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https://issues.apache.org/jira/browse/NIFI-16326?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Matt Casters reassigned NIFI-16326:
-----------------------------------
Assignee: Matt Casters
> Subsequent Parameter Context inheritance changes do not update effective
> parameter values
> -----------------------------------------------------------------------------------------
>
> Key: NIFI-16326
> URL: https://issues.apache.org/jira/browse/NIFI-16326
> Project: Apache NiFi
> Issue Type: Bug
> Affects Versions: 2.11.0
> Reporter: Sven Van Kerrebroeck
> Assignee: Matt Casters
> Priority: Major
> Attachments: image-2026-09-09-12-44-21-772.png,
> image-2026-09-09-12-44-39-772.png
>
>
> h2. Description
> When changing the inheritance configuration of an existing Parameter Context,
> the first inheritance change is applied correctly and the effective parameter
> values are updated as expected.
> However, subsequent inheritance changes on the same Parameter Context are not
> reflected in the effective parameter values.
> The configured inheritance itself is updated correctly, but NiFi continues
> using the parameter value that became effective after the first inheritance
> change.
> This can occur with both:
> * reordering inherited Parameter Contexts
> * adding or removing inherited Parameter Contexts
> The issue therefore appears to be related to repeated updates of the
> inheritance configuration, rather than to a specific inheritance operation.
> h2. Steps to reproduce
> # Create a Parameter Context named {{{}Context A{}}}.
> # Add the following parameter:
> Name: {{test.parameter}}
> Value: {{VALUE_A}}
> # Create a Parameter Context named {{{}Context B{}}}.
> # Add the same parameter:
> Name: {{test.parameter}}
> Value: {{VALUE_B}}
> # Create a Parameter Context named {{{}Context C{}}}.
> # Configure {{Context C}} to inherit from:
> Context A
> Context B
> # Verify that the effective value of {{test.parameter is VALUE_A}}
> # Edit {{Context C}} and reorder the inherited Parameter Contexts to:
> Context B
> Context A
> # Save the Parameter Context.
> # Verify the effective value again. {{test.parameter is VALUE_B}} now
> So far so good.
> Now a second edit:
> # Edit {{Context C}} again.
> # Reorder the inherited Parameter Contexts back to:
> Context A
> Context B
> # Save the Parameter Context.
> # Check the effective value of {{test.parameter}} -> this time it still says
> {{{}VALUE_B{}}}, while it should be A again...
> !image-2026-09-09-12-44-21-772.png|width=479,height=165!
> !image-2026-09-09-12-44-39-772.png|width=397,height=135!
>
> The value from the previous inheritance state is still used.
> The same stale value is also observed by Process Groups and components using
> {{{}Context C{}}}.
> The effective value should change back to: {{VALUE_A}} because {{Context A}}
> once again has the highest precedence in the inheritance order.
> Each change to the inheritance configuration should trigger a recalculation
> of the effective parameter values.
> h2. Additional reproduction
> The same behavior can also be reproduced using add/remove operations instead
> of reordering.
> Example:
> # Create {{Context C}} again (from scratch), now inheriting only from
> {{{}Context B{}}}.
> # Verify that {{test.parameter}} resolves to {{{}VALUE_B{}}}. -> OK
> # Edit {{Context C}} and add {{Context A}} before {{{}Context B{}}}.
> # Save.
> # Verify that the effective value correctly changes to {{{}VALUE_A{}}}. -> OK
> # Edit {{Context C}} again and remove {{{}Context A{}}}.
> # Save.
> Result? The inheritance correctly shows only {{{}Context B{}}}, but the
> effective value remains {{{}VALUE_A now..{}}}. This is not possible, context
> A is removed so the effective value should now be {{{}VALUE_B{}}}.
> h2. Impact
> After the first inheritance update, further changes to the same Parameter
> Context can leave stale effective parameter values active.
> This causes the configured inheritance hierarchy and the effective parameter
> values used by the flow to become inconsistent.
> As a result, Process Groups and components may continue using values from a
> previous inheritance configuration, even though the current Parameter Context
> configuration indicates a different effective value.
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