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https://issues.apache.org/jira/browse/APEXMALHAR-2083?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15280261#comment-15280261
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Munagala V. Ramanath commented on APEXMALHAR-2083:
--------------------------------------------------

Both XmlParser and the Parser base class are annotated with 
@InterfaceStability.Evolving so incompatible changes are permitted in minor 
versions as described at:
https://hadoop.apache.org/docs/stable/hadoop-project-dist/hadoop-common/InterfaceClassification.html
(pointed out by Thomas).

So we should fix the bugs, move clazz field to subclasses if that makes sense, 
add an application unit test for a more realistic test, and update the javadoc 
comment.

> Revert breaking changes to XmlParser in release 3.3
> ---------------------------------------------------
>
>                 Key: APEXMALHAR-2083
>                 URL: https://issues.apache.org/jira/browse/APEXMALHAR-2083
>             Project: Apache Apex Malhar
>          Issue Type: Bug
>          Components: utilities
>    Affects Versions: 3.3.1
>            Reporter: Munagala V. Ramanath
>
> XmlParser was changed in 3.3 in a way that is not backwards compatible. We 
> need to revert this change in both 3.3 and 3.4.



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