[jira] [Assigned] (NIFI-5464) Local Ports are able to be started without incoming connections, then use a lot of CPU

["Mark Payne (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/NIFI-5464?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mark Payne reassigned NIFI-5464:
--------------------------------

    Assignee: Mark Payne

> Local Ports are able to be started without incoming connections, then use a lot of CPU
> --------------------------------------------------------------------------------------
>
>                 Key: NIFI-5464
>                 URL: https://issues.apache.org/jira/browse/NIFI-5464
>             Project: Apache NiFi
>          Issue Type: Bug
>          Components: Core Framework
>            Reporter: Mark Payne
>            Assignee: Mark Payne
>            Priority: Major
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> Currently, validation of a LocalPort simply checks that it has an outgoing connection. This means that it's possible to create an outgoing connection for a port but not have any incoming connections. When this happens, if the Port is started, the framework determines that it is a "source component" because it has no incoming connections. As such, it is never yielded via the "bored yield duration". This results in high CPU usage.
> The fix in this case, I believe, is to address the validation. We should not allow a Local Port to be enabled if it has no incoming connections.



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