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https://issues.apache.org/jira/browse/MYFACES-1802?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12558369#action_12558369
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Mario Ivankovits commented on MYFACES-1802:
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I'd check the existence of getCause() using reflection as then it will also 
work with pre Java 1.4 Exceptions implementing getCause() - for example those 
Exceptions prepared to be backward compatible.

> FacesException and nested exceptions
> ------------------------------------
>
>                 Key: MYFACES-1802
>                 URL: https://issues.apache.org/jira/browse/MYFACES-1802
>             Project: MyFaces Core
>          Issue Type: Bug
>          Components: JSR-127
>    Affects Versions: 1.1.5
>            Reporter: Bernhard Huemer
>         Attachments: MyFaces-1802.patch
>
>
> The JSF 1.1 specification requires any implementation to support Java 1.3 and 
> that's why the FacesException isn't allowed to utilize builtin exception 
> chaining mechanisms (i.e. initCause(), etc..) as they have been introduced in 
> Java 1.4. However, the FacesException retains it's cause by delegating to the 
> parent's constructor (for example, "super(cause);" or "super(message, 
> cause);"). 
> Although this bug is rather easy to fix, I've assigned the priority level 
> 'Major' as it breaks the specification.

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