Filter TypeError - Load Failed by url

[jeengbe]

Problem Statement

With 3rd-party tracking/ads software that doesn't try-catch their queries properly, we are seeing a lot of

with no further stack trace attached.

Since we can't really do anything about those errors and don't want them to eat up our error quota, we block them client-side.
This only works with errors that have a stack trace to the 3rd-party SDK attached to them, which these weirdly don't. What's the best way to filter them?

(This might not be relevant, but: )

Solution Brainstorm

• Can't block all "Load Failed" errors, obviously
• Could filter by last breadcrumb URL and status, would rather not, though as it seems hackish and unstable

[Lms24]

Hi @jeengbe thanks for writing in!

That's a tricky one, I agree.

Can't block all "Load Failed" errors, obviously

I'm assuming you mean because bocking all "Load Failed" errors would also filter out your errors, not just the 3rd party ones, correct?

Generally, errors without stack traces are a very hard problem to filter out correctly. We also don't have a good solution for that. This answer explains the reason for fetch errors without stacktraces quite well. This gave me an idea you could try but I can't guarantee that this solves it better:

1. filter our all "Load Failed" errrors
2. use our CaptureConsole integration to capture the errors logged in the console as Sentry issues. Depending on your console output, you might need to configure additional filter rules though.

This is just an idea. Can't tell you how this performs in practice. I hope this helps a little.

[jeengbe]

I'm assuming you mean because bocking all "Load Failed" errors would also filter out your errors, not just the 3rd party ones, correct?

Yeah, exactly. Wouldn't want to ignore real errors. 😄

I'll try to filter using breadcrumbs first, will come back with some insight.

[jeengbe]

Appears to have worked. 🙂

Go through latest breadcrumbs and check if a blacklisted url has a failed request.

[KevinHerklotz]

@jeengbe could you please provide a code snippet on how you do this filtering? 🙂

[jeengbe]

Hi @KevinHerklotz, sure!
See this gist: https://gist.github.com/jeengbe/4bc86f05a41a1831e6abf2369579cc7a