Quick‑Start Guide to Arthas: Debugging Java Applications in Minutes

Arthas is an open‑source Java diagnostic tool from Alibaba that helps developers monitor and troubleshoot running Java processes. This article provides a quick‑start tutorial covering installation, launching, and basic commands.

Official documentation:

https://alibaba.github.io/arthas/

Quick‑Start Steps

Start a demo Java application.

Launch Arthas and attach to the demo process.

Open the Arthas dashboard to view runtime information.

Use the thread command to list threads of the target process.

Apply the watch command to monitor method calls or field values.

Exit Arthas when debugging is complete.

Demo Code Used for the Tutorial

package com.fun;

import com.fun.frame.httpclient.FanLibrary;
import com.fun.utils.RString;

class sd extends FanLibrary {

    public static void main(String[] args) {
        while (true) {
            sleep(1000);
            RString.getStringWithoutNum(10);
            sleep(1000);
            String url = "https://api.apiopen.top/getAllUrl";
            def get = getHttpGet(url);
            def response = getHttpResponse(get);
        }
        testOver();
    }

}

The author notes that the demo code is original and requests that third parties do not repost without permission.