java ee - @Named + @RequestScoped not working in JSF 2.0 with JBoss 7.1.1 -

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i have working @managedbean i'd substitute @named + @requestscoped bean. 

// before @managedbean public class login {    ... }  // after import javax.enterprise.context.requestscoped; @named @requestscoped public class login {    ... }

everything works fine long use @managedbean. @named without @requestscoped works creates new instance each el-expression. @named + @requestscoped yields exception: unable add request scoped cache item when request cache not active

java.lang.illegalstateexception: unable add request scoped cache item when request cache not active     @ org.jboss.weld.context.cache.requestscopedbeancache.additem(requestscopedbeancache.java:51)     @ de.prosis.dafe.presentation.login$proxy$_$$_weldclientproxy.getusername(login$proxy$_$$_weldclientproxy.java)     @ sun.reflect.nativemethodaccessorimpl.invoke0(native method)     @ sun.reflect.nativemethodaccessorimpl.invoke(nativemethodaccessorimpl.java:39)     @ sun.reflect.delegatingmethodaccessorimpl.invoke(delegatingmethodaccessorimpl.java:25)     @ java.lang.reflect.method.invoke(method.java:597)     @ javax.el.beanelresolver.getvalue(beanelresolver.java:302)     @ com.sun.faces.el.demuxcompositeelresolver._getvalue(demuxcompositeelresolver.java:176)     @ com.sun.faces.el.demuxcompositeelresolver.getvalue(demuxcompositeelresolver.java:203)     @ org.apache.el.parser.astvalue.getvalue(astvalue.java:169)     @ org.apache.el.valueexpressionimpl.getvalue(valueexpressionimpl.java:189)     @ org.jboss.weld.el.weldvalueexpression.getvalue(weldvalueexpression.java:50)     @ com.sun.faces.facelets.el.tagvalueexpression.getvalue(tagvalueexpression.java:109)     @ javax.faces.component.componentstatehelper.eval(componentstatehelper.java:194)     ...

empty beans.xml exist. there gotchas or bugs i'm not aware of? bet i'm missing bug. googled exception message haven't found source of class raises it. in advance!

update: related code omitted. login bean tries invalidate session in constructor, fails if named bean (not always, if spam f5 seems works after few times) , works managed bean. can explain behaviour?

public login() {             httpsession session = (httpsession) facescontext.getcurrentinstance().getexternalcontext().getsession(false);             if (session != null) {                 session.invalidate();             } }

code comes tutorial: http://www.greenkode.com/2011/09/user-authentication-and-authorization-using-jaas-and-servlet-3-0-login/

fixed removing invalidation of session in constructor. still don't know why @managedbean works , @named not.


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