[jira] [Commented] (NIFI-3594) Implement encrypted provenance repository

[ASF GitHub Bot (JIRA)]

    [ 
https://issues.apache.org/jira/browse/NIFI-3594?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15989449#comment-15989449
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ASF GitHub Bot commented on NIFI-3594:
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Github user YolandaMDavis commented on the issue:

    https://github.com/apache/nifi/pull/1686
  
    @alopresto Ran a test where I had an existing unencrypted provenance repo 
and switched to the encrypted provider.  The issues [you've 
documented](https://github.com/alopresto/nifi/blob/276f31aa85d9ec401fb34f939238c6646e187ae6/nifi-docs/src/main/asciidoc/user-guide.adoc#potential-issues)
 did occur (where switching between configuration would lead to errors in the 
log and when querying).  However I'm wondering two things:
    
    1) Can there be a friendlier error message in the logs for those errors? I 
saw lots of errors around ClassCastException between the old and new Record 
Readers. Just wondering if NiFi could simply say detected a mismatch and that 
it could be due to a change in repo providers?
    
    2) I also saw the UI error (see below), however I expected to eventually be 
able to retrieve the events that were subject to encryption. I have a super 
short and small flow that runs every 10s. Perhaps provenance hasn't been 
completely overwritten with the newer encrypted files in my case but each time 
I attempt to query provenance I get the ClassCastException.  
    
    
![image](https://cloud.githubusercontent.com/assets/1371858/25546889/efea31b6-2c32-11e7-9a98-ac78cc95c1bb.png)
    
    
![image](https://cloud.githubusercontent.com/assets/1371858/25546896/f597cad8-2c32-11e7-8502-18d9af37db32.png)
    
    If clearing the provenance repo when changing configurations would resolve 
the issue can that step be included in the documentation (if needed I would 
recommend including that step in the issues section)?


> Implement encrypted provenance repository
> -----------------------------------------
>
>                 Key: NIFI-3594
>                 URL: https://issues.apache.org/jira/browse/NIFI-3594
>             Project: Apache NiFi
>          Issue Type: Sub-task
>          Components: Core Framework
>    Affects Versions: 1.1.1
>            Reporter: Andy LoPresto
>            Assignee: Andy LoPresto
>              Labels: encryption, provenance, repository
>
> I am going to start with the provenance repository, as the new implementation 
> of {{WriteAheadProvenanceRepository}} has the most recent design decisions 
> and has not been available in a released version yet, so there should be 
> minimal backward compatibility concerns. 



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