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https://issues.apache.org/jira/browse/NIFI-15870?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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David Handermann resolved NIFI-15870.
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Resolution: Won't Fix
> Improve error message when flow upgrade fails because a referenced controller
> service is ENABLED
> ------------------------------------------------------------------------------------------------
>
> Key: NIFI-15870
> URL: https://issues.apache.org/jira/browse/NIFI-15870
> Project: Apache NiFi
> Issue Type: Improvement
> Components: Core Framework
> Reporter: Dominik Bartos
> Assignee: Dominik Bartos
> Priority: Major
> Time Spent: 50m
> Remaining Estimate: 0h
>
> When a customer upgrades a versioned flow that changes a parameter referenced
> by an enabled controller service, the update fails with a NiFi-style error
> that does not tell the user what action to take. The customer does not know
> they need to disable the referencing controller service, run the upgrade, and
> then re-enable it.
> *Steps to Reproduce (Example)*
> Deploy a flow that uses SnowflakeConnectionService (Snowflake Connection
> Pool) referencing parameter Snowflake Authentication Strategy.
> Enable the Snowflake Connection Pool controller service so the flow is
> running.
> Attempt to upgrade the flow to a new version that changes the value of
> Snowflake Authentication Strategy.
> *Actual Result*
> The upgrade fails with:
> `Failed to perform update flow request due to Failed to update flow on all
> nodes in cluster due to Cannot update parameter 'Snowflake Authentication
> Strategy' because it is referenced by
> StandardControllerServiceNode[service=SnowflakeConnectionService[id=464d8329-90a8-302f-b85e-915efb3d0745],
> name=Snowflake Connection Pool, active=true], which currently has a state of
> ENABLED`
> No guidance is provided about how to resolve the failure.
> *Expected Result*
> The error message should explain the cause and the remediation steps. The
> prefix Failed to perform update flow request due to Failed to update flow on
> all nodes in cluster due to is produced upstream and cannot be changed, so
> the remediation must be appended to the existing message.
> *Proposed Message*
> {code:java}
> Failed to perform update flow request due to Failed to update flow on all
> nodes in cluster due to Cannot update parameter 'Snowflake Authentication
> Strategy' because it is referenced by controller service 'Snowflake
> Connection Pool' (SnowflakeConnectionService,
> id=464d8329-90a8-302f-b85e-915efb3d0745), which is currently ENABLED.
> To resolve this:
> 1. Disable the 'Snowflake Connection Pool' controller service (and any
> components that reference it, if prompted).
> 2. Retry the flow upgrade.
> 3. Re-enable the 'Snowflake Connection Pool' controller service once the
> upgrade completes. `
> {code}
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