to the MongoDB instance and load the models
    grunt.task.registerTask('mongoose', 'Task that connects to the MongoDB instance and loads the application models.', function () {
        // Get the callback
        var done = this.async();

        // Use mongoose configuration
        var mongoose = require('./config/lib/mongoose.js');

        // Connect to database
        mongoose.connect(function (db) {
            done();
        });
    });

    grunt.registerTask('bumper', ['bump-only']);
    grunt.registerTask('css', ['sass']);
    grunt.registerTask('default', [
        'sass',
        'copy:dev',
        'nodemon',
        'concurrent:dev',
        'watch',
        'mongoose'
    ]);

    grunt.registerTask('shared', [
        'clean:demo',
        'copy:demo',
        'sass',
        'ngconstant',
        'useminPrepare',
        'concat:generated',
        'cssmin:generated',
        'uglify:generated',
        'filerev',
        'usemin',
        'imagemin',
        'usebanner'
    ]);

    grunt.registerTask('demo', [
        'shared',
        'copy:postusemin',
        'grep:demo'
    ]);

    grunt.registerTask('dist', [
        'shared',
        'copy:postusemin',
        'copy:dist',
        'grep:dist',
        'compress',
        'copy:postusemin',
        'grep:demo',
    ]);

    grunt.loadNpmTasks('grunt-forever');

};

default.js

module.exports.tasks = {
    // version update
    bump: {
        options: {
            files: ['package.json', 'bower.json'],
            pushTo: 'origin'
        }
    },

    // application constants
    ngconstant: {
        options: {
            dest: '<%= paths.assets %>/js/app.constants.js',
            name: 'app.constants',
        }
    },

    // remove all bs from css
    cssmin: {
        options: {
            keepSpecialComments: 0
        }
    },
    markdown: {
        all: {
            files: [
                {
                    src: 'README.md',
                    dest: '<%= paths.assets %>/tpl/documentation.html'
                }
            ],
            options: {
                template: '<%= paths.assets %>/tpl/_documentation_template.html',
            }
        }
    }
};

dev.js:

var _ = require('lodash'),
defaultAssets = require('./assets/default'),
testAssets = require('./assets/test'),
testConfig = require('./env/test'),
fs = require('fs'),
path = require('path');

module.exports.tasks = {
    // copy files to correct folders
    copy: {
        dev: {
            files: [
                { expand: true, src: '**', cwd: '<%= paths.app %>/bower_components/font-awesome/fonts',                    dest: '<%= paths.assets %>/fonts' },
                { expand: true, src: '**', cwd: '<%= paths.app %>/bower_components/material-design-iconic-font/fonts',     dest: '<%= paths.assets %>/fonts' },
                { expand: true, src: '**', cwd: '<%= paths.app %>/bower_components/roboto-fontface/fonts',                 dest: '<%= paths.assets %>/fonts' },
                { expand: true, src: '**', cwd: '<%= paths.app %>/bower_components/weather-icons/font',                    dest: '<%= paths.assets %>/fonts' },
                { expand: true, src: '**', cwd: '<%= paths.app %>/bower_components/bootstrap-sass/assets/fonts/bootstrap', dest: '<%= paths.assets %>/fonts' }
            ]
        }
    },

    // watch for changes during development
    watch: {
        js: {
            files: ['Gruntfile.js', '<%= paths.assets %>/js/**/*.js'],
            tasks: ['jshint'],
            options: {
                livereload: true
            }
        },
        css: {
            files: [
                '<%= paths.assets %>/css/**/*.scss'
            ],
            tasks: ['sass'],
            options: {
                livereload: true
            }
        },
        markdown: {
            files: [
                'README.md'
            ],
            tasks: ['markdown']
        },
        tasks:  [ 'express:dev' ],
    },

    // debug while developing
    jshint: {
        all: ['Gruntfile.js', '<%= paths.assets %>/js/**/*.js']
    },
    concurrent: {
        dev: {
            tasks: ['nodemon', 'node-inspector', 'watch'],
            options: {
                logConcurrentOutput: true
            }
        }
    },
    nodemon: {
        dev: {
            script: 'server.js',
            options: {
                nodeArgs: ['--debug'],
                ext: 'js,html',
                callback: function (nodemon) {

                    nodemon.on('crash', function (event) {
                        console.log(event);
                    });


                },
                watch: _.union(defaultAssets.server.gruntConfig, defaultAssets.server.views, defaultAssets.server.allJS, defaultAssets.server.config)
            }
        }
    },
    forever: {
        server1: {
            options: {
                index: 'server.js',
                //logDir: 'logs'
            }
        }
    }
};

角度控制器功能:

  $scope.addUser = function(){

      var user = {
          firstname: $scope.firstname,
          lastname: $scope.lastname,
          email: $scope.email,
          role: $scope.role.selected,
          password: $scope.password
      };

      $http.post('/api/userAdd', user ).then(function successCallback(response) {
          $location.path('/users');
      }, function errorCallback(response) {
          console.log('error addding user');
          console.log(response);
      });
  };

快递路线:

User = require('../models/user.js');

module.exports = function (app) {

    app.get('/api/users', function (req, res) {

        User.find({}, function (err, users) {
            if ( err ) {
                res.send({
                    message : 'error finding users',
                    success: false
                });
            } else {
                res.json(users);
            }
        });

    });

    app.get('/api/users', function (req, res) {
        User.find({fields: {}}, function (err, docs) {
            res.json(docs);
        });
    });

    app.post('/api/userAdd', function (req, res) {

        var user = new User(req.body);

        user.save( function( err, user ){

            if (err){
                console.log('user.save error');
                console.log(err);
                res.send({
                    success: false
                });
            } else {
                console.log('user.save success');
                res.send({
                    success: true
                });
            }
        });

    });

};

我还使用Chromes Advanced REST扩展进行测试,并且使用此工具节点的任何请求都会立即崩溃.

我是MEAN的新手所以我错过了导致崩溃的事情吗？有任何想法吗？

Answer 1

这是因为所有在后台运行的服务器进程。所以你需要做的就是从终端阻止它们。

快招

对于 LINUX

通过在终端上运行这个来杀死他们：

pkill -f node

然后重启nodemon。

FOR 窗口

 1. Go to the task manager
 2. Then search-for node.js server-side javascript
 3. Then right click on it and end-task from the processes. 

然后重启服务器。它会正常工作。

Answer 2

对于 Windows 用户，转到任务管理器，然后找到 node.js 服务器端 javascript，并在该过程中结束任务。然后用你的命令再试一次。

Answer 3

在终端中使用以下命令终止现有正在运行的端口并重新启动服务。

killall -9 node

或者杀死特定端口而不是所有端口

sudo lsof -i :3000 //replace 3000 with your port number
sudo kill -9 31363 // replace 31363 with your PID

Answer 4

有时，当您忘记获取 .env 文件的来源时，就会发生这种情况

Answer 5

问题： 应用程序崩溃 - 在开始之前等待文件更改...

可能有不同的原因：

1. 后台运行节点

pkill -f node

在 Mac OS 中工作，在 Microsoft 中没有工作。

2. Server.js 和 package.json 不在同一个文件夹中。核实 。

检查 package.json

"scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
     "start": "nodemon Server.js"
 }

Answer 6

我将节点从 v4.2.6 更新到 v4.4.5 修复了默认mean.js 安装的问题。我将从那里开始构建。