Primefaces 2 <h:form> and 2<p:message> confusion - validation

Question

My login page has 2 forms, 1 for login itself, and another one to create new users and they are in a tab view(p:tabView), so users will never see both on the page, it would be, one or another.
The problem is that everytime that a valitation fails on login tab, the failure is also shown in the new user tab, and vice-versa.
How to handle this? i tried to set update property in the buttoncommand, but it did not work
see my code below:
<p:tabView id="loginTabView" orientation="right" style="margin-bottom:20px" styleClass="login_fields_panel">
<p:tab title="Acesso" id="acessoTab" >
<h:form>
<h3><h:outputText value="#{bundle.loginHello}" escape="false"/></h3>
<p:messages id="messages_login" showDetail="false" autoUpdate="true" closable="true" showIcon="true"/>
<p:outputLabel for="email" value="#{bundle.label_email}"/>
<p:inputText value="#{loginMB.email}" label="#{bundle.label_email}" id="email" required="true" validatorMessage="#{bundle.emailInvalido}" size="45">
<f:validateRegex pattern="^[\w-\.]+#([\w-]+\.)+[\w-]{2,4}$" for="email" />
</p:inputText>
<br/>
<p:outputLabel for="senha" value="#{bundle.label_password}" />
<p:password value="#{loginMB.password}" id="senha" label="#{bundle.label_password}" required="true" size="45"/>
<br/><br/>
<p:commandButton action="#{loginMB.login}" value="#{bundle.btn_login}" ajax="false" update="messages_login"/>
</h:form>
</p:tab>
<p:tab title="Faça seu cadastro aqui" id="newUserPanel" >
<h:form id="formNewUser">
<h3><h:outputText value="#{bundle.loginHello}" escape="false"/></h3>
<p:messages id="messages_new" showDetail="false" autoUpdate="true" closable="true" showIcon="true" />
<h:panelGrid columns="2" id="matchGrid" cellpadding="1">
<p:outputLabel for="email" value="#{bundle.label_name}: "/>
<p:inputText value="#{loginMB.email}" label="#{bundle.label_name}:" id="name" required="true" validatorMessage="#{bundle.emailInvalido}" size="45" maxlength="100">
</p:inputText>
<p:outputLabel for="email" value="#{bundle.label_email}: "/>
<p:inputText value="#{loginMB.email}" label="#{bundle.label_email}" id="email" required="true" validatorMessage="#{bundle.emailInvalido}" size="45">
<f:validateRegex pattern="^[\w-\.]+#([\w-]+\.)+[\w-]{2,4}$" for="email" />
</p:inputText>
<p:outputLabel for="senha" value="#{bundle.label_password}" />
<p:password value="#{loginMB.password}" id="senha" label="#{bundle.label_password}" required="true" size="45"/>
<p:outputLabel for="senhaConfirmacao" value="#{bundle.label_password_confirmacao}" />
<p:password value="#{loginMB.password}" id="senhaConfirmacao" label="#{bundle.label_password_confirmacao}" required="true" size="45"/>
<p:outputLabel for="birthday" value="#{bundle.label_birthday}" />
<p:calendar id="birthday" value="#{calendarView.date2}" required="true" size="45" pattern="dd/MM/yyyy"/>
</h:panelGrid>
<br/><br/>
<p:commandButton id="btn_create" action="#{loginMB.createUser}" value="#{bundle.btn_criar_usuario}" ajax="true" update="messages_new"/>
</h:form>
</p:tab>
thanks

Answer 1

The described problem with two forms and two message components is actually two-fold:
You're using autoUpdate="true" on those message components. So regardless of what you specify in update attribute, those message components will be auto-updated.
You need to either remove the autoUpdate="true" from the message components, or add ignoreAutoUpdate="true" to the command component.
You're using ajax="false" on the first button. This forces a full page reload. Do note that all ajax-related attribtes such as process and update are ignored in such case.
You need to either re-enable ajax on the first button, or to add redisplay="false" to the second message component.