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https://issues.apache.org/jira/browse/NIFI-16459?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mark Payne resolved NIFI-16459.
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Fix Version/s: nifi-api-2.14.0
Resolution: Fixed
> [Connectors] Start and stop each nested processor once when draining a
> Connector
> --------------------------------------------------------------------------------
>
> Key: NIFI-16459
> URL: https://issues.apache.org/jira/browse/NIFI-16459
> Project: Apache NiFi
> Issue Type: Bug
> Reporter: Bob Paulin
> Assignee: Bob Paulin
> Priority: Major
> Fix For: nifi-api-2.14.0
>
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> {color:#000000}startNonSourceComponents and stopSourceComponents collected
> processorsrecursively at every level while also recursing into child groups,
> so aprocessor N groups deep was started or stopped N+1 times. A repeated
> startof a running processor never completes, which left drainFlowFiles
> blockedand the Connector stuck in DRAINING. Each level now visits only its
> ownprocessors, classified against the root group's connections.{color}
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