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https://issues.apache.org/jira/browse/NIFI-7479?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17116173#comment-17116173
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Alessandro D'Armiento commented on NIFI-7479:
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I am trying to reproduce the error, but it seems to be working when using the
variable registry to set the listening port.
However, I found out that the value of the port is not validated against
negative or too high values when the variable registry is used and this leads
to possibly misleading errors.
> Listening Port property on HandleHttpRequest doesn't work with parameters
> -------------------------------------------------------------------------
>
> Key: NIFI-7479
> URL: https://issues.apache.org/jira/browse/NIFI-7479
> Project: Apache NiFi
> Issue Type: Bug
> Affects Versions: 1.11.4
> Reporter: David Malament
> Priority: Major
> Attachments: image-2020-05-22-10-29-01-827.png
>
>
> The Listening Port property on the HandleHttpRequest processor clearly
> indicates that parameters are supported (see screenshot) and the processor
> starts up successfully, but any requests to the configured port give a
> "connection refused" error. Switching the property to a hard-coded value or a
> variable instead of a parameter restores functionality.
> !image-2020-05-22-10-29-01-827.png!
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