I am using the primefaces example of the chat, apparently I have an exception when trying to open the channel

Occurs at the time of loading the page, in addition to the parcer does not find the channel room or can not read some characters.

<p:socket onMessage="handleMessage" channel="/{room}" autoConnect="false" widgetVar='subscriber' />

Caused by:

java.lang.IllegalArgumentException: [/context/primepush/{room}] is not a valid URL fragment. Consider encoding relevant portions of the URL with [class org.ocpsoft.urlbuilder.util.Encoder]

my web.xml

<servlet>
        <servlet-name>Push Servlet</servlet-name>
        <servlet-class>org.primefaces.push.PushServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
        <async-supported>true</async-supported>
    </servlet>
    <servlet-mapping>
        <servlet-name>Push Servlet</servlet-name>
        <url-pattern>/primepush/*</url-pattern>
    </servlet-mapping>

in my bean

 public void login(BLogin log) {
RequestContext requestContext = RequestContext.getCurrentInstance();
         username=log.getLogNombres()+" "+log.getLogApellidos();
        if(users.contains(username)) {
            //loggedIn = false;
            //FacesContext.getCurrentInstance().addMessage(null, new FacesMessage(FacesMessage.SEVERITY_ERROR, "Username taken", "Try with another username."));
            //requestContext.update("growl");
           // requestContext.execute("PF('subscriber').connect('/" + username + "')");
            loggedIn = true;
        }
        else{
            users.add(username);
            requestContext.execute("PF('subscriber').connect('/" + username + "')");
            loggedIn = true;
        }
    }

my xhtml

<f:metadata>
            <f:event type="preRenderView" listener="#{chatView.login(bLoginController.getbLogin())}" />
        </f:metadata>
            <p:growl id="growl" showDetail="true"/>
            <p:socket onMessage="handleMessage" channel="/{room}" autoConnect="false" widgetVar='subscriber' />
            <script type="text/javascript">
                function handleMessage(message) {
                    var chatContent = $(PrimeFaces.escapeClientId('form:public')),
                            text = (message.user) ? message.user + ':' + message.text : message.text;

                    chatContent.append(text + '<br />');

                    //keep scroll
                    chatContent.scrollTop(chatContent.height());

                    if (message.updateList) {
                        updateList();
                    }
                }
            </script>

I try

        <p:socket onMessage="handleMessage" channel="/%7Broom%7D"  

and other error

16:16:21,998 SEVERE [javax.enterprise.resource.webcontainer.jsf.application] (default task-16) Error Rendering View[/pages/home.xhtml]: java.lang.IllegalStateException: No parameter [room] was set in the pattern [/context/primepush/{room}]. Call address.set("room", value); or remove the parameter from the pattern.

The solution is to only write / room without the relatives and the connections were created correctly

<p:socket onMessage="handleMessage" channel="/room" autoConnect="false" widgetVar='subscriber' />