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Editorial Team
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Asked: 2026-05-28T01:43:02+00:00

A page/bean of mine has its preRenderView event fired twice on the first page

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A page/bean of mine has its preRenderView event fired twice on the first page load then 2 + n times for each postback, where n is the number of postbacks (including the current one) that have occurred.

After reading a few other posts here, I moved <f:event type="preRenderView" listener="myBean.preRenderView"/> outside of <f:metadata/> and that reduced the number of preRenderView calls by one. That is, it is called once on the full page load and 1 + n times for each postback. I even tried to move the <f:event/> tag outside of <f:view/>, but it had no effect.

I’m not sure if this is relevant: The page uses a template:

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:h="http://java.sun.com/jsf/html"
      xmlns:ui="http://java.sun.com/jsf/facelets"
      xmlns:f="http://java.sun.com/jsf/core"
      xmlns:fb="http://www.facebook.com/2008/fbml">
    <f:view contentType="text/html">
        <ui:insert name="metadata"/>
        <h:head>
            <!-- Some stuff here -->
            <ui:insert name="content"/>
            <!-- More stuff here -->
        </h:head>
        <h:body>
        </h:body>
    </f:view>
</html>

And the relevant bits of the page:

<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:h="http://java.sun.com/jsf/html"
      xmlns:f="http://java.sun.com/jsf/core"
      xmlns:ui="http://java.sun.com/jsf/facelets">
    <h:head>
        <title></title>
    </h:head>
    <h:body>
        <ui:composition template="/WEB-INF/templates/myLayout.xhtml">
            <ui:define name="windowTitle">My Page</ui:define>
            <ui:define name="metadata">
                <f:event type="preRenderView" listener="#{myBean.preRenderView}"/>
            </ui:define>
            <ui:define name="content">
                <!-- Some content here -->
                <h:panelGroup id="reRenderable" layout="block">
                    <!-- More content here -->
                    <h:form prependId="false">
                        <h:outputLabel for="mySelector" value="Item:"/>
                        <h:selectOneMenu id="mySelector"
                                         value="#{myBean.item}"
                                         converter="#{myConverter}"
                                         validator="#{itemActiveValidator.validate}">
                            <f:selectItems value="#{myBean.myItems}"/>
                            <f:ajax render=":reRenderable"/>
                        </h:selectOneMenu>
                    </h:form>
                    <!-- More content here -->
                </h:panelGroup>
                <!-- More content here -->
            </ui:define>
        </ui:composition>
    </h:body>
</html>
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1 Answer

  1. Editorial Team

    It looks like yet another Mojarra bug: JAVASERVERFACES-2162

    I applied the workaround as follows and it works:

    <ui:define name="metadata">
    <f:metadata>
        <f:viewParam name="dummy"/>
        <f:event type="preRenderView" listener="#{myRecordsBean.preRenderView}"/>
    </f:metadata>
</ui:define>

    All that’s left to do is push dummy up to the template to keep the pages that use it free from this filth.

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