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https://issues.apache.org/jira/browse/NIFI-3950?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16171124#comment-16171124
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ASF GitHub Bot commented on NIFI-3950:
--------------------------------------

Github user jvwing commented on the issue:

    https://github.com/apache/nifi/pull/2140
  
    More migration notes:
    
    * My 1.3.0 AWS processor worked OK without modification when used with this 
PR.
    * My 1.3.0 AWS controller service did not work with just the NAR file, with 
the expected incompatibility error:
    
    > AWS Credentials Provider service' validated against 
'8902b809-015e-1000-46c3-e321c1d9a1b4' is invalid because SampleAWSCreds - 
1.3.0 from sample - sample-aws-services-nar is not compatible with 
AWSCredentialsProviderService - 1.4.0-SNAPSHOT from org.apache.nifi - 
nifi-aws-nar
    
    * However, if `nifi-aws-nar-1.3.0.nar` was included side-by-side with 
`nifi-aws-nar-1.4.0.nar`, the 1.3.0 processor worked with the 1.3.0 controller 
service, unchanged.
    
    @bbende , I'm not sure the last option is what you described above.  I was 
expecting to add more NARs.  But it seemed plausible that the monolithic nature 
of nifi-aws-nar-1.3.0.nar might make it easier to dump in side-by-side?


> Separate AWS ControllerService API
> ----------------------------------
>
>                 Key: NIFI-3950
>                 URL: https://issues.apache.org/jira/browse/NIFI-3950
>             Project: Apache NiFi
>          Issue Type: Improvement
>            Reporter: James Wing
>            Priority: Minor
>
> The nifi-aws-bundle currently contains the interface for the 
> AWSCredentialsProviderService as well as the service implementation, and 
> dependent abstract classes and processor classes.
> This results in the following warning logged as NiFi loads:
> {quote}
> org.apache.nifi.nar.ExtensionManager Component 
> org.apache.nifi.processors.aws.s3.PutS3Object is bundled with its referenced 
> Controller Service APIs 
> org.apache.nifi.processors.aws.credentials.provider.service.AWSCredentialsProviderService.
>  The service APIs should not be bundled with component implementations that 
> reference it.
> {quote}
> Some [discussion of this issue and potential solutions occurred on the dev 
> list|http://apache-nifi.1125220.n5.nabble.com/Duplicated-processors-when-using-nifi-processors-dependency-td17038.html].
> We also need a migration plan in addition to the new structure.



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