puppeteer-cluster | Puppeteer Pool , run a cluster of instances in parallel | Automation library

I need to get every client in a table so that I can iterate through them, and use Puppeteer to crawl some data. I need the MySQL query because I gotta pass some params through the querystring.

I'm using Puppeteer, Puppeteer-cluster (due to the hundreds of rows), and MySQL driver.

I am trying to use args in my code to use a proxy service I have. If I remove the args altogether things run fine but if I have them in there I get an error stating: Error: Unable to restart chrome. I checked multiple examples and copied the same to my code but it seems to fail. Any ideas on how to implement this correctly?

Code:

Long story short, I've made an app for web scraping and in order for it to be able to simultaneously run more then 1 process at a time (more than 1 Chromium opened), i used puppeteer-cluster. I've got it to run several processes at once, but the cluster won't stop afterwards, it permanently runs. Along the way, I've encountered the following error (1)

I'm trying to load a page with a canvas and then save it as an image.

For example, this page. On Chrome, I can right click the canvas with a circle on the upper right side of the page and click save image. I want to do this exact same thing but through NodeJS and Puppeteer. Is this possible?

So far I'm trying to select it via

I use puppeteer-cluster + node js. I am new in that. I have some trouble. I need to get XHR response from site.I am listening to the page, but I cannot write the resulting value to the variable. I need to use the value in another part of the code. how to wait for the function to execute in a listener and write the result to a variable?

So I have seen the puppeteer-cluster package but that has very manual examples my situation is very dynamic so i'll try my best to explain.

Ok So I have an app in which users schedule posts. Once the time of posting arrives puppeteer runs, goes to the site, logs in the user using creds from my app's db, and posts the content fairly simple.

Now the problem arises when says 20 users all decided to post today at 1pm. Now puppeteer spawns 25 chromium instances which messess with the server cause of limited RAM. What I am asking basically is how can achieve the following: 1). Limit puppeteer's concurrency to 10 instances. Any more then that then it should basically do it in batches like do 10 first then close them and start 10 again etc. 2). If less then 10 then just keep normal functionality.

I know this seems like I m giving you homework but trust me i just need some guidance a little help or pointing me in the right direction would suffice. or if you could tell me how to use this: puppeteer-cluster dynamically to suit my needs. Many thanks!

I wanted to know if anyone using Puppeteer-Cluster could elaborate on how the Cluster.Launch({settings}) protects against sharing of cookies and web data between pages in different context.

Do the browser contexts here, actually block cookies and user-data is not shared or tracked? Browserless' now infamous page seems to think no, here and that .launch({}) should be called on the task, not ahead of the queue.

So my question is, how do we know if puppeteer-cluster is sharing cookies / data between queued tasks? And what kind of options are in the library to lower the chances of being labeled a bot?

Setup: I am using page.authenticate with a proxy service, random user agent, and still getting blocked(403) occasionally by the site which I'm performing the test.