"BrowserType.connect_over_cdp: Timeout 60000ms exceeded" error

[p44]

Hi everyone,

I’m encountering an issue with changedetection.io.

When attempting to perform a website check, I receive the following error:

Exception: BrowserType.connect_over_cdp: Timeout 60000ms exceeded. Call log:

• ws://0.0.0.0:3000/
• ws://0.0.0.0:3000/

Troubleshooting Attempts:

• Restarted the app.
• Restarted Cloudron.

Is this a known issue?

Thanks in advance for any insights!

Edit: this is part of log:

Jun 18 13:51:50 xxx.xxx.xxx.xxx - - [18/Jun/2025 11:51:50] "GET / HTTP/1.1" 302 -
Jun 18 13:51:51 2025-06-18 11:51:51.067 | DEBUG | __main__:_request_retry:422 - WebSocket ID: xxxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx - _request_retry attempt 14/20 for http://localhost:10280/json/version (timeout=11.5s)
Jun 18 13:51:51 2025-06-18 11:51:51.069 | INFO | __main__:stats_thread_func:704 - Connections: Active count 1 of max 10, Total processed: 282.
Jun 18 13:51:51 2025-06-18 11:51:51.071 | WARNING | __main__:_request_retry:441 - WebSocket ID: xxxxxxxxx-xxxxxxxxx-xxxx-xxxx-xxxxxxxxxxxx - Network error connecting to Chrome at http://localhost:10280/json/version, retrying (attempt 14/20)...
Jun 18 13:51:51 2025-06-18 11:51:51.073 | INFO | __main__:stats_thread_func:727 - Process info: 6 child processes
Jun 18 13:51:54 2025-06-18 11:51:54.075 | DEBUG | __main__:_request_retry:422 - WebSocket ID: xxxxxxxxx-xxxxxxxxx-xxxx-xxxx-xxxxxxxxxxxx - _request_retry attempt 15/20 for http://localhost:10280/json/version (timeout=12.0s)
Jun 18 13:51:54 2025-06-18 11:51:54.075 | INFO | __main__:stats_thread_func:704 - Connections: Active count 1 of max 10, Total processed: 282.
Jun 18 13:51:54 2025-06-18 11:51:54.080 | WARNING | __main__:_request_retry:441 - WebSocket ID: xxxxxxxxx-xxxxxxxxx-xxxx-xxxx-xxxxxxxxxxxx - Network error connecting to Chrome at http://localhost:10280/json/version, retrying (attempt 15/20)...
Jun 18 13:51:54 2025-06-18 11:51:54.081 | INFO | __main__:stats_thread_func:727 - Process info: 6 child processes
Jun 18 13:51:57 2025-06-18 11:51:57.083 | DEBUG | __main__:_request_retry:422 - WebSocket ID: xxxxxxxxx-xxxxxxxxx-xxxx-xxxx-xxxxxxxxxxxx - _request_retry attempt 16/20 for http://localhost:10280/json/version (timeout=12.5s)
Jun 18 13:51:57 2025-06-18 11:51:57.083 | INFO | __main__:stats_thread_func:704 - Connections: Active count 1 of max 10, Total processed: 282.
Jun 18 13:51:57 2025-06-18 11:51:57.087 | WARNING | __main__:_request_retry:441 - WebSocket ID: xxxxxxxxx-xxxxxxxxx-xxxx-xxxx-xxxxxxxxxxxx - Network error connecting to Chrome at http://localhost:10280/json/version, retrying (attempt 16/20)...
Jun 18 13:51:57 2025-06-18 11:51:57.089 | INFO | __main__:stats_thread_func:727 - Process info: 6 child processes
Jun 18 13:52:00 xxx.xxx.xxx.xxx - - [18/Jun/2025 11:52:00] "GET / HTTP/1.1" 302 -

[james]

Hello @p44
When I visit changedetection.io even the browser loads for almost 60000ms to load all content.

So I am assuming now that this is simply an issue of the site itself being slow and truly triggering a timeout in the app.

[p44]

@james is going to be happen to about 1/3 of checked websites... I don't think is nornal... Never had this issue before...

[james]

Hello @p44

@p44 said in "BrowserType.connect_over_cdp: Timeout 60000ms exceeded" error:

Never had this issue before...

I've also created a setup and was running it since my last post.
I had zero failures for 23 web pages.

[p44]

Very strange, could be a resource allocation issue? @james

[james]

Hello @p44
Could be but could also be some sites throttling this specific agent after some time.

[p44]

@james Ok thanks a lot ... or maybe some broken update... I should open a ticket on their GitHub area

[p44]

@james Some other user opened an issue: https://github.com/dgtlmoon/changedetection.io/discussions/2593 Please have a look. Thanks

[james]

@p44
This person had a solution for himself => https://github.com/dgtlmoon/changedetection.io/discussions/2593#discussioncomment-13567391
Might be also helpful to you.

[p44]

@james thanks, what is the standard value for FETCH_WORKERS in Cloudron?

[james]

It seems Cloudron sticks to the default:

https://github.com/dgtlmoon/changedetection.io/blob/58e2a41c9558a242e732320af4ab0b0ae6efe326/changedetectionio/realtime/README.md?plain=1#L107

| `FETCH_WORKERS` | `10` | Number of async workers for watch processing |

Also there is this line:
https://github.com/dgtlmoon/changedetection.io/blob/58e2a41c9558a242e732320af4ab0b0ae6efe326/changedetectionio/flask_app.py#L596

    # Start the async workers during app initialization
    # Can be overridden by ENV or use the default settings
    n_workers = int(os.getenv("FETCH_WORKERS", datastore.data['settings']['requests']['workers']))

Which is also confirmed by the web ui:

[p44]

@james Thanks. I changed value to "2" on the web UI, let see what will happen.

Thanks a lot for your patience and your support, James

[james]

@p44 said in "BrowserType.connect_over_cdp: Timeout 60000ms exceeded" error:

Thanks a lot for your patience and your support, James

No worries! That's what I'm here for.
Also, don't thank me yet, the issue is not resolved yet.

[p44]

@james thanks again. I confirm problem is solved reducing value to "2".

[james]

Hello @p44
Great to read!
Do you mind sharing the server hardware specifications, and what resources limits you have set for the app?
This might be useful for future readers to get an idea of resource loads.

[p44]

@james for sure:

Hetzner vServer
CPU4 Core "AMD EPYC-Milan Processor"
Memory16.37 GB RAM & 4.29 GB Swap
Cloudron v8.3.2 on Ubuntu 22.04.5 LTS
Allocated Ram: 4GB
Websites monitored: 150 each 12 hours