Stack Overflow on Federated Schema Gateway Service in 13.5.0

[albernhagen]

Is there an existing issue for this?

• I have searched the existing issues

Product

Hot Chocolate

Describe the bug

We have a UI that issues a high number of requests to our gateway service, a number of which do queries in parallel to different domain services. After some time (sorry I don't have better numbers), we get a stack overflow error:

Stack overflow.
Repeat 104670 times:
--------------------------------
at System.HashCode.Combine[[System.__Canon, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.Int32, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]](System.__Canon, Int32)
at HotChocolate.Path+RootPathSegment.GetHashCode()

Steps to reproduce

I wish I could share our repos but they are private. In general, it is:

1. Setup a federated schema service with domain services
2. Issue a high number of client-side concurrent requests to the gateway service of which certain queries include types from both domain services in the same query
3. It'll eventually fail as noted above.

Relevant log output

Noted in the bug description.

Additional Context?

This happens when upgrading to 13.5.0 but does not happen with 13.4.0.

Version

13.5.0

[michaelstaib]

Thanks for reporting ... I will have a look at this and think I know why this is happening.

[michaelstaib]

Its fixed with 13.6.0-preview.4