请问项目运行时总是出现/sockjs-node/info?t=1473313213585". [WDS] Disconnected!的错误是怎么回事？

webpack.common.js如下

/**
 * Created by lxy on 2016/8/24.
 */
var webpack = require('webpack');
var HtmlWebpackPlugin = require('html-webpack-plugin');
var ExtractTextPlugin = require('extract-text-webpack-plugin');
var helpers = require('./helpers');

module.exports = {
    entry: {
        'polyfills': './src/polyfills.ts',
        'vendor': './src/vendor.ts',
        'app': './src/main.ts',
        'client': "webpack-dev-server/client?http://localhost:8080"
    },

    resolve: {
        extensions: ['', '.js', '.ts','.html'],
        modulesDirectories: [
            'node_modules'
        ]
    },

    module: {
        loaders: [
            {
                test: /\.ts$/,
                loaders: ['ts', 'angular2-template-loader']
            },
            {
                test: /\.html$/,
                loader: 'html'
            },

            {
                test: /\.(png|jpe?g|gif|svg|woff|woff2|ttf|eot|ico)$/,
                loader: 'file?name=assets/[name].[hash].[ext]'
            },
            {
                test: /\.css$/,
                exclude: helpers.root('src', 'app'),
                loader: ExtractTextPlugin.extract('style', 'css?sourceMap')
            },
            {
                test: /\.css$/,
                include: helpers.root('src', 'app'),
                loader: 'raw'
            }
        ]
    },

    plugins: [
        new webpack.optimize.CommonsChunkPlugin({
            name: ['app', 'vendor', 'polyfills']
        }),

        new HtmlWebpackPlugin({
            template: 'src/index.html'
        })
    ]
};

package.json scripts start 部分：

"start": "webpack-dev-server --inline --progress --port 8080 --host 0.0.0.0",