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https://issues.apache.org/jira/browse/JENA-523?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13752220#comment-13752220
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Andy Seaborne commented on JENA-523:
------------------------------------

1. Fuseki should separately handle the parse, which is recoverable, error 
outside the actual update, which is not recoverable.
2. Transactional interface may need to indicate if abort is supported; possible 
more styles of transaction than just "everything supported" and "nothing 
supported".
                
> DatasetGraphWithLock throws exception on abort but his can occur in Fuseki
> --------------------------------------------------------------------------
>
>                 Key: JENA-523
>                 URL: https://issues.apache.org/jira/browse/JENA-523
>             Project: Apache Jena
>          Issue Type: Bug
>          Components: ARQ, Fuseki
>            Reporter: Andy Seaborne
>            Assignee: Andy Seaborne
>
> DatasetGraphWithLock can not support a proper abort (no rollback).  But some 
> action, like a parse error in SPARQL Update in Fuseki, cause an abort.  The 
> abort there causes the internal state to become inconsistent.

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