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https://issues.apache.org/jira/browse/MINIFICPP-2787?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ferenc Gerlits updated MINIFICPP-2787:
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    Summary: Do not encrypt processor properties if they are empty  (was: The 
encryption of a blank Password property in SmbConnectionControllerService 
causes errors on restart)

> Do not encrypt processor properties if they are empty
> -----------------------------------------------------
>
>                 Key: MINIFICPP-2787
>                 URL: https://issues.apache.org/jira/browse/MINIFICPP-2787
>             Project: Apache NiFi MiNiFi C++
>          Issue Type: Bug
>            Reporter: Ferenc Gerlits
>            Assignee: Ferenc Gerlits
>            Priority: Minor
>
> Steps to reproduce:
>  # Create a flow with an SmbConnectionControllerService, eg. ListSmb -> 
> FetchSmb -> PutFile. Leave both the Username and Password properties blank.
>  # Start minifi; the first time everything is fine.
>  # Restart minifi; after the second startup, you will see errors like this:
> {noformat}
> [2026-04-17 18:12:32.038] 
> [org::apache::nifi::minifi::core::controller::StandardControllerServiceNode] 
> [warning] Service 'SmbConnectionControllerService' failed to enable: Process 
> Schedule Operation: Either both a username and a password, or neither of them 
> should be provided.{noformat}
>  # The controller service will not be started. Any processors which depend on 
> the SmbConnectionControllerService will not be started, either.
> I think this is because after the first startup, both properties will be read 
> as unset at first; then minifi will encrypt the (blank) Password property in 
> config.yml. After the second startup, the Username property will be read as 
> unset but the Password property will be read as set to the empty string; this 
> causes the error here:
> {noformat}
> if (password.has_value() != username.has_value())
>   throw Exception(PROCESS_SCHEDULE_EXCEPTION,  "Either both a username and a 
> password, or neither of them should be provided.");{noformat}
>  
> Workaround: if no username/password is required, set them both to some 
> arbitrary value instead of leaving them blank.



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