undertow not reading cookie name properly

I am trying to port an app from jboss 7.1 to wildfly.

But I am getting the following error after I login:

21:29:54,295 ERROR [io.undertow.request] (default task-56) Servlet request failed HttpServerExchange

{ POST /oviyam/j_security_check}

: java.lang.IllegalArgumentException: Cookie name "Dark%20Hive; JSESSIONID" is a reserved token
at javax.servlet.http.Cookie.<init>(Cookie.java:192) [jboss-servlet-api_3.1_spec-1.0.0.Beta1.jar:1.0.0.Beta1]
at io.undertow.servlet.spec.HttpServletRequestImpl.getCookies(HttpServletRequestImpl.java:139) [undertow-servlet-1.0.0.Beta3.jar:1.0.0.Beta3]
at io.undertow.servlet.handlers.security.ServletFormAuthenticationMechanism.handleRedirectBack(ServletFormAuthenticationMechanism.java:63) [undertow-servlet-1.0.0.Beta3.jar:1.0.0.Beta3]
at io.undertow.security.impl.FormAuthenticationMechanism.runFormAuth(FormAuthenticationMechanism.java:118) [undertow-core-1.0.0.Beta3.jar:1.0.0.Beta3]
at io.undertow.security.impl.FormAuthenticationMechanism.authenticate(FormAuthenticationMechanism.java:81) [undertow-core-1.0.0.Beta3.jar:1.0.0.Beta3]
at io.undertow.security.impl.SecurityContextImpl$AuthAttempter.transition(SecurityContextImpl.java:279) [undertow-core-1.0.0.Beta3.jar:1.0.0.Beta3]
at io.undertow.security.impl.SecurityContextImpl$AuthAttempter.transition(SecurityContextImpl.java:296) [undertow-core-1.0.0.Beta3.jar:1.0.0.Beta3]
at io.undertow.security.impl.SecurityContextImpl$AuthAttempter.access$100(SecurityContextImpl.java:266) [undertow-core-1.0.0.Beta3.jar:1.0.0.Beta3]
at io.undertow.security.impl.SecurityContextImpl.attemptAuthentication(SecurityContextImpl.java:131) [undertow-core-1.0.0.Beta3.jar:1.0.0.Beta3]
at io.undertow.security.impl.SecurityContextImpl.authTransition(SecurityContextImpl.java:106) [undertow-core-1.0.0.Beta3.jar:1.0.0.Beta3]
at io.undertow.security.impl.SecurityContextImpl.authenticate(SecurityContextImpl.java:99) [undertow-core-1.0.0.Beta3.jar:1.0.0.Beta3]
at io.undertow.security.handlers.AuthenticationCallHandler.handleRequest(AuthenticationCallHandler.java:50) [undertow-core-1.0.0.Beta3.jar:1.0.0.Beta3]
at io.undertow.security.handlers.AuthenticationConstraintHandler.handleRequest(AuthenticationConstraintHandler.java:51) [undertow-core-1.0.0.Beta3.jar:1.0.0.Beta3]
at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:45) [undertow-core-1.0.0.Beta3.jar:1.0.0.Beta3]
at io.undertow.servlet.handlers.security.ServletSecurityConstraintHandler.handleRequest(ServletSecurityConstraintHandler.java:55) [undertow-servlet-1.0.0.Beta3.jar:1.0.0.Beta3]
at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:58) [undertow-core-1.0.0.Beta3.jar:1.0.0.Beta3]
at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:65) [undertow-servlet-1.0.0.Beta3.jar:1.0.0.Beta3]
at io.undertow.security.handlers.SecurityInitialHandler.handleRequest(SecurityInitialHandler.java:70) [undertow-core-1.0.0.Beta3.jar:1.0.0.Beta3]
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25) [undertow-core-1.0.0.Beta3.jar:1.0.0.Beta3]
at org.wildfly.extension.undertow.security.SecurityContextCreationHandler.handleRequest(SecurityContextCreationHandler.java:54)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25) [undertow-core-1.0.0.Beta3.jar:1.0.0.Beta3]
at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:185) [undertow-servlet-1.0.0.Beta3.jar:1.0.0.Beta3]
at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:172) [undertow-servlet-1.0.0.Beta3.jar:1.0.0.Beta3]
at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:56) [undertow-servlet-1.0.0.Beta3.jar:1.0.0.Beta3]
at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:107) [undertow-servlet-1.0.0.Beta3.jar:1.0.0.Beta3]
at io.undertow.server.HttpHandlers.executeRootHandler(HttpHandlers.java:36) [undertow-core-1.0.0.Beta3.jar:1.0.0.Beta3]
at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:629) [undertow-core-1.0.0.Beta3.jar:1.0.0.Beta3]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [rt.jar:1.7.0_21]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [rt.jar:1.7.0_21]
at java.lang.Thread.run(Thread.java:722) [rt.jar:1.7.0_21]

This does work properly on 7.1.

And the cookie name is just Dark%20Hive