UT010041: The servlet context has already been initialized, you can only call this method from a ServletContainerInitializer or a ServletContextListener

Issue

• Calling sessionCookieConfig.setSecure within a servlet's init results in the following exception on EAP 7:

ERROR [org.jboss.msc.service.fail] (ServerService Thread Pool -- 71) MSC000001: Failed to start service jboss.undertow.deployment.default-server.default-host./ProblemSample: org.jboss.msc.service.StartException in service jboss.undertow.deployment.default-server.default-host./ProblemSample: java.lang.IllegalStateException: UT010041: The servlet context has already been initialized, you can only call this method from a ServletContainerInitializer or a ServletContextListener
    at org.wildfly.extension.undertow.deployment.UndertowDeploymentService$1.run(UndertowDeploymentService.java:85)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run(Thread.java:748)
    at org.jboss.threads.JBossThread.run(JBossThread.java:320)
Caused by: java.lang.IllegalStateException: UT010041: The servlet context has already been initialized, you can only call this method from a ServletContainerInitializer or a ServletContextListener
    at io.undertow.servlet.spec.SessionCookieConfigImpl.setSecure(SessionCookieConfigImpl.java:145)
    at es.sample.problem.ThreadServlet.init(ThreadServlet.java:35)
    at io.undertow.servlet.core.LifecyleInterceptorInvocation.proceed(LifecyleInterceptorInvocation.java:117)
    at org.wildfly.extension.undertow.security.RunAsLifecycleInterceptor.init(RunAsLifecycleInterceptor.java:78)
    at io.undertow.servlet.core.LifecyleInterceptorInvocation.proceed(LifecyleInterceptorInvocation.java:103)
    at io.undertow.servlet.core.ManagedServlet$DefaultInstanceStrategy.start(ManagedServlet.java:239)
    at io.undertow.servlet.core.ManagedServlet.createServlet(ManagedServlet.java:133)
    at io.undertow.servlet.core.DeploymentManagerImpl.start(DeploymentManagerImpl.java:527)
    at org.wildfly.extension.undertow.deployment.UndertowDeploymentService.startContext(UndertowDeploymentService.java:101)
    at org.wildfly.extension.undertow.deployment.UndertowDeploymentService$1.run(UndertowDeploymentService.java:82)
    ... 6 more

• This worked previously on EAP 6 so we would expect it to work on EAP 7.