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https://issues.apache.org/jira/browse/NIFI-2854?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Joseph Witt updated NIFI-2854:
------------------------------
    Summary: Enable repositories to support upgrades and rollback in well 
defined scenarios  (was: Allow Provenance Repository to roll back to a previous 
implementation)

> Enable repositories to support upgrades and rollback in well defined scenarios
> ------------------------------------------------------------------------------
>
>                 Key: NIFI-2854
>                 URL: https://issues.apache.org/jira/browse/NIFI-2854
>             Project: Apache NiFi
>          Issue Type: Improvement
>          Components: Core Framework
>            Reporter: Mark Payne
>            Assignee: Mark Payne
>             Fix For: 1.2.0
>
>
> Currently, if we start up a new version of NiFi and the format of the Data 
> Provenance data has changed, we are not able to roll back to a previous 
> version of NiFi. If we do, NiFi will fail to read the Provenance Data and not 
> start up. We should instead provide the ability to write data to the 
> repository in such a way that old versions of the repository will still be 
> able to read the data, so that we can roll back



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