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https://issues.apache.org/jira/browse/KNOX-526?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14485941#comment-14485941
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ASF subversion and git services commented on KNOX-526:
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Commit 016a47dc6b08192a4d762ad305313519dc2f31a5 in knox's branch 
refs/heads/master from [~sumit.gupta]
[ https://git-wip-us.apache.org/repos/asf?p=knox.git;h=016a47d ]

KNOX-526 Added new dispatch classes for backward compatibility


> Dispatch Refactoring Breaks Upgrade Compatibility
> -------------------------------------------------
>
>                 Key: KNOX-526
>                 URL: https://issues.apache.org/jira/browse/KNOX-526
>             Project: Apache Knox
>          Issue Type: Bug
>          Components: Server
>            Reporter: Larry McCay
>            Assignee: Sumit Gupta
>            Priority: Critical
>             Fix For: 0.6.0
>
>
> The refactoring of the dispatch code introduced an incompatibility for 
> upgrades where the data directory is preserved. The gateway.xml file from the 
> previous version has old classnames configured that are still valid classes 
> but no longer Filters.
> We need to continue the refactoring to make the original classes valid 
> Filters that extend the new DispatchFilter and provides whatever is needed in 
> terms of new dispatch-impl config based on the refactoring.



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