How to ignore certain Python errors from Sentry capture

Question

I have Sentry configured to capture all errors from a Django+Celery application. It works ok, but I'm finding an obnoxious use case is when I have to restart my Celery workers, PostgreSQL database or messaging server, which causes thousands of various kinds of "database/messaging server cannot be reached" errors. This pollutes the Sentry reports, and sometimes even exceeds my event quota.

Their docs mention an "ignore_exceptions" parameter, but it's in their old deprecated client that I'm not using, nor is recommended to be used for new projects. How would you do this in the new API?

Answer 1

You can use before-send to filter errors by arbitrary criteria. Since it's unclear what you actually want to filter by, here's an example that filters by type. However, you can extend it with custom logic to e.g. match by exception message.

import sentry_sdk

def before_send(event, hint):
    if 'exc_info' in hint:
        exc_type, exc_value, tb = hint['exc_info']
        if isinstance(exc_value, (IgnoredErrorFoo, IgnoredErrorBar)):
            return None
    return event

sentry_sdk.init(before_send=before_send)