Issue with DWR and Android web browser

I recently encountered an issue while trying to access an application through the Android browser. The application uses DWR to maintain connections with connected clients.

Everything seems to be working fine, except for the fact that if there is a 2-minute gap without any data being sent to the client on an Android phone, the connection is lost and no further data is received. This issue does not occur when using Firefox, Opera, or Chrome. If the time between data transfers is less than 2 minutes, everything functions as expected.

My question now is: Is there a timeout setting in the Android browser that I am overlooking? Or is this issue caused by a built-in bug or feature that cannot be bypassed?

I understand that I could potentially solve this problem by implementing a heartbeat mechanism, but I am curious to know why it is happening in the first place.

Thank you in advance, Max

By the way, all the server and clients are running on my machine, and I am testing this on the Android emulator with Windows XP.

Android emulator version 1.10 (build_id CUPCAKE-150240)
javascriptandroidajaxdwr

Answer №1

Is it possible that the Android system is performing garbage collection on your activity, causing your web browser to disappear and the persistent connection to close?

You could verify this by checking the logcat (on the Android device) or the logs on the webserver (on the remote end).

If this is indeed the issue, you may need to implement code to reconnect in the onresume/onstart method in Android.

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

Is the original object cloned or passed by reference when passing it to a child React component through props?

When passing an object to a child component through the components props in React, does the object get cloned or does it simply pass a reference to the original object? For instance, in my App.js, I am importing a JSON object called ENTRY_DATA. Then, I pa ...

javascriptreactjs

What could be causing the Angular HTTPClient to make duplicate REST calls in this scenario?

I am encountering an issue with my Angular service that consumes a Rest API. Upon inspecting the network and the backend, I noticed that the API is being called twice every time: Here is a snippet of my Service code: getAllUsers():Observable<any>{ ...

javascriptangularrxjshttpclient

Executing a prop function within the useEffect hook: a step-by-step guide

I am attempting to address this warning in a react component Line 19:8: React Hook useEffect has a missing dependency: 'handleChange'. Either include it or remove the dependency array react-hooks/exhaustive-deps This is the component: ...

javascriptreactjsuse-effect

Trigger Object RuntimeError

Initially, I attempted to pass the object :id to the URL and it was successful. However, when I tried to pass the object to the list, I encountered a ReferenceError. index.ejs: <tr> <th class="text-center">AWB NO</th> <th c ...

javascriptnode.jsexpressejs

Schedule Master: A sophisticated tool for time management

I have been following the instructions to implement a date time picker from this tutorial. I downloaded the necessary js and css files and placed them in the respective directories. However, when I click on the calendar icon, the calendar does not pop up. ...

javascripthtmlcsstwitter-bootstrap

The JQuery mobile navigation menu effortlessly appears on your screen

I am experiencing an issue with a JQuery mobile navigation that is designed for screens @979 pixels wide. The problem arises when the screen is resized to 979px - the menu pops up fully extended and covers the content of the web page. I suspect that this ...

javascriptjqueryhtmlmobilejquery-mobile-navbar

Innovative solution for detecting and replacing undefined object properties in Angular 2 with TypeScript

After encountering the issue of core.umd.js:3523 ORIGINAL EXCEPTION: Cannot read property 'fullName' of undefined I realized that the Exception stemmed from a Template trying to access a specific property: {{project.collaborators["0"]["fullN ...

javascriptangulartypescriptundefined

The useRouter hook from next/router was unable to connect because NextRouter was not activated

import { useRouter } from 'next/router'; const Navbar2 = () => { const router = useRouter(); return ( <nav className={`fixed top-0 w-full px-10 bg-white p-4 transition-all duration-500 ${isVisible ? 'top-0' : 'top-[-1 ...

javascriptnext.js

Obtain template from AngularJS and transmit data to template

<section ng-app="app" ng-controller="ctrl"> <div id="output">{{ foo }}</div> <button ng-click="myFun()">Click me</button> </section> var app = angular.module("app", []); app.controller('ctrl', funct ...

javascriptangularjs

What is the process for removing an item from an array that is stored in the backend server?

Apologies for my lack of experience in coding, but I encountered an issue where clicking on the item redirected me to a page and resulted in an error instead of deleting it. I attempted to delete the item using the product ID, but it was not successful. Ev ...

javascriptreactjssql-serverexpress

Tips for preventing hcaptcha from displaying image challenges during web scraping with puppeteer

When I attempt to scrape a website, the process of passing the captcha can be unpredictable. Sometimes, after clicking on the captcha checkmark, I am presented with images to solve the captcha. Other times, it simply passes me through without any further a ...

javascriptnode.jspuppeteer

Error: Cannot access collection property of dbObject

I've been working on fetching data from a database, but I've hit a roadblock. I keep encountering an error and can't seem to figure out what's causing it. I've searched for solutions but haven't found one that works yet. I&apo ...

javascriptnode.jsexpress

What is the best way to implement the 'setInterval' function in this code to effortlessly fetch forms or data on my webpage without any need for manual refresh?

I am using ajax and javascript to fetch a modal on another page or in a separate browser. While I am able to retrieve the modal, I require the page to refresh before displaying the modal. I have come across suggestions to use the setInterval function but I ...

javascriptphphtmlajax

Guard your website against Backdoor/PHP.C99Shell, also known as Trojan.Script.224490

Recently, my website fell victim to a trojan script infiltration. Someone maliciously inserted a file named "x76x09.php" or "config.php" into the root directory of my webspace. This file, with a size of 44287 bytes and an MD5 checksum of 8dd76fc074b717fcc ...

phpjavascriptsecurityvirustrojan

Unable to populate dropdown list using jquery, ajax, and json

I am so close to figuring it out, but I am struggling with iterating through JSON objects to populate a dropdown list. Here is the JavaScript code I have written: The JSON data I am working with looks like this: <pre>{"name":"County1","name":"County ...

jqueryajaxjsondrop-down-menu

Modifying a CSS property with jQuery

If I have the following HTML, how can I dynamically adjust the width of all "thinger" divs? ... <div class="thinger">...</div> <div class="thinger">...</div> <div class="thinger">...</div> ... One way to do this is usi ...

javascriptjquerycss

The NativeScript ListView fails to refresh its content

My ListView setup looks like this <ListView height="150" [items]="countries"> <ng-template let-country="item"> <Image src={{country.imgSrc}}></Image> <Label text={{country.name}}& ...

androidlistviewnativescriptangular2-nativescript

Exploring JQuery techniques for iterating through numerous JSON files to create dynamic quizzes

Hi everyone, I could really use some assistance right now. I am working on developing a front-end system for a quiz, but I have encountered a challenge with the back-end. The back-end provides 3 JSON files to work with. JSON1 contains category and title in ...

javascriptjqueryjson

Encountering a NoSuchMethodError issue when implementing Proguard with an OnClickListener

Encountering an issue when using proguard to build my android application - as soon as the first activity is displayed to the user, the application crashes with the following error: java.lang.NoSuchMethodError: android.content.res.XmlResourceParser.i ...

androidobfuscationproguard

Creating a code script for the purpose of automating npm commands

Currently, I am immersed in an angular js project and I have a desire to streamline the execution of the following two commands. ./node_modules/protractor/bin/webdriver-manager update ./node_modules/protractor/bin/webdriver-manager start The challenge li ...

javascriptangularjsautomation