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https://issues.apache.org/jira/browse/MYFACES-4667?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17848226#comment-17848226
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SteGr commented on MYFACES-4667:
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Kind of, yes.
Your found issue just mentions the restriction for renderers. But according to
BalusC, the spec does not mention the check on {{UIColumn}} for
{{{}invokeOnComponent{}}}. So this could be fixed without a spec change.
> UIData#invokeOnComponent does not find components
> -------------------------------------------------
>
> Key: MYFACES-4667
> URL: https://issues.apache.org/jira/browse/MYFACES-4667
> Project: MyFaces Core
> Issue Type: Bug
> Affects Versions: 2.3.10
> Reporter: SteGr
> Priority: Major
>
> While working an a bug in [mojarra
> implementation|https://github.com/eclipse-ee4j/mojarra/issues/5445#issuecomment-2115154280]]
> I found an [old primefaces
> issue|https://github.com/primefaces/primefaces/issues/9245#issuecomment-2122507698]
> which was somehow related to my issue. Using the reproducer of that PF
> issue, I was able to really find the root cause of the issue and that even
> myfaces is affected - contrary to what was assumed at the time.
>
> *What happens?*
> A {{p:datatable}} with {{p:column*s*}} was updated by the backend using
> {{{}PrimeFaces#Ajax#update{}}}. The implementation used
> {{UIComponent#invokeOnComponent}} to find the component of the given
> clientId. As {{p:dataTable}} relies on {{UIData}} of myfaces, {{p:columns}}
> won't be handled. Nothing could be found and {{PrimeFaces#Ajax#update}} falls
> back to just forwarding the given clientId.
> *Why does it happen?*
> Like mojarra, myfaces filters the children on processing using {{{}instanceof
> UIColumn{}}}. But {{p:columns}} does not extend that class. Therefore
> {{p:columns}} is not a candiate and is simply ignored.
> *Possible fix* (not yet tested)
> Remove the check.
> *How to reproduce*
> Use the [reproducer
> |https://github.com/primefaces/primefaces/files/9664695/primefaces-test.zip]
> and change the PROJECT_STAGE to Development. Run the project using the
> myfaces23 profile. You should get a lot of logging entries like
> {quote}Mai 21, 2024 2:53:41 PM org.primefaces.PrimeFaces$Ajax update
> WARNUNG: PrimeFaces.current().ajax().update() called but component cant be
> resolved! Expression will just be added to the renderIds: \{0}
> {quote}
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