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https://issues.apache.org/jira/browse/NIFI-2078?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15345598#comment-15345598
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ASF GitHub Bot commented on NIFI-2078:
--------------------------------------

GitHub user ijokarumawak opened a pull request:

    https://github.com/apache/nifi/pull/563

    NIFI-2078: External state management.

    - Added ExternalStateManager to handle components' state managed
      externally
    - Added UI codes to display external state
    - Added view/clear functionality to ConsumeKafka
    - Added view/clear functionality to GetKafka
    - Capture property value change, so that external state can be accessed
      before onTrigger is called
    
    TODO:
    - Test with Kerberized Zookeeper and Kafka
    - Fix Component State UI issues
    - Fix Expression Language of ConsumeKafka properties

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/ijokarumawak/nifi nifi-2078

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/nifi/pull/563.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #563
    
----
commit bb630fae8ce98c89fbfb4122e57bcf7fe83ba35f
Author: Koji Kawamura <[email protected]>
Date:   2016-06-23T02:29:32Z

    NIFI-2078: External state management.
    
    - Added ExternalStateManager to handle components' state managed
      externally
    - Added UI codes to display external state
    - Added view/clear functionality to ConsumeKafka
    - Added view/clear functionality to GetKafka
    - Capture property value change, so that external state can be accessed
      before onTrigger is called

----


> State management for processors whose states are managed externally
> -------------------------------------------------------------------
>
>                 Key: NIFI-2078
>                 URL: https://issues.apache.org/jira/browse/NIFI-2078
>             Project: Apache NiFi
>          Issue Type: Improvement
>          Components: Core Framework
>            Reporter: Koji Kawamura
>            Assignee: Koji Kawamura
>             Fix For: 1.0.0
>
>
> Inherently by the nature of a given processor it may involve state managed by 
> itself (using nifi state management), or can be managed by some external 
> service it interacts with (kafka's offset), and theoretically some might have 
> both going on. With the new state management, we're giving users a way to 
> reset state managed by nifi for a given processor. But it doesnt apply to 
> those processors who have external state.
> we should consider offering a way to reset state that allows a processor to 
> call out to whatever external store it impacts



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