Exception in ZuulFilter results in a 401 status code

[JamesMcMahon]

Using zuul-core 1.3.0 (via spring-cloud-starter-zuul 1.3.4.RELEASE) in my project and I noticed that every time an exception happens in a Zuul Filter I see a 401 status code. Is this intentional behavior?

I've tried to par the issue down to the following, if you drop the following Kotlin filter into a new project and CURL at the associated path you should see a 401.

package com.test.zuul.filter

import com.netflix.zuul.ZuulFilter

class TestFilter : ZuulFilter() {

    override fun run(): Any? {
        throw RuntimeException("test")
    }

    override fun shouldFilter(): Boolean {
        return true
    }

    override fun filterType(): String {
        return "pre"
    }

    override fun filterOrder(): Int {
        return 2
    }
}

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