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ClientDisconnect thrown from Starlette for FastApi Integration

See original GitHub issue

How do you use Sentry?

Sentry Saas (



Steps to Reproduce

  1. Install the lib v1.9.0;
  2. Configure the sentry initialization as described in the release documentation:
from fastapi import FastAPI
from sentry_sdk.integrations.starlette import StarletteIntegration
from sentry_sdk.integrations.fastapi import FastApiIntegration

app = FastAPI()

Originally my application (which is running on Rancher k8s, behind an nginx ingress controller) has a SentryAsgiMiddleware instrumented and function normally. However, when I switch to use the new beta FastApiIntegration(), my application can start but would throw errors for all requests.

Strangely though, this setup would work locally when I am using localhost.

Expected Result

My FastAPI server instance should function normally. Messages and errors should be captured and sent to my Sentry SAAS instance.

Actual Result

The server hangs up on request to the server. An ClientDisconnect Error is thrown and received by Sentry.


Issue Analytics

  • State:closed
  • Created a year ago
  • Reactions:1
  • Comments:7 (2 by maintainers)

github_iconTop GitHub Comments

biel-michaelcommented, Aug 5, 2022

@antonpirker We have tried to use #1532. It seems like the head of that branch has indeed fixed the issue! Here are some screenshots for the result:

fastapi-sentry-branch k8s-sentry sentry-branch

We have also double checked that the released v1.9.0 version of the library is not working, as we have previously depicted when we opened the issue.

biel-michaelcommented, Aug 12, 2022

After a few trials, we settled with v1.9.3 and it is running live on production. We are still in the progress of instrumenting our frontend repository but everything is looking good on the Python side right now!

Read more comments on GitHub >

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