Components within panelTabs of a panelTabGroup cannot have the same ID or the following exception is thrown:

javax.servlet.jsp.JspException: Duplicate component id

The problem can be shown using the following code snippet.

<ice:form id="formID">

    <ice:panelTabSet id="setID">
    
        <ice:panelTab id="tab01">
            <ice:inputText id="inputID" value="Red"/>
        </ice:panelTab>
        
        <ice:panelTab id="tab02">
            <ice:inputText id="inputID" value="Blue"/>
        </ice:panelTab>
         
    </ice:panelTabSet>
    
</ice:form>


The IDs for the input text fields ends up being:

For the "Red" input text: formID:setID:inputID
For the "Blue" input text: formID:setID:inputID

The problem is that the panelTab ID is missing. Investigating the code, it appears that the panelTab component does not implement the NamingContainer interface and therefore does not override the getClientID method which should get injected into the final client ID.