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https://issues.apache.org/jira/browse/NIFI-9361?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mark Payne resolved NIFI-9361.
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Resolution: Duplicate
> Node can fail to DELETE connection while others finish if upstream component
> is funnel
> --------------------------------------------------------------------------------------
>
> Key: NIFI-9361
> URL: https://issues.apache.org/jira/browse/NIFI-9361
> Project: Apache NiFi
> Issue Type: Bug
> Components: Core Framework
> Reporter: Mark Payne
> Priority: Major
>
> When a Connection is deleted, it verifies 3 things before the deletion can
> occur:
> 1. The queue is empty
> 2. The source either is a Funnel or is stopped
> 3. The destination either is a Funnel or is stopped
> This means that if we delete a connection whose source is a Funnel and whose
> destination is a Processor, we can have an issue where nodes in the cluster
> verify that the connection can be deleted.
> Then, when the nodes go to perform the delete, a node can fail to perform the
> delete because it now has data.
> To avoid this, if the source is a funnel, we need to look at its upstream
> components (recursively) until we encounter something other than a funnel or
> we reach a dead end. Only if all upstream components are stopped should we
> allow the connection to be deleted.
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