Invoked if a Throwable occurs while evaluating the BODY inside a tag or in any of the following methods: Tag.doStartTag(), Tag.doEndTag(), IterationTag.doAfterBody() and BodyTag.doInitBody().
This method is not invoked if the Throwable occurs during one of the setter methods.
This method may throw an exception (the same or a new one) that will be propagated further the nest chain. If an exception is thrown, doFinally() will be invoked.
This method is intended to be used to respond to an exceptional condition.
@param t The throwable exception navigating through this tag.