worker

来源： https://stackoverflow.com/questions/62551007/worker-service-stops-working-unexpectedly

问题 I have been using Spark + Python to finish some works, it's great, but I have a question in my mind: where is the spark job of transformation and action done? Is transformation job done in Spark Master ( or Driver ) while action job is done in Workers ( Executors ), or both of them are done in Workers ( Executors ) Thanks 回答1: Workers (aka slaves) are running Spark instances where executors live to execute tasks. Transformations are performed at the worker, when the action method is called

问题 I have this web app in a flask where I want to execute some ML and AI algorithms after a form is submitted. I am running the ML and AI algorithms in a background job with the help of Redis and rq ( because I have my app hosted by Heroku and they have this timeout thing where you have to return a response within 30 seconds). After the job is done I would like to get the images made by the algorithms ( some graphs ) and output them in a web page, but I have no idea how to render a template in a

问题 I have the following: //main.js if ('serviceWorker' in navigator) { navigator.serviceWorker.register('worker.js').then(function(worker){ // firebase.messaging().useServiceWorker(worker); navigator.serviceWorker.controller.postMessage([MESSAGE HERE]); }); } And in worker.js: self.onmessage=function(e){ console.log(e.data); } But in main.js, I get this error: Uncaught TypeError: Cannot read property 'postMessage' of null Why is this happening? 回答1: This is because you are going into a new

问题 I'm trying to add pwa capabilities to a website running on angular 8. I followed a lot of tutorials, official and unofficial ones and I don't understand what I'm doing wrong. ngsw-config.json is like this : { "$schema": "./node_modules/@angular/service-worker/config/schema.json", "index": "/index.html", "assetGroups": [ { "name": "app", "installMode": "prefetch", "resources": { "files": [ "/favicon.ico", "/index.html", "/manifest.webmanifest", "/*.css", "/*.js", "/*.min.js" ], "urls": [

问题 I'm working on a service that needs to analyze data from social media networks every five minutes for different users. I'm developing it in node.js and I will implement it on Heroku. According to this article on Heroku website, the best way to do that is separating the logic of the scheduler from the logic of the worker. In fact, the idea is to have one dyno dedicated to schedule tasks to avoid duplication. This dyno instructs a farm of workers (n dynos as needed) to do the tasks. Here is the

问题 I am trying to implement Server-Sent Events (SSE) inside a SharedWorker. The implementation is working with no problems in Google Chrome. However, it does not work in FireFox at all. When I try get it to work in FireFox I get this error in the console. error { target: SharedWorker, isTrusted: true, message: "ReferenceError: EventSource is not defined", filename: "https://example.com/add-ons/icws/js/worker.js", lineno: 28, colno: 0, currentTarget: SharedWorker, eventPhase: 2, bubbles: false,

问题 I'm using AngularJS Seed and I want to see a working implementation of a Web Worker. I want to make a simple Web Worker work in order to understand it, but I'm running into an issue with the functionality. I have the Web Worker code in the services.js like so: 'use strict'; /* Services */ var app = angular.module('myApp.services', []). app.factory("HelloWorldService",['$q',function($q){ var worker = new Worker('js/doWork.js'); var defer; worker.addEventListener('message', function(e) {

问题 I want to sort an array, using Web Workers. But this array might receive new values over time, while the worker is still performing the sort function. So my question is, how can I "stop" the sorting computation on the worker after receiving the new item, so it can perform the sort on the array with that item, while still keeping the sorting that was already made? Example: let worker = new Worker('worker.js'); let list = [10,1,5,2,14,3]; worker.postMessage({ list }); setInterval(() => worker

问题 I want to sort an array, using Web Workers. But this array might receive new values over time, while the worker is still performing the sort function. So my question is, how can I "stop" the sorting computation on the worker after receiving the new item, so it can perform the sort on the array with that item, while still keeping the sorting that was already made? Example: let worker = new Worker('worker.js'); let list = [10,1,5,2,14,3]; worker.postMessage({ list }); setInterval(() => worker