AKS Istio ingress controller and using k8s gateway api

[veldpworld]

We deployed aks istio 1-23 version ingress controller and using gateway api 1.2

istio version : aks - 1.23
gateway api version: 1.2
error: upstream connect error or disconnect/reset before headers. reset reason: protocol error
reason: when try to download the file it gives the above error.

> POST /ledger/api/v1/documents/download-documents?documentId=a736d26d-6fa1-45e9-a628-310a44a80a7e HTTP/1.1
> Host: dev-finance-erp.cargoes.com
> User-Agent: curl/7.81.0
> accept: */*
> Content-Type: application/json
> Cookie: JSESSIONID=5F69D25B5EE5592A2BDB889797A77DCD; JSESSIONID=796158313F43AFE548B32165926D4C97
> Content-Length: 322
>
* Mark bundle as not supporting multiuse
< HTTP/1.1 502 Bad Gateway
< content-length: 87
< content-type: text/plain
< date: Tue, 25 Mar 2025 07:18:02 GMT
< server: istio-envoy
<
* Connection #0 to host dev-finance-erp.cargoes.com left intact
upstream connect error or disconnect/reset before headers. reset reason: protocol errormyvel@DPW-HO-693:~$

we are not using envoy proxy, we use kubernetes gateway api class to refer the istio controller, using httproute we create ingress and it worked fine for get request, but for downloading any file it gave above error

[shaneutt]

Hi @veldpworld, sorry you're having trouble with your implementation!

This repository is only for the specification of Gateway API, not implementations. In other words, we host the API itself here but implementations like Istio will take that and make it part of their usable APIs to configure Istio. What you've posted above seems like something implementation-specific to your Istio.

As such, you might want to check in with your cloud provider (you mentioned "AKS Istio", so perhaps they have support specific to that), or if you come to find with certainty the problem is from upstream Istio, consider checking in https://github.com/istio.