Not sure if I missed any thing here. But I am getting the following error when fronting keycloak 1.9.0 CR1 with Apache http server. I am running keycloak 1.9.0 CR1 with Wildfly 10. it is a bug or something I missed in my configuration. My setup is browser -> https -> Apache2 -> ajp -> keycloak 1.9.CR1.
The setup and files are taken from keycloak-1.9.0.CR1.tar.gz with no modification apart from adding the ajp listener on start port 8009.