'rich:component' not found: a4j:ajax with a composite component - jsf

Question

I've built a simple composite component - a "richer" commandLink. I want it to support the clientBehavior, but when there is a <a4j:ajax> attached to the component I sometimes get the exception: ELException: Function 'rich:component' not found
It only comes when I use #{rich:component('...')} inside any attribute of <a4j:ajax>. For example oncomplete="#{rich:component('...')}.show()"
Edit: I am getting a Server error, not a JavaScript error.
The composite component (simplified):
<composite:interface>
<composite:attribute name="style" />
<composite:clientBehavior name="click" event="action" targets="commandLink" default="true"/>
</composite:interface>
<composite:implementation>
<h:commandLink id="commandLink" style="#{cc.attrs.style}">
<!-- my custom component content -->
</h:commandLink>
</composite:implementation>
The problematic use of this component looks like this:
<myLib:commandLink value="Custom CmdLink">
<a4j:ajax render="#form" execute="#form"
oncomplete="#{rich:component('myEditPopup')}"/>
</myLib:commandLink>
But the following code works like a charm:
<h:commandLink value="test">
<a4j:ajax render="#form" execute="#form"
oncomplete="#{rich:component('myEditPopup')}.show()"/>
</h:commandLink>
Edit: This one works too:
<a4j:ajax render="#form" execute="#form"
oncomplete="#{rich:component('myEditPopup')}.show()">
<myLib:commandLink value="label"/>
</a4j:ajax>

Answer 1

It seems to be a bug in Mojarra (we have been using the version 2.1.6), that EL lost the namespace "rich".
A working workaround was to declare the namespace in the a4j:ajax tag for each use:
<myLib:commandLink value="Show">
<a4j:ajax render="#form" execute="#form" xmlns:rich="http://richfaces.org/rich"
oncomplete="#{rich:component('myEditPopup')}.show()"/>
</myLib:commandLink>
After updating Mojarra to 2.1.26 the problem is gone and no needs for this workaround.

Answer 2

If you are missing { in your el, you will get the error rich:component not found.
For a4j:commandButton
<a4j:commandButton value="Show" oncomplete="#{rich:component('chargePointDetailPopup')}.show()"/>
For a4j:ajax in commandLink
<h:commandLink value="Show">
<a4j:ajax render="#form" execute="#form" oncomplete="#rich:component('chargePointDetailPopup')}.show()"/>
</h:commandLink>
Make sure to rich:popupPanel
<rich:popupPanel id="chargePointDetailPopup">
......
</rich:popupPanel>
For more Reference