NGINX ingress segfault issue (AKS App Routing Add-on)

bhaveshbjoshi — Fri, 12 Jun 2026 10:13:34 GMT

We’ve observed an segfault issue impacting customers using the following ingress controller image:mcr.microsoft.com/oss/v2/ingress-nginx/controller:v1.13.9

kernel: nginx[4143235]: segfault at 7 ip 00007feb5b80845b sp 00007ffde8362200 error 4 in liboneagentnginx.so

This image is part of AKS Application Routing add-on (managed NGINX ingress by Microsoft)

It uses a patched/custom nginx binary. This image is part of AKS Application Routing add-on (managed NGINX ingress by Microsoft)
Dynatrace NGINX code module (liboneagentnginx.so) relies on fixed assumptions about nginx internals.
Due to this binary mismatch, instrumentation can lead to segfaults in nginx processes.
Microsoft: https://learn.microsoft.com/en-us/azure/aks/app-routing

Disable OneAgent injection for ingress pods/namespace

For cloudNativeFullStack / applicationMonitoring:

For classicFullStack

Disabling injection successfully stops crashes and restores stability.

Link to Azure Github Issue - https://github.com/Azure/AKS/issues/5796
This is currently the only supported workaround.
In case of any other patched NGINX, please follow document
Please open a support ticket incase of any issues/concerns along OneAgent Support archive.

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