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https://issues.apache.org/jira/browse/UIMA-5185?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Marshall Schor resolved UIMA-5185.
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    Resolution: Fixed

> uv3 throw new exception v2 binary delta deserialization 
> --------------------------------------------------------
>
>                 Key: UIMA-5185
>                 URL: https://issues.apache.org/jira/browse/UIMA-5185
>             Project: UIMA
>          Issue Type: Improvement
>          Components: Core Java Framework
>            Reporter: Marshall Schor
>            Assignee: Marshall Schor
>            Priority: Minor
>             Fix For: 3.0.0SDKexp
>
>
> Version 3 models the v2 layout by scanning all reachable FSs; this drops 
> (versus v2) unreachable FSs.  Binary form deltas encode the changes relative 
> to this model. Because the model for v3 doesn't match v2's (due to the 
> omission of unreachable FSs), delta updates can't be handled when reading a 
> v2-generated delta cas into a v3 instance.  
> Throw an exception for this case (using binary deserializing of Delta CASs 
> generated using V2 into a V3 instance).  Document this in the backwards 
> compatibility section.



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